OSISKO INTERSECTS 2223 g/t Au OVER 2.0 METRES AT WINDFALL

Posted on January 7, 2019November 8, 2023 by Yannick Fradette

Infill Drilling Hits Bonanza Grade in Zone 27

(Toronto, January 7, 2019) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new infill drilling results from the ongoing drill definition and expansion program at its 100% owned Windfall Lake gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec. The 800,000 metre drill program commenced in late 2015. The program is currently focussed on infill drilling within the main Windfall gold deposit and the adjacent Lynx deposit (located immediately NE of Windfall), exploration and expansion drilling on the main mineralized zones, and deep exploration in the central areas of the intrusive system. Significant new analytical results from 53 intercepts in 24 drill holes and 5 wedges focused on infill drilling from surface and underground are presented below.

Highlights from new infill drilling results include: 2223 g/t Au over 2.0 metres in WST-18-0025; 69.9 g/t Au over 2.7 metres in OSK-W-18-1785; 64.2 g/t Au over 2.1 metres in OSK-W-18-1785-W1; 12.3 g/t Au over 10.7 metres in OSK-W-18-1797; 34.6 g/t Au over 3.5 metres in OSK-W-18-1781; 45.5 g/t Au over 2.6 metres in OSK-W-18-1706 and 30.5 g/t Au over 3.5 metres in OSK-W-18-1756. Maps showing hole locations and full analytical results are available at www.osiskomining.com.

Hole Number	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Type	Mineralized Zone
OSK-W-18-1066-W1	792.0	794.5	2.5	18.1		Infill	Underdog
OSK-W-18-1139-W2	727.0	729.0	2.0	5.29		Infill	Underdog
	735.8	738.0	2.2	9.92		Infill	Underdog
including	736.8	737.4	0.6	31.4		Infill	Underdog
OSK-W-18-1386-W2	812.0	814.5	2.5	11.4		Infill	Lynx
including	812.9	813.9	1.0	26.8		Infill	Lynx
OSK-W-18-1706	360.0	362.6	2.6	45.5	15.7	Infill	Lynx
including	362.2	362.6	0.4	294	100	Infill	Lynx
OSK-W-18-1737	108.0	110.0	2.0	7.18		Infill	Bobcat
	362.0	364.3	2.3	13.0		Infill	Caribou
	514.0	516.0	2.0	16.2		Infill	Lynx
including	515.3	515.6	0.3	96.1		Infill	Lynx
	628.0	630.0	2.0	9.20		Infill	Lynx
including	629.1	629.5	0.4	42.4		Infill	Lynx
	688.5	690.7	2.2	19.0		Infill	Lynx
including	689.0	690.2	1.2	33.7		Infill	Lynx
	743.0	745.9	2.9	4.60		Infill	Lynx
including	745.0	745.3	0.3	29.8		Infill	Lynx
OSK-W-18-1744-W2	541.0	543.0	2.0	17.7		Infill	Lynx
including	542.2	542.6	0.4	74.0		Infill	Lynx
OSK-W-18-1756	223.5	227.0	3.5	30.5		Infill	Lynx
OSK-W-18-1760	238.9	241.0	2.1	10.5		Infill	Lynx
including	238.9	239.4	0.5	43.2		Infill	Lynx
OSK-W-18-1761	54.0	56.0	2.0	4.37		Infill	Caribou
including	55.1	56.0	0.9	9.43		Infill	Caribou
	98.0	100.0	2.0	4.09		Infill	Caribou
OSK-W-18-1772	349.6	351.9	2.3	4.37		Infill	Lynx
OSK-W-18-1773	206.0	208.5	2.5	14.3		Infill	Caribou
	608.0	611.0	3.0	7.59		Infill	Zone 27
OSK-W-18-1774	251.1	255.0	3.9	17.0		Infill	Lynx
including	251.1	252.0	0.9	56.7		Infill	Lynx
OSK-W-18-1779	286.5	288.5	2.0	6.13		Infill	Caribou
OSK-W-18-1781	146.7	148.9	2.2	12.7		Infill	Lynx
including	147.7	148.6	0.9	30.9		Infill	Lynx
	225.0	228.5	3.5	34.6		Infill	Lynx
OSK-W-18-1785	225.0	227.0	2.0	18.5	17.2	Infill	Lynx
including	225.4	225.7	0.3	109	100	Infill	Lynx
	249.2	251.9	2.7	69.9	35.3	Infill	Lynx
including	251.4	251.9	0.5	287	100	Infill	Lynx
	264.9	269.0	4.1	6.87		Infill	Lynx
including	264.9	265.2	0.3	51.9		Infill	Lynx
OSK-W-18-1785-W1	224.2	226.3	2.1	64.2	28.2	Infill	Lynx
including	224.8	225.1	0.3	352	100	Infill	Lynx
	349.4	352.0	2.6	3.42		Infill	Lynx
	361.6	364.0	2.4	4.89		Infill	Lynx
OSK-W-18-1786	93.0	95.0	2.0	14.6		Infill	Caribou
including	93.7	94.1	0.4	71.7		Infill	Caribou
	115.2	117.3	2.1	3.50		Infill	Caribou
OSK-W-18-1788	81.6	83.6	2.0	9.87		Infill	Caribou
including	81.6	81.9	0.3	65.0		Infill	Caribou
	87.7	90.1	2.4	4.03		Infill	Caribou
	122.8	125.2	2.4	3.00		Infill	Caribou
including	122.8	123.3	0.5	8.62		Infill	Caribou
OSK-W-18-1789	481.7	483.9	2.2	3.56		Infill	Caribou
	575.0	577.0	2.0	4.92		Infill	Zone 27
	593.3	595.4	2.1	4.47		Infill	Zone 27
OSK-W-18-1791	272.5	275.0	2.5	30.9		Infill	Lynx
including	272.5	273.4	0.9	77.3		Infill	Lynx
	280.0	282.9	2.9	22.1		Infill	Lynx
OSK-W-18-1792	264.0	266.5	2.5	4.29		Infill	Lynx
	270.8	280.8	10.0	3.70		Infill	Lynx
including	270.8	273.3	2.5	6.37
including	278.1	280.8	2.7	5.01
OSK-W-18-1795	257.5	259.5	2.0	15.5		Infill	Caribou
including	259.0	259.5	0.5	61.9		Infill	Caribou
	318.6	325.6	7.0	11.4		Infill	Zone 27
including	324.0	325.6	1.6	40.9		Infill	Zone 27
OSK-W-18-1797	192.2	202.9	10.7	12.3		Infill	Caribou
including	192.2	194.0	1.8	31.1
including	200.1	201.0	0.9	38.8
OSK-W-18-1803	291.4	294.2	2.8	3.68		Infill	Caribou
WST-18-0023	44.4	47.0	2.6	3.58		Infill	Zone 27
including	44.4	44.7	0.3	25.5		Infill	Zone 27
WST-18-0025	33.0	35.0	2.0	7.96		Infill	Zone 27
including	33.4	34.3	0.9	17.7		Infill	Zone 27
	65.0	67.0	2.0	2223	42.8	Infill	Zone 27
including	66.2	67.0	0.8	5550	100	Infill	Zone 27
WST-18-0026	49.4	51.6	2.2	3.80		Infill	Zone 27
including	49.4	49.7	0.3	25.6		Infill	Zone 27
	107.4	110.0	2.6	4.31		Infill	Zone 27
WST-18-0035	56.0	58.0	2.0	14.9		Infill	Zone 27
including	56.0	57.0	1.0	29.5		Infill	Zone 27
	60.9	65.0	4.1	5.98		Infill	Zone 27
including	63.9	64.2	0.3	44.2		Infill	Zone 27
WST-18-0036	63.5	67.1	3.6	4.77		Infill	Zone 27
including	66.3	67.1	0.8	12.6		Infill	Zone 27

Note: True widths are estimated at 65 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below.

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation (m)	Section
OSK-W-18-1066-W1	332	-56	1137	452486	5434435	401	2475
OSK-W-18-1139-W2	333	-56	819	452474	5434469	401	2500
OSK-W-18-1386-W2	136	-54	818	453802	5435746	401	4275
OSK-W-18-1706	137	-46	416	453500	5435428	399	3850
OSK-W-18-1737	130	-53	1810	452902	5435184	411	3200
OSK-W-18-1744-W2	134	-48	621	453450	5435484	401	3825
OSK-W-18-1756	330	-57	291	453358	5434956	397	3500
OSK-W-18-1760	332	-55	267	453358	5434956	397	3500
OSK-W-18-1761	329	-50	201	452873	5435000	408	3100
OSK-W-18-1772	331	-64	392	453431	5434976	396	3575
OSK-W-18-1773	331	-56	621	452632	5434696	400	2750
OSK-W-18-1774	331	-60	315	453307	5434951	398	3450
OSK-W-18-1779	334	-58	297	452430	5434514	400	2475
OSK-W-18-1781	331	-57	300	453326	5434951	397	3475
OSK-W-18-1785	334	-59	273	453425	5434953	396	3550
OSK-W-18-1785-W1	334	-59	375	453425	5434953	396	3550
OSK-W-18-1786	332	-51	201	452319	5434588	401	2400
OSK-W-18-1788	330	-61	141	452289	5434590	401	2375
OSK-W-18-1789	332	-56	624	452611	5434691	401	2725
OSK-W-18-1791	331	-50	294	453365	5434931	397	3500
OSK-W-18-1792	331	-58	315	453424	5434939	396	3550
OSK-W-18-1795	354	-45	360	452070	5434451	403	2125
OSK-W-18-1797	339	-56	247	452183	5434396	399	2200
OSK-W-18-1803	334	-58	585	452547	5434723	404	2675
WST-18-0023	179	-36	102	452280	5434973	263*	2575
WST-18-0025	159	12	102	452280	5434974	264*	2575
WST-18-0026	159	-31	145	452280	5434974	263*	2575
WST-18-0035	314	-2	127	452057	5434604	178*	2200
WST-18-0036	308	-2	136	452058	5434603	178*	2200

Note: * Indicates drill hole completed from underground drill station.

OSK-W-18-1066-W1 intersected 18.1 g/t Au over 2.5 metres in Underdog. Mineralization contains 12% pyrite in silica flooding and local visible gold within a moderate sericite and strong silica altered felsic porphyritic intrusion.

OSK-W-18-1139-W2 intersected two intervals in Underdog: 5.29 g/t Au over 2.0 metres and 9.92 g/t Au over 2.2 metres. The first interval contains 1% disseminated and stringer pyrite within a moderated sericite and weak silica altered felsic porphyritic intrusion. The second interval contains 3% disseminated and stringer pyrite within a moderate sericite altered felsic porphyritic intrusion.

OSK-W-18-1386-W2 intersected 11.4 g/t Au over 2.5 metres in Lynx. Mineralization contains up to 2% disseminated pyrite with a crustiform quartz vein at a moderate carbonate and weak sericite altered contact between a gabbro and a felsic porphyritic intrusion.

OSK-W-18-1706 intersected 45.5 g/t Au over 2.6 metres in Lynx. Mineralization contains up to 20% pyrite stringers and clusters within a strong silica and moderate chlorite altered gabbro.

OSK-W-18-1737 intersected six intervals: 7.18 g/t Au over 2.0 metres in Bobcat, 13.0 g/t Au over 2.3 metres in Caribou, and 16.2 g/t Au over 2.0 metres, 9.20 g/t Au over 2.0 metres, 19.0 g/t Au over 2.2 metres and 4.60 g/t Au over 2.9 metres in Lynx. The first interval contains up to 10% crustiform veins and 5% disseminated pyrite within a strong sericite altered felsic fragmental intrusion. The second interval contains 9% pyrite stringers within a weak sericite, carbonate, silica and fuchsite altered gabbro. The third interval contains local visible gold, 20% quartz-tourmaline stringers and trace chalcopyrite within a strong pervasive silica altered rhyolite. The fourth interval contains 2% quartz-tourmaline and 3% pyrite stringers at the contact between a moderate fuchsite andesite and a silica altered rhyolite. The fifth interval contains up to 4% pyrite-tourmaline stringers within a moderate pervasive silica and sericite altered rhyolite. The last interval contains up to 1% disseminated and stringer pyrite with weak silica, fuchsite and sericite alteration at the contact between the andesite and a felsic porphyritic intrusion.

OSK-W-18-1744-W2 intersected 17.7 g/t Au over 2.0 metres in Lynx. Mineralization contains local visible gold with quartz-carbonate veins hosted in a moderate altered gabbro.

OSK-W-18-1756 intersected 30.5 g/t Au over 3.5 metres in Lynx. Mineralization contains up to 5% pyrite as disseminated, clusters and fragments, trace sphalerite and local visible gold within a moderate sericite altered felsic porphyritic intrusion.

OSK-W-18-1760 intersected 10.5 g/t Au over 2.1 metres in Lynx. Mineralization contains up to 10% pyrite-silica flooding and quartz-tourmaline veins within a moderate sericite altered felsic porphyritic intrusion.

OSK-W-18-1761 intersected two intervals in Caribou: 4.37 g/t Au over 2.0 metres and 4.09 g/t Au over 2.0 metres. The first interval contains up to 1% quartz-tourmaline and pyrite stringers within a moderate silica altered rhyolite. The second interval contains disseminated pyrite and quartz crustiform veins within a moderate chlorite, weak sericite and silica altered gabbro.

OSK-W-18-1772 intersected 4.37 g/t Au over 2.3 metres in Lynx. Mineralization contains up to 2% pyrite stringers, 2% crustiform quartz veins and trace sphalerite within a bleached, sericite and fuchsite altered gabbro.

OSK-W-18-1773 intersected two intervals: 14.3 g/t Au over 2.5 metres in Caribou and 7.59 g/t Au over 3.0 metres in Zone 27. The first interval contains up to 20% disseminated pyrite and 4% pyrite stringers within a faulted, silica and sericite altered rhyolite. The second interval contains up to 8% finely disseminated pyrite with pervasive silica flooding and 3% pyrite clusters within a moderate sericite and silica altered felsic porphyritic intrusion.

OSK-W-18-1774 intersected 17.0 g/t Au over 3.9 metres in Lynx. Mineralization contains 3% disseminated pyrite hosted in a moderate biotite and weak chlorite, sericite altered rhyolite.

OSK-W-18-1779 intersected 6.13 g/t Au over 2.0 metres in Caribou. Mineralization contains trace disseminated and stringer pyrite within a moderate chlorite, carbonate, sericite and a weak silica altered rhyolite.

OSK-W-18-1781 intersected two intervals in Lynx: 12.7 g/t Au over 2.2 metres and 34.6 g/t Au over 3.5 metres. The first interval contains trace disseminated pyrite and pyrite-silica flooding within a weak sericite altered felsic porphyritic intrusion. The second interval contains local visible gold, up to 8% disseminated pyrite and trace sphalerite hosted in a strong silica and weak sericite altered rhyolite.

OSK-W-18-1785 intersected three intervals in Lynx: 18.5 g/t Au over 2.0 metres, 69.9 g/t Au over 2.7 metres and 6.87 g/t Au over 4.1 metres. The first interval contains local visible gold, 1% disseminated and stringer pyrite within a strong pervasive silica, weak fuchsite altered rhyolite. The second interval contains local visible gold, up to 8% finely disseminated pyrite and trace sphalerite within a strong silica and fuchsite altered felsic fragmental intrusion. The third interval contains 2% pyrite with silica flooding and ptygmatic quartz-tourmaline veins within a moderate sericite, silica and carbonate altered rhyolite.

OSK-W-18-1785-W1 intersected three intervals in Lynx: 64.2 g/t Au over 2.1 metres, 3.42 g/t Au over 2.6 metres and 4.89 g/t Au over 2.4 metres. The first interval contains 3% pyrite in stockwork and disseminated, trace chalcopyrite, and local visible gold hosted in a moderate sericite and fuchsite altered gabbro. The second interval contains 10% finely disseminated pyrite, trace sphalerite and crustiform quartz veins within a moderate chlorite, carbonate and fuchsite altered gabbro. The third interval contains 1% fine pyrite as disseminated, stringers and clusters, and quartz crustiform veins hosted in weak fuchsite, moderately chlorite and carbonate altered gabbro.

OSK-W-18-1786 intersected two intervals in Caribou: 14.6 g/t Au over 2.0 metres and 3.50 g/t over 2.1 metres. The first interval contains semi-massive pyrite and quartz-tourmaline veins hosted in a moderate sericite, silica and carbonate altered rhyolite. The second interval contains semi-massive, stringer and disseminated pyrite and trace sphalerite hosted in a silica and sericite altered rhyolite.

OSK-W-18-1788 intersected three intervals in Caribou: 9.87 g/t Au over 2.0 metres, 4.03 g/t Au over 2.4 metres and 3.00 g/t Au over 2.4 metres. The first interval contains disseminated and 45% semi-massive pyrite within a moderate sericite, weak fuchsite and silica altered rhyolite. The second interval contains 35% semi-massive pyrite, 15% quartz-tourmaline, 4% pyrite stringers and trace sphalerite and chalcopyrite within a weak silica altered felsic porphyritic intrusion. The third interval contains up to 35% semi-massive pyrite and 5% pyrite stringers hosted in a sericite and silica altered felsic porphyritic intrusion.

OSK-W-18-1789 intersected three intervals: 3.56 g/t Au over 2.2 metres in Caribou, and 4.92 g/t Au over 2.0 metres and 4.47 g/t Au over 2.1 metres in Zone 27. The first interval contains 3% pyrite stringers and clusters in a moderate bleached andesite. The second interval contains 2% pyrite stringers with pervasive silica flooding hosted in a weak silica and sericite altered felsic porphyritic intrusion. The third interval contains 2% pyrite stringers and 2% quartz veinlets hosted at the contact between a moderately bleached andesite and a weak sericite altered felsic porphyritic intrusion.

OSK-W-18-1791 intersected two intervals in Lynx: 30.9 g/t Au over 2.5 metres and 22.1 g/t Au over 2.9 metres. The first interval contains up to 5% pyrite clusters and stringers, local visible gold and quartz-tourmaline veins within a strong silica and sericite altered rhyolite. The second interval contains up to 3% pyrite stringers, ptygmatic tourmaline veins and local visible gold within strong silica altered rhyolite.

OSK-W-18-1792 intersected two intervals in Lynx: 4.29 g/t Au over 2.5 metres and 3.70 g/t Au over 10.0 metres. The first interval contains finely disseminated pyrite and ptygmatic tourmaline hosted in a sericitized and silicified fragmental felsic intrusion. The second interval contains up to 10% finely disseminated pyrite and local visible gold within a strong silica and sericite altered felsic fragmental intrusion.

OSK-W-18-1795 intersected two intervals: 15.5 g/t Au over 2.0 metres in Caribou and 11.4 g/t Au over 7.0 metres in Zone 27. The first interval contains up to 10% pyrite clusters and stringers, trace chalcopyrite and quartz-tourmaline veins within a strong chlorite and moderate sericite altered felsic porphyritic intrusion. The second interval contains up to 30% disseminated pyrite and up to 10% pyrite stringers within a strong silica altered rhyolite.

OSK-W-18-1797 intersected 12.3 g/t Au over 10.7 metres in Caribou. Mineralization contains up to 10% pyrite stringers hosted in a moderate sericite altered porphyritic intrusion.

OSK-W-18-1803 intersected 3.68 g/t Au over 2.8 metres in Caribou. Mineralization contains up to 6% pyrite stringers and trace ptygmatic tourmaline veins hosted in a strong silica and weak fuchsite altered felsic porphyritic intrusion.

WST-18-0023 intersected 3.58 g/t Au over 2.6 metres in Zone 27. Mineralization contains up to 12% pyrite clusters, stringers and stockwork within a strongly bleached andesite. WST-18-0023 was drilled from underground drill station AN-140-270-S located 140 metres below surface from section 2575E.

WST-18-0025 intersected two intervals in Zone 27: 7.96 g/t Au over 2.0 metres and 2223 g/t Au over 2.0 metres. The first interval contains disseminated pyrite and quartz-carbonate veins within a moderate chlorite and carbonate gabbro. The second interval contains local visible gold, semi-massive pyrite and pyrite-tourmaline stringers hosted in a moderate sericite and silica altered felsic volcanic. WST-18-0025 was drilled from underground drill station AN-140-270-S located 140 metres below surface from section 2575E.

WST-18-0026 intersected two intervals in Zone 27: 3.80 g/t Au over 2.2 metres and 4.31 g/t Au over 2.6 metres. First interval is composed of 30% semi-massive pyrite with 10% disseminated tourmaline in a strongly sericitized porphyritic felsic intrusion. The second interval is composed of 7% pyrite stringers and 1% disseminated pyrite in a bleached andesite. WST-18-0026 was drilled from underground drill station AN-140-270-S located 140 metres below surface from section 2575E.

WST-18-0035 intersected two intervals in Zone 27: 14.9 g/t Au over 2.0 metres and 5.98 g/t Au over 4.1 metres. First interval is composed of 1% disseminated pyrite with trace pyrite in quartz-tourmaline veins hosted in a sericite altered dacite. The second interval is composed of 15% semi-massive pyrite in a moderately sericitized and silicified porphyritic felsic intrusion. WST-18-0035 was drilled from underground drill station RA-225-070-O located 225 metres below surface from section 2200E.

WST-18-0036 intersected 4.77 g/t Au over 3.6 metres in Zone 27. Mineralized zone is composed of 2% pyrite stringers, 1% disseminated sub-euhedral pyrite and trace pyrite-tourmaline stringers in a moderately sericitized porphyritic felsic intrusion with small quartz-eye and local volcanics fragments. WST-18-0036 was drilled from underground drill station RA-225-070-O located 225 metres below surface from section 2200E.

Qualified Person

The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Louis Grenier, M.Sc.A., P.Geo. (OGQ 800), Project Manager of Osisko’s Windfall Lake gold project, who is a “qualified person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).

Quality Control and Reporting Protocols

True width determination is estimated at 65-80% of the reported core length interval for the zone. Assays are uncut except where indicated. Intercepts occur within geological confines of major zones but have not been correlated to individual vein domains at this time. Reported intervals include minimum weighted averages of 3.0 g/t Au diluted over core lengths of at least 2.0 metres. All NQ core assays reported were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at (i) ALS Laboratories in Val d’Or, Québec, Thunder Bay, Ontario, Sudbury, Ontario or Vancouver, British Colombia, or (ii) Bureau Veritas in Timmins, Ontario. The 1-kilogram screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. Selected samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS Laboratories. Drill program design, Quality Assurance/Quality Control (“QA/QC”) and interpretation of results is performed by qualified persons employing a QA/QC program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for QA/QC purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assay.

About the Windfall Lake Gold Deposit

The Windfall Lake gold deposit is located between Val-d’Or and Chibougamau in the Abitibi region of Québec, Canada. The mineral resource defined by Osisko, as disclosed in the Windfall Lake Technical Report (as defined below) and November 27, 2018 Lynx resource update, comprises 2,874,000 tonnes at 8.17 g/t Au (754,000 ounces) in the indicated mineral resource category and 10,352,000 tonnes at 7.11 g/t Au (2,366,000 ounces) in the inferred mineral resource category. For details regarding the key assumptions, parameters and methods used to estimate the mineral resources presented in respect of the Windfall Lake gold project, please see the technical report entitled “Technical Report and Mineral Resource Estimate for the Windfall Lake Project, Windfall Lake and Urban-Barry Properties” and dated June 12, 2018 (effective date of May 14, 2018), which has been prepared by InnovExplo Inc. from Val-d’Or, Québec (the “Windfall Lake Technical Report”) and the press release “Osisko Releases Mineral Resource Update for Lynx” dated November 27, 2018, which has been prepared by Osisko and reviewed and approved by Micon International, Ltd. from Toronto, Ontario. The Windfall Lake Technical Report and press release are available on Osisko’s website at www.osiskomining.com and on SEDAR under Osisko’s issuer profile at www.sedar.com. The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. Mineralization occurs in four principal zones: Lynx, Zone 27, Caribou and Underdog. All zones comprise sub-vertical lenses following intrusive porphyry contacts plunging to the northeast. The deposit is well defined from surface to a depth of 900 metres and remains open along strike and at depth. Mineralization has been identified 30 metres from surface in some areas and as deep as 2,000 metres in others, with significant potential to extend mineralization down-plunge and at depth.

About Osisko Mining Inc.

Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% interest in the high-grade Windfall Lake gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding the Urban Barry area and nearby Quevillon area (over 3,300 square kilometres), a 100% interest in the Marban project located in the heart of Québec’s prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Garrison property. The Corporation also holds interests and options in a number of additional properties in northern Québec and Ontario.

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the Windfall Lake gold deposit being one of the highest grade resource-stage gold projects in Canada; the significance of results from the new infill drilling and ongoing drill definition and expansion program at the Windfall Lake gold project; the significance of assay results presented in this news release; the deposit remaining open along strike and at depth; potential depth extensions of the mineralized zones down-plunge and at depth; the actual mineralization of local visible gold; the current 800,000 metre drill program; the type of drilling included in the drill program; potential mineralization; the potential to extend mineralization up and down-plunge and at depth at the Windfall Lake gold deposit; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities, including the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation at the time such assumptions and estimates were made, and involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions. Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information, Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:

John Burzynski
President and Chief Executive Officer

Telephone: (416) 363-8653

OSISKO ANNOUNCES RENEWAL OF NORMAL COURSE ISSUER BID

Posted on December 28, 2018November 8, 2023 by Yannick Fradette

(Toronto, December 28, 2018) Osisko Mining Inc. (TSX:OSK) (the “Corporation” or “Osisko“) today announces renewal of the normal course issuer bid program of the Corporation to purchase for cancellation, from time to time over a 12-month period, common shares of the Corporation (“Common Shares“) listed on the Toronto Stock Exchange (“TSX“) in an aggregate amount of up to 10% of the “public float” of the Corporation (the “NCIB Program“), being 14,251,609 Common Shares.

Repurchases under the NCIB Program may commence on January 2, 2019 and will terminate on January 1, 2020 or on such earlier date as the NCIB Program is complete. Purchases of Common Shares under the NCIB Program will be made in Canada through the facilities of the TSX in accordance with its rules. Daily purchases will be limited to 208,038 Common Shares, other than block purchase exemptions, representing 25% of the average daily trading volume of the Common Shares on the TSX for the six month period ending November 30, 2018, being 832,152 Common Shares.

The price that the Corporation may pay for any Common Shares purchased under the NCIB Program will be the prevailing market price at the time of purchase and any Common Shares purchased by the Corporation will be cancelled. The actual number of Common Shares repurchased under the NCIB Program and the timing of such repurchases will be at Osisko’s discretion and shall be subject to the limitations set out in the TSX Company Manual.

The board of directors of Osisko believes that the underlying value of the Corporation may not be reflected in the market price of the Common Shares from time to time and that, accordingly, the purchase of Common Shares will increase the proportionate interest in the Corporation of, and be advantageous to, all remaining shareholders of the Corporation

As of December 27, 2018, there were 257,189,331 Common Shares issued and outstanding, and the Corporation had a public float of 142,516,096 Common Shares.

Osisko has appointed BMO Nesbitt Burns Inc. to make any purchases under the NCIB Program on its behalf. The commencement of the NCIB Program is subject to TSX approval.

During the prior NCIB Program of the Corporation, which commenced on December 29, 2017 and will terminate on December 28, 2018, Osisko had approval to acquire up to 15,204,587 Common Shares, but nil Common Shares were acquired.

About Osisko Mining Inc.

Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% interest in the high-grade Windfall Lake gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quevillon area (over 3,300 square kilometres), a 100% interest in the Marban project located in the heart of Québec’s prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Garrison property. The Corporation also holds interests and options in a number of additional properties in northern Québec and Ontario.

Forward-looking statements

This press release contains forward-looking statements. These forward-looking statements, by their nature, require the Corporation to make certain assumptions and necessarily involve known and unknown risks and uncertainties that could cause actual results to differ materially from those expressed or implied in these forward-looking statements. Words such as “may”, “will”, “would”, “could”, “expect”, “believe”, “plan”, “anticipate”, “intend”, “estimate”, “continue”, or the negative or comparable terminology, as well as terms usually used in the future and the conditional, are intended to identify forward-looking statements including the fact that the Corporation “expects”, “plans”, “anticipates”, “believes”, “intends”, “estimates”, “projects”, “potential”, “scheduled” and similar expressions or variations (including negative variations), or that events or conditions “will”, “would”, “may”, “could” or “should” occur including, without limitation, statements about the board of directors of Osisko’s belief that the NCIB Program is advantageous to shareholders and that underlying value of the Corporation may not be reflected in the market price of the Common Shares, the Corporation’s intentions regarding the NCIB Program and whether the Corporation will receive the requisite acceptance of the TSX in respect of the NCIB Program. Although Osisko believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements involve known and unknown risks, uncertainties and other factors and are not guarantees of future performance and actual results may accordingly differ materially from those in forward looking statements. Factors that could cause the actual results to differ materially from those in forward-looking statements include, without limitation: fluctuations in the prices of the commodities; fluctuations in the value of the Canadian dollar relative to the U.S. dollar; regulatory changes by national and local government, including corporate law, permitting and licensing regimes and taxation policies; continued availability of capital and financing and general economic, market or business conditions; business opportunities that become available to, or are pursued by Osisko; other uninsured risks. The forward looking statements contained in this press release are based upon assumptions management believes to be reasonable, including, without limitation: the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions. Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information, Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information, please contact Osisko Mining Inc.:

John Burzynski

President and Chief Executive Officer

Telephone: (416) 363-8653

OSISKO WINDFALL INITIAL BULK SAMPLE RETURNS 9.7 g/t Au HEAD GRADE

Posted on December 18, 2018November 8, 2023 by Yannick Fradette

39% Higher Grade than Resource Model

(Toronto, December 18, 2018) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide preliminary results from Zone 27 bulk sampling. The Zone 27 bulk sample is the first of three planned 5,000 tonne samples in the ongoing evaluation work at the Windfall project.

Results below represent 2,078 tonnes mined from Zone 27 wireframe 115. The balance of 2,922 tonnes will be processed in the new year, with reconciled results from the full 5,000 tonne sample expected to be available by March 2019.

The average head grade obtained from the 2,082 tonnes is 9.7 g/t Au and 5.5 g/t Ag. These initial results successfully confirm prior drill hole information and the visible mineralization along the mined portion of Zone 27. The average head grade from the sample is 39% higher than indicated in the resource block model for this area of Zone 27 (7.0 g/t Au). Results are presented in the table below:

Zone 27 Preliminary Bulk Sample Results

Tonnes

Milled (Dry)

Mill Head Grade

g/t Au

Mill Head

Grade

g/t Ag

Total Contained Gold Oz.

Total Contained Silver Oz.

2,078

9.7

5.5

650

366

Osisko President and CEO John Burzynski commented: “We are very pleased to deliver an early Christmas gift to our shareholders with these great preliminary results from the Zone 27 bulk sample. Having the grade come in 39% higher than anticipated is a strong result, and it is particularly encouraging given the recent increase in grades shown in the Lynx Zone resource update (see Osisko news release dated November 27, 2018). The infill drilling program, recent resource update and now the initial bulk sampling results have all been demonstrating that the more detailed work we do at Windfall, the better it gets.”

Mill feed tonnages were provided by the custom mill used in the sample processing (Northern Sun Mining, operator of the Redstone mill in Timmins region, Ontario). Daily composite samples collected during the processing of the bulk sample were assayed by ALS Laboratories in Val d’Or.

Processing and Resource Block Model Reconciliation

Processing of the bulk sample produced gold/silver gravity and flotation concentrates. The first 2,078 tonnes has been processed at an average throughput of approximately 350 dry tonnes per day. The total amount of gold and silver contained and produced from the full 5,000-tonne bulk sample, incorporating all underground data, will be used to reconcile the representative area in the Zone 27 resource block model once the full sample has been processed.

The resource block model was upgraded in this part of the deposit using recent 12.5 metre infill drilling and PEA block modelling parameters, and an average of grade of 7.0 g/t Au was estimated in the area mined. The preliminary results returned 9.7 g/t Au head grade from the first 2,078 tonnes test milled. PEA metallurgical testwork indicated recovery of 92.5% for Zone 27 (communition, gravity and whole ore leach) which is most appropriate given the nature of ore. Test mill availability dictated using a mill with a different process flowsheet consisting of comminution, gravity and flotation. Final recoveries will be determined in the new year based on the concentrate volumes and reconciliation upon the completion of processing of the full 5,000 tonne sample. Osisko’s current mill design work anticipates using communition, gravity and whole ore leach as noted in the PEA and the Corporation anticipates ultimate recoveries to be within the parameters outlined (92.5%) from the metallurgically simple ore at Windfall.

Qualified Person

The scientific and technical content in this news release has been reviewed, prepared and approved by Kim-Quyên Nguyên, MBA., P.Eng. (OIQ 146014), Project Manager (Technical Studies) of the Windfall Lake gold project, who is a “qualified person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”). The actual estimation of the excavation from the Bulk Sample Resource Block Model from Zone 27 of the Windfall Lake Deposit, with an effective date of December 6, 2018, was prepared by Judith St-Laurent, P.Geo (OGQ #1023), B.Sc., of Osisko Mining, who is a “qualified person” as defined by NI 43-101. The scientific and technical content in this news release has been reviewed and approved by Mathieu Savard, P.Geo (OGQ #510), Vice President Exploration (Québec) of Osisko, who is a “qualified person” within the meaning of NI 43-101.

About the Windfall Lake Gold Deposit

The Windfall Lake gold deposit is located between Val-d’Or and Chibougamau in the Abitibi region of Québec, Canada. The mineral resource defined by Osisko, as disclosed in the Windfall Lake Technical Report (as defined below) and November 27, 2018 Lynx resource update, comprises 2,874,000 tonnes at 8.17 g/t Au (754,000 ounces) in the indicated mineral resource category and 10,352,000 tonnes at 7.11 g/t Au (2,366,000 ounces) in the inferred mineral resource category. For details regarding the key assumptions, parameters and methods used to estimate the mineral resources presented in respect of the Windfall Lake gold project, please see the technical report entitled “Technical Report and Mineral Resource Estimate for the Windfall Lake Project, Windfall Lake and Urban-Barry Properties” and dated June 12, 2018 (effective date of May 14, 2018), which has been prepared by InnovExplo Inc. from Val-d’Or, Québec (the “Windfall Lake Technical Report”) and the news release “Osisko Releases Mineral Resource Update for Lynx” dated November 27, 2018, which has been prepared by Osisko and reviewed and approved by Micon International, Ltd. from Toronto, Ontario. The Windfall Lake Technical Report and news release are available on Osisko’s website at www.osiskomining.com and on SEDAR under Osisko’s issuer profile at www.sedar.com. The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. Mineralization occurs in four principal zones: Lynx, Zone 27, Caribou and Underdog. All zones comprise sub-vertical lenses following intrusive porphyry contacts plunging to the northeast. The deposit is well defined from surface to a depth of 900 metres and remains open along strike and at depth. Mineralization has been identified 30 metres from surface in some areas and as deep as 2,000 metres in others, with significant potential to extend mineralization down-plunge and at depth.

About Osisko Mining Inc.

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the Windfall Lake gold deposit being one of the highest grade resource-stage gold projects in Canada; the significance of preliminary results from Zone 27 bulk sampling presented in this news release; plans to complete three 5,000 tonne samples, as well as other ongoing evaluation work at the Windfall project; the veracity of initial bulk sample results to confirm prior drill information; actual mineralization based on the visual nature of mineralization; shareholders considering a gift given before Christmas to be an early Christmas gift; timing to process the balance of 2,918 tonnes; reconciled results from the 5,000 tonne sample being available by early March 2019, if at all; the presentation of final recoveries; Osisko’s current mil design, including the use of communition, gravity and whole ore leached; the parameters of ultimate recoveries; the deposit remaining open along strike and at depth; potential depth extensions of the mineralized zones down-plunge and at depth; the type of drilling included in the drill program; potential mineralization; the potential to extend mineralization up and down-plunge and at depth at the Windfall Lake gold deposit; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities, including the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation at the time such assumptions and estimates were made, and involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including bulk sampling and drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including drilling and bulk sampling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions. Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information, Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law

For further information please contact:

John Burzynski
President and Chief Executive Officer

Telephone: (416) 363-8653

OSISKO INFILL 38.9 g/t Au OVER 13.7 METRES AT UNDERDOG

Posted on December 5, 2018November 8, 2023 by Yannick Fradette

Infill Drilling Continues to Intersect High Grade

(Toronto, December 5, 2018) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new infill drilling results from the ongoing drill definition and expansion program at its 100% owned Windfall Lake gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec. The 800,000 metre drill program commenced in late 2015. The program is currently focussed on infill drilling within the main Windfall gold deposit and the adjacent Lynx deposit (located immediately NE of Windfall), exploration and expansion drilling on the main mineralized zones, and deep exploration in the central areas of the intrusive system. Significant new analytical results from 38 intercepts in 13 drill holes and 4 wedges focused on infill drilling are presented below.

Todays results were not included in the recent Lynx resource update (see Osisko news release dated November 27, 2018). Highlights from new infill drilling results include: 161 g/t Au over 4.3 metres and 74.4 g/t Au over 2.0 metres in OSK-W-18-1768; 38.9 g/t Au over 13.7 metres and 27.7 g/t Au over 4.4 metres in OSK-W-18-1139-W1; 96.9 g/t Au over 2.6 metres and 32.0 g/t Au over 5.1 metres in OSK-W-18-1770; 16.9 g/t Au over 8.5 metres in OSK-W-18-1760; 53.0 g/t Au over 2.5 metres in OSK-W-18-1756 and 60.3 g/t Au over 2.0 metres in OSK-W-18-1765. Maps showing hole locations and full analytical results are available at www.osiskomining.com

Hole Number	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Type	Mineralized zone

OSK-EAG-13-509	536.8	539.2	2.4	4.32		Infill	Zone 27
OSK-W-18-1104-W1	446.0	448.0	2.0	6.52		Infill	Lynx
including	446.3	446.6	0.3	41.8		Infill	Lynx
OSK-W-18-1139-W1	696.0	698.3	2.3	26.4		Infill	Underdog
including	697.0	697.8	0.8	54.9		Infill	Underdog
	713.0	726.7	13.7	38.9	33.9	Infill	Underdog
including	719.0	724.4	5.4	81.7	69.2	Infill	Underdog
	768.7	771.0	2.3	47.8	45.2	Infill	Underdog
including	768.7	769.7	1.0	106	100	Infill	Underdog
	773.0	775.0	2.0	6.90		Infill	Underdog
including	774.0	774.3	0.3	41.6		Infill	Underdog
	790.0	794.4	4.4	27.7	26.8	Infill	Underdog
including	791.2	792.7	1.5	72.1	69.3	Infill	Underdog
OSK-W-18-1598-W1	511.0	513.0	2.0	51.5	46.5	Infill	Lynx
OSK-W-18-1741-W1	483.1	485.4	2.3	14.0		Infill	Lynx
including	484.4	484.8	0.4	73.4		Infill	Lynx
OSK-W-18-1748	122.0	124.0	2.0	4.23		Infill	Lynx
OSK-W-18-1756	169.5	172.0	2.5	53.0	31.9	Infill	Lynx
including	170.2	170.6	0.4	232	100	Infill	Lynx
	244.4	246.4	2.0	6.72		Infill	Lynx
OSK-W-18-1759	218.0	220.0	2.0	3.80		Infill	Lynx
OSK-W-18-1760	211.7	213.7	2.0	3.74		Infill	Lynx
	220.0	228.5	8.5	16.9	13.3	Infill	Lynx
OSK-W-18-1765	188.0	190.3	2.3	3.16		Infill	Lynx
including	189.8	190.3	0.5	10.5		Infill	Lynx
	203.0	205.0	2.0	9.84		Infill	Lynx
including	204.0	205.0	1.0	19.5		Infill	Lynx
	229.8	231.8	2.0	60.3	41.6	Infill	Lynx
including	231.1	231.4	0.3	217	100	Infill	Lynx
	249.4	251.8	2.4	7.41		Infill	Lynx
including	250.2	250.9	0.7	24.7		Infill	Lynx
OSK-W-18-1767	47.0	49.0	2.0	3.67		Infill	Caribou
OSK-W-18-1768	202.5	204.5	2.0	3.65		Infill	Lynx
including	202.5	202.8	0.3	23.2		Infill	Lynx
	219.0	222.4	3.4	13.0		Infill	Lynx
including	219.0	219.8	0.8	48.1		Infill	Lynx
	261.0	263.0	2.0	4.49		Infill	Lynx
	268.7	273.0	4.3	161	37.0	Infill	Lynx
including	269.2	269.6	0.4	866	100
and	271.9	272.7	0.8	381	100
	283.0	285.5	2.5	22.1		Infill	Lynx
including	284.1	284.7	0.6	85.2		Infill	Lynx
	294.0	296.0	2.0	74.4	15.1	Infill	Lynx
	330.3	332.6	2.3	8.06		Infill	Lynx
including	332.2	332.6	0.4	22.0		Infill	Lynx
OSK-W-18-1770	127.8	130.4	2.6	96.9	37.5	Infill	Lynx
including	128.7	129.5	0.8	293	100	Infill	Lynx
	172.0	175.0	3.0	11.1		Infill	Lynx
including	172.0	173.5	1.5	22.1		Infill	Lynx
	213.0	215.5	2.5	19.0		Infill	Lynx
including	214.1	214.8	0.7	67.9		Infill	Lynx
	246.8	249.0	2.2	30.2		Infill	Lynx
including	247.2	248.0	0.8	82.8		Infill	Lynx
	252.0	257.1	5.1	32.0	25.5	Infill	Lynx
including	256.0	257.1	1.1	113	83.4	Infill	Lynx
OSK-W-18-1771	276.8	279.0	2.2	6.83		Infill	Caribou
including	277.4	278.0	0.6	24.2		Infill	Caribou
OSK-W-18-1772	226.4	228.5	2.1	19.1		Infill	Lynx
including	226.4	227.7	1.3	30.7		Infill	Lynx
	274.2	276.3	2.1	31.3	24.0	Infill	Lynx
including	275.5	275.8	0.3	151	100	Infill	Lynx
	281.0	283.0	2.0	11.9		Infill	Lynx
WST-18-0017	76.6	79.0	2.4	12.8		Infill	Zone 27
including	76.6	77.2	0.6	45.1		Infill	Zone 27
WST-18-0024	25.7	28.1	2.4	26.5		Infill	Mallard

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation (m)	Section
OSK-EAG-13-509	330	-57	579	452523	5434658	403	2625
OSK-W-18-1104-W1	142	-50	501	453383	5435455	402	3775
OSK-W-18-1139-W1	333	-56	874	452474	5434469	401	2500
OSK-W-18-1598-W1	145	-51	546	453346	5435471	406	3750
OSK-W-18-1741-W1	144	-48	528	453328	5435466	406	3725
OSK-W-18-1748	301	-61	147	452908	5434835	390	3050
OSK-W-18-1756	330	-57	291	453358	5434956	397	3500
OSK-W-18-1759	331	-57	252	453323	5434955	397	3475
OSK-W-18-1760	332	-55	267	453358	5434956	397	3500
OSK-W-18-1765	333	-57	306	453359	5434955	397	3500
OSK-W-18-1767	329	-65	165	452578	5434902	405	2800
OSK-W-18-1768	332	-63	375	453429	5434977	396	3575
OSK-W-18-1770	335	-60	312	453306	5434954	398	3450
OSK-W-18-1771	334	-57	318	452475	5434526	402	2525
OSK-W-18-1772	331	-64	392	453429	5434977	396	3575
WST-18-0017	192	-6	177	452280	5434976	264	2575
WST-18-0024	170	-39	181	452280	5434976	264	2575

OSK-EAG-13-509 intersected 4.32 g/t Au over 2.4 metres in Zone 27. Mineralization consists of 3% disseminated pyrite and clusters in an andesite with moderate pervasive sericite alteration at the contact with a porphyritic felsic dike.

OSK-W-18-1104-W1 intersected 6.52 g/t Au over 2.0 metres in Lynx. Mineralization consists of up to 1% pyrite in quartz-carbonate crustiform veins and 7% pyrite stringers with pervasive silica flooding. The host is a strong silica and moderate sericite altered fragmental felsic intrusion.

OSK-W-18-1139-W1 intersected five intervals in Underdog: 26.4 g/t Au over 2.3 metres, 38.9 g/t Au over 13.7 metres, 47.8 g/t Au over 2.3 metres, 6.90 g/t Au over 2.0 metres and 27.7 g/t Au over 4.4 metres. The first interval contains up to 15% pyrite stringers within a strongly silicified and sericitized porphyritic felsic dike. The other four intervals all contain local visible gold and up to 7% pyrite within pervasive silica flooding hosted in a moderate to strong sericite and silica altered porphyritic felsic dike.

OSK-W-18-1598-W1 intersected 51.5 g/t Au over 2.0 metres in Lynx. Mineralization consists of local visible gold within pervasive silica flooding and 10% pyrite at the border of a quartz-tourmaline-carbonate crustiform vein. The host is a strong pervasive silica and moderate carbonate altered gabbro with tourmaline veins.

OSK-W-18-1741-W1 intersected 14.0 g/t Au over 2.3 metres in Lynx. Mineralization consists of local visible gold, 2% pyrite with tourmaline infilling fractures within pervasive silica flooding in a moderate to strong silica and sericite altered gabbro.

OSK-W-18-1748 intersected 4.23 g/t Au over 2.0 metres in Lynx. Mineralization consists of traces disseminated and stringer pyrite in a porphyritic felsic dike with tourmaline and moderate chlorite, sericite, silica and carbonate alteration.

OSK-W-18-1756 intersected 53.0 g/t Au over 2.5 metres and 6.72 g/t Au over 2.0 metres in Lynx. The first interval contains local visible gold, up to 8% disseminated pyrite or in stringers with tourmaline and trace chalcopyrite within a weak silica altered rhyolite with local strong carbonate alteration and breccia texture. The second interval contains 3% pyrite with pervasive silica flooding and quartz-tourmaline veinlets within a weak sericite altered rhyolite.

OSK-W-18-1759 intersected 3.80 g/t Au over 2.0 metres in Lynx. Mineralization consists of local visible gold and 7% pyrite with pervasive silica flooding hosted in a moderate sericite and silica altered rhyolite.

OSK-W-18-1760 intersected 3.74 g/t Au over 2.0 metres and 16.9 g/t Au over 8.5 metres in Lynx. The first interval contains 4% pyrite clusters and stringers, mostly as a stockwork within a moderate sericite, weak silica and fuchsite altered gabbro. The second interval contains local visible gold, up to 10% disseminated pyrite and 1% sphalerite within a strong pervasive silica and moderate sericite altered fragmental felsic intrusion.

OSK-W-18-1765 intersected four intervals in Lynx: 3.16 g/t Au over 2.3 metres, 9.84 g/t Au over 2.0 metres, 60.3 g/t Au over 2.0 metres and 7.41 g/t Au over 2.4 metres. The first and second intervals contain 1% pyrite stringers and 1% pyrite fragments in a sericitized porphyritic felsic intrusion. The third interval contains local visible gold and 4% pyrite with pervasive silica flooding within a strong silica, weak fuchsite and sericite altered porphyritic felsic dike. The fourth interval contains up to 5% pyrite stringers and quartz veins with pervasive silica flooding hosted in weak sericite altered rhyolite.

OSK-W-18-1767 intersected 3.67 g/t Au over 2.0 metres in Caribou. Mineralization consists of 3% pyrite stringers and 1% pyrite clusters hosted in a sericite and silica altered porphyritic felsic intrusion.

OSK-W-18-1768 intersected seven intervals in Lynx: 3.65 g/t Au over 2.0 metres, 13.0 g/t Au over 3.4 metres, 4.49 g/t Au over 2.0 metres, 161 g/t Au over 4.3 metres, 22.1 g/t Au over 2.5 metres, 74.4 g/t Au over 2.0 metres and 8.06 g/t Au over 2.3 metres. The first interval contains up to 10% pyrite stringers at the contact between a weak fuchsite and sericite altered gabbro and a rhyolite. The second interval contains local visible gold, 1% disseminated and stringer pyrite and trace sphalerite within pervasive silica flooding located at the contact between a fuchsite altered gabbro and a sericitized rhyolite. The third interval contains trace pyrite-silica flooding and tourmaline veins within a strong sericite, moderate carbonate and silica altered porphyritic felsic intrusion. The fourth interval contains local visible gold with strong pervasive silica flooding and 1% pyrite stringers hosted in a silica altered porphyritic felsic dike. The fifth and sixth intervals contain local visible gold, 2% pyrite stringers and 1% disseminated pyrite within pervasive silica flooding and hosted in sericite, fuchsite and silica altered rhyolite. The last interval contains 1% disseminated pyrite and trace sphalerite with crustiform veins hosted in sericite, silica and fuchsite altered gabbro.

OSK-W-18-1770 intersected five intervals in Lynx: 96.9 g/t Au over 2.6 metres, 11.1 g/t Au over 3.0 metres, 19.0 g/t Au over 2.5 metres, 30.2 g/t Au over 2.2 metres and 32.0 g/t Au over 5.1 metres. The first interval contains traces of pyrite stringers within a sheared and sericite altered andesite. The second interval contains traces of pyrite fragments within a sericite altered gabbro. The third interval contains local visible gold and 5% disseminated pyrite within pervasive silica flooding and hosted in a strong biotite altered rhyolite. The fourth interval contains local visible gold and 3% disseminated pyrite with pervasive silica flooding and fuchsite alteration hosted in a strong silica, biotite and sericite altered rhyolite. The last interval contains local visible gold and up to 7% disseminated and stringer pyrite and with pervasive silica flooding hosted in a silica, fuchsite and biotite altered rhyolite.

OSK-W-18-1771 intersected 6.83 g/t Au over 2.2 metres in Caribou. Mineralization consists of 5% pyrite clusters and 5% disseminated pyrite within a strong fault zone hosted in a silicified and sericitized rhyolite.

OSK-W-18-1772 intersected three intervals in Lynx: 19.1 g/t Au over 2.1 metres, 31.3 g/t Au over 2.1 metres and 11.9 g/t Au over 2.0 metres. The first interval contains 1% pyrite stringers hosted in moderate silica and sericite altered rhyolite. The second interval contains 1% disseminated and stringer pyrite and up to 2% sphalerite with pervasive silica flooding hosted at a sericite, silica and fuchsite altered contact between a felsic intrusion and a rhyolite. The third interval contains 1% disseminated and clustered pyrite and ptygmatic tourmaline veins within a moderate sericite, carbonates and fuchsite altered rhyolite.

WST-18-0017 intersected 12.8 g/t Au over 2.4 metres in Zone 27. Mineralization consists of 1% disseminated pyrite and stringers within a moderate sericite and silica altered andesite.

WST-18-0024 intersected 26.5 g/t Au over 2.4 metres in Mallard. Mineralization consists of disseminated pyrite with a crustiform vein hosted in weak sericite altered andesite.

Qualified Person

Quality Control and Reporting Protocols

About the Windfall Lake Gold Deposit

The Windfall Lake gold deposit is located between Val-d’Or and Chibougamau in the Abitibi region of Québec, Canada. The mineral resource defined by Osisko, as disclosed in the Windfall Lake Technical Report (as defined below) and November 27, 2018 Lynx resource update, comprises 2,874,000 tonnes at 8.17 g/t Au (754,000 ounces) in the indicated mineral resource category and 10,352,000 tonnes at 7.11 g/t Au (2,366,000 ounces) in the inferred mineral resource category. For details regarding the key assumptions, parameters and methods used to estimate the mineral resources presented in respect of the Windfall Lake gold project, please see the technical report entitled “Technical Report and Mineral Resource Estimate for the Windfall Lake Project, Windfall Lake and Urban-Barry Properties” and dated June 12, 2018 (effective date of May 14, 2018), which has been prepared by InnovExplo Inc. from Val-d’Or, Québec (the “Windfall Lake Technical Report”) and the press release “Osisko Releases Mineral Resource Update for Lynx” dated November 27, 2018, which has been prepared by Osisko and reviewed and approved by Micon International, Ltd. from Toronto, Ontario. The Windfall Lake Technical Report and press release are available on Osisko’s website at www.osiskomining.com and on SEDAR under Osisko’s issuer profile at www.sedar.com. The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. Mineralization occurs in four principal zones: Lynx, Zone 27, Caribou and Underdog. All zones comprise sub-vertical lenses following intrusive porphyry contacts plunging to the northeast. The deposit is well defined from surface to a depth of 900 metres and remains open along strike and at depth. Mineralization has been identified 30 metres from surface in some areas and as deep as 2,000 metres in others, with significant potential to extend mineralization down-plunge and at depth.

About Osisko Mining Inc.

Cautionary Note Regarding Forward-Looking Information

For further information please contact:

John Burzynski
President and Chief Executive Officer

Telephone: (416) 363-8653

OSISKO RELEASES MINERAL RESOURCE UPDATE FOR LYNX

Posted on November 27, 2018November 8, 2023 by Yannick Fradette

Grade and Ounces Increase with Infill Drilling

(Toronto, November 27, 2018) Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to provide an update on the Lynx zone mineral resource estimate at its 100% owned Windfall Project, located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Highlights include:

Grade increase in Lynx indicated resource to 8.13 g/t Au
Grade increase in Lynx inferred resource to 9.70 g/t Au
Addition of 153,000 ounces to Lynx indicated resource
Addition of 82,000 ounces to Lynx inferred resource
Global Windfall indicated resource increases to 754,000 oz Au averaging 8.17 g/t Au
Global Windfall inferred resource increases to 2,366,000 oz Au averaging 7.11 g/t Au

Table 1: Updated mineral resource estimate for Lynx compared to the mineral resource estimate for this zone outlined in Osisko’s press release dated May 14, 2018 (3.0 g/t Au cut-off)

Zone	Indicated			Inferred
Zone	Tonnes ⁽¹⁾	Grade (g/t)	Ounces Au ⁽¹⁾	Tonnes ⁽¹⁾	Grade (g/t)	Ounces Au ⁽¹⁾
Lynx – Nov 2018	1,746,000	8.13	456,000	2,005,000	9.70	625,000
Lynx – May 2018	1,254,000	7.51	303,000	2,257,000	7.48	543,000
Change	+492,000	+0.62	+153,000	-252,000	+2.22	+82,000

Note: (1) Values are rounded to nearest thousand which may cause apparent discrepancies.

The updated mineral resource estimate includes 138 infill drill holes (107,366 metres) completed in the Lynx resource area by Osisko between March 6, 2018 and October 27, 2018. In total, the updated mineral resource estimate includes 613 holes (370,714 metres) drilled in the Lynx zone by Osisko since 2017. Conversion drilling (from inferred category to indicated category) continues at the Windfall deposit on all zones (Zone 27, Caribou, Underdog, and Lynx). The complete Windfall mineral resource estimate update is scheduled for release in 2019 upon the completion of the ongoing infill drilling program.

John Burzynski, President and Chief Executive Officer commented: “We are very pleased with the updated mineral resource estimate on Lynx. Our work has positively demonstrated that conversion of inferred resources to indicated resources, and infilling in general, is resulting in higher average grades and is adding ounces. Osisko’s Lynx discovery now represents over one million ounces of the global resource, and we are confident that as we complete the infill drilling we will continue to see the average indicated grade move up. The higher grades and additional ounces shown in today’s updated resource will also have a strong positive effect on the robust Windfall PEA released in July 2018.”

Additionally he noted: “We now have a very significant global resource between Windfall (2,874,000 tonnes averaging 8.17 g/t Au for 754,000 indicated ounces gold, and 10,352,000 tonnes averaging 7.11 g/t Au for 2,366,000 inferred ounces gold) and Osborne Bell (2,587,000 tonnes averaging 6.13 g/t Au for 510,000 ounces gold inferred). The Windfall intrusive-related gold system remains open along strike and at depth. Lynx and several of the other known zones have excellent down plunge potential to add mineral resources, and as we progress with our 800,000 metre drill program we expect to continue expanding Windfall. Today’s positive results will be followed up by further grade confirmation work, including the initial results from our bulk sampling of Zone 27, which is on schedule to be released before the end of December 2018. We are also continuing with deep drilling on our Triple 8 discovery, and anticipate news from the current hole in progress by the end of January 2019. Osisko remains well financed as one of the most aggressive gold explorers in the business.”

The updated mineral resource estimate for Lynx was prepared by Osisko and reviewed and audited by Micon International Limited, Toronto, Ontario. The interim update used the same methodology (key assumptions, parameters and methods) as the Windfall Lake Technical Report (as defined below), which is available on SEDAR (www.sedar.com) under Osisko’s issuer profile. Infill drilling focused primarily on zones above 500 metres. Additional but limited infill drilling was also completed on zones below 500 metres. A total of 37 wireframes were updated and two new wireframes created for the interim estimate with a minimum true thickness of 2.0 metres. Wireframes in Lynx were updated and created using the same geological model of intrusive-related systems where mineralized zones are closely associated with sub-volcanic quartz-feldspar porphyries as previously used.

Average grades for indicated and inferred resources are weighted averages of indicated and inferred classified blocks from all 39 different sized wireframes. The increase in indicated resources was expected as infill holes continue to intersect high grade zones and improve continuity. The grade increase in inferred is due to the overall grade increase from additional holes in five wireframes representing approximately 75% of the inferred ounces. The estimate only considers mineralized zones potentially minable by underground methods at a lower cut-off grade of 3.0 g/t Au. The cut-off calculation is based on the assumed parameters listed below:

Table 2: Parameters used for Resource Estimate

Parameters	Unit	Value
Gold Price	US$/oz	1,300
Exchange Rate	US$/C$	1.28
Mill Recovery	%	90
Sell Cost	C$/oz	5
Royalties	%	2.5
Mining Cost	C$/T milled	70
G&A Cost	C$/T milled	18
Processing Cost	C$/T milled	30
Transportation	C$/T milled	18
Environment	C$/T milled	3
Calculated Cut-off Grade	Au g/t	2.96

Table 3: Windfall Mineral Resource Estimate with Lynx update.

Zone	Indicated			Inferred
Zone	Tonnes ⁽¹⁾	Grade (g/t)	Ounces Au ⁽¹⁾	Tonnes ⁽¹⁾	Grade (g/t)	Ounces Au ⁽¹⁾
Lynx	1,746,000	8.13	456,000	2,005,000	9.70	625,000
Zone 27	628,000	8.69	175,000	852,000	7.28	199,000
Caribou	318,000	7.12	73,000	2,767,000	5.80	516,000
Underdog	147,000	9.00	43,000	4,380,000	6.77	953,000
Other	34,000	6.58	7,000	348,000	6.37	71,000
Total	2,874,000	8.17	754,000	10,352,000	7.11	2,366,000

Windfall Gold Deposit Mineral Resource Estimate Notes

The Windfall mineral resource estimate has been prepared in accordance with Canadian Institute of Mining, Metallurgy and Petroleum’s standards and guidelines for reporting mineral resources and mineral reserves.
Resources are presented undiluted and in situ and are considered to have reasonable prospects for economic extraction.
The database comprised a total of 1,591 drill holes for 704,099 metres of drilling in the extent of the mineral resource, of which 950 drill holes (521,058 metres) were completed and assayed by Osisko as of October 27, 2018, on approximate grid of 25 metre x 25 metre (infill drilling) and larger grid for extension drilling.
All NQ core assays reported by Osisko were obtained by analytical methods described below under “Quality Control and Reporting Protocols”.
Geological interpretation of the deposits was based on lithologies, mineralized shears and the observation that most mineralized domains occur at the contact of porphyry dykes and volcanic host rocks. Interpretation was initially made from cross-sections at 50 metre intervals, and then completed in Leapfrog, a modelling software, where selections of mineralization intervals were combined to generate mineralization wireframes. Domains are subvertical, strike NE-SW and plunge approximately 30 degrees towards the North-East.
The mineral resource estimate encompasses a total of 126 tabular, sub-vertical gold-bearing domains each defined by individual wireframes with a minimum true thickness of 2.0 metres.
Samples were composited within the mineralization domains into 2.0 metre length composites. A value of zero grade was applied in cases of core not assayed.
High grade capping was done on composite data, and established using a statistical analysis on a per-zone basis for gold. Capping varied from 15 g/t Au to 75 g/t Au and was applied using a four-step capping strategy where capping values decreased as interpolation distances increased.
Density values were applied on the following lithological basis (t/m3): mafic volcanic host rocks varied from 2.78 to 2.86; felsic volcanic host rocks varied from 2.76 to 2.77; porphyries varied from 2.70 to 2.83.
Ordinary Kriging (OK) based interpolation was used for the estimation of all zones of the Windfall gold deposit except for the Underdog zone where an Inverse Distance Squared (ID2) interpolation was preferred due to the larger drill spacing and smaller density of drill holes informing the mineralization wireframes. All estimates are based on a block dimension of 5 metres NE, 2 metres NW and 5 metres height and estimation parameters determined by variography.
The Windfall mineral resource estimate is categorized as indicated mineral resource and inferred mineral resource as follows:
- The Indicated mineral resource category is manually defined and encloses areas where drill spacing is generally less than 25 metres, blocks are informed by a minimum of three drill holes, and reasonable geological and grade continuity is shown.
- The Inferred mineral resource category is manually defined and encloses areas where drill spacing is less than 100 metres, blocks are informed by a minimum of two drill holes, and reasonable, but not verified, geological and grade continuity is observed.
Estimates use metric units (metres, tonnes and g/t). Metal contents are presented in troy ounces (metric tonne x grade / 31.10348).
Micon International Limited is not aware of any known environmental, permitting, legal, title-related, taxation, socio-political or marketing issues, or any other relevant issue not reported in the technical report, that could materially affect the mineral resource estimate.
These mineral resources are not mineral reserves as they do not have demonstrated economic viability. The quantity and grade of reported Inferred resources in this Mineral Resource Estimate are uncertain in nature and there has been insufficient exploration to define these Inferred resources as Indicated or Measured, It is reasonably expected that the majority of Inferred Mineral Resources could be upgraded to Indicated Mineral Resources with continued exploration.

Qualified Persons

The updated mineral resource estimate on the Lynx zone, with an effective date of November 27, 2018, was (i) prepared by Judith St-Laurent, P.Geo (OGQ #1023)., B.Sc.,of Osisko Mining and (ii) reviewed and approved by Charley Murahwi, M.Sc, P.Geo., FAusIMM, each of whom is a “qualified person” within the meaning of National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101“). Mr. Murahwi is an employee of Micon International Limited and is considered to be “independent” of Osisko for purposes of section 1.5 of NI 43-101.

The scientific and technical content in this press release has been reviewed and approved by Mr. Mathieu Savard, P.Geo (OGQ #510), Vice President Exploration (Québec) of Osisko, who is a “qualified person” within the meaning of NI 43-101.

Quality Control and Reporting Protocols

True widths determinations are estimated at 65-80% of the reported core length intervals for most of the zones. Assays are uncut except where indicated. Intercepts occur within geological confines of major zones but have not been correlated to individual vein domains at this time. Reported intervals include minimum weighted averages of 3.0 g/t Au diluted over core lengths of at least 2.0 metres. All NQ core assays reported were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at (i) ALS Laboratories in Val d’Or, Québec, Thunder Bay, Ontario, Sudbury, Ontario or Vancouver, British Colombia, or (ii) Bureau Veritas in Timmins, Ontario. The 1-kilogram screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. Selected samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS Laboratories. Drill program design, Quality Assurance/Quality Control (“QA/QC”) and interpretation of results is performed by qualified persons employing a QA/QC program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for QA/QC purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assay.

Cautionary Statements Regarding Estimates of Mineral Resources

This press release uses the terms measured mineral resource, indicated mineral resource and inferred mineral resource as a relative measure of the level of confidence in the mineral resource estimate. Readers are cautioned that mineral resources are not mineral reserves and that the economic viability of resources that are not mineral reserves has not been demonstrated. The estimate of mineral resources may be materially affected by geology, environmental, permitting, legal, title, socio-political, marketing or other relevant issues It is reasonably expected that the majority of Inferred Mineral Resources could be upgraded to Indicated Mineral Resources with continued exploration. The mineral resource estimate is classified in accordance with the Canadian Institute of Mining, Metallurgy and Petroleum’s “CIM Definition Standards on Mineral Resources and Mineral Reserves” incorporated by reference into NI 43-101. Under NI 43-101, estimates of inferred mineral resources may not form the basis of a feasibility or pre-feasibility study or economic analysis of mineral resources, except for a “preliminary economic assessment” as defined under NI 43-101. Readers are cautioned not to assume that further work on the stated mineral resources will lead to mineral reserves that can be mined economically.

About Osisko Mining Inc.

Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% interest in the high-grade Windfall Lake gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quevillon area (over 3,300 square kilometres), a 100% interest in the Marban project located in the heart of Québec’s prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Garrison property. The Corporation also holds interests and options in a number of additional properties in northern Québec and Ontario.

About the Windfall Lake Gold Deposit

The Windfall Lake gold deposit is located between Val-d’Or and Chibougamau in the Abitibi region of Québec, Canada. The mineral resource defined by Osisko, as disclosed in the Windfall Lake Technical Report (as defined below), comprises 2,382,000 tonnes at 7.85 g/t Au (601,000 ounces) in the indicated mineral resource category and 10,605,000 tonnes at 6.70 g/t Au (2,284,000 ounces) in the inferred mineral resource category. For details regarding the key assumptions, parameters and methods used to estimate the mineral resources presented in respect of the Windfall Lake gold project, please see the technical report entitled “Technical Report and Mineral Resource Estimate for the Windfall Lake Project, Windfall Lake and Urban-Barry Properties” and dated June 12, 2018 (effective date of May 14, 2018), which has been prepared by InnovExplo Inc. from Val-d’Or, Québec (the “Windfall Lake Technical Report”). The Windfall Lake Technical Report is available on Osisko’s website at www.osiskomining.com and on SEDAR under Osisko’s issuer profile at www.sedar.com). The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. Mineralization occurs in four principal zones: Lynx, Zone 27, Caribou and Underdog. All zones comprise sub-vertical lenses following intrusive porphyry contacts plunging to the northeast. The deposit is well defined from surface to a depth of 900 metres and remains open along strike and at depth. Mineralization has been identified 30 metres from surface in some areas and as deep as 2000 metres in others, with significant potential to extend mineralization down-plunge and at depth.

Cautionary Note Regarding Forward-Looking Information

This press release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this press release. The information in this press release about the Windfall Lake gold deposit being one of the highest grade resource-stage gold projects in Canada; the Windfall Lake gold deposit being a world-class gold system; the significance of the updated mineral resource estimate for Lynx; the timing and ability, if at all, for Osisko to complete an updated mineral resource estimate for Windfall; the timing and ability of Osisko to complete its ongoing infill drilling program; Osisko’s ability, if at all, to positively convert inferred mineral resources to indicated mineral resources; any increase in grade that could result from the conversion of inferred mineral resources to indicated mineral resources; the effect of higher grades on the mineral resource outlined in the Windfall Technical Report; results of bulk sampling on Zone 27; timing and ability, if at all, for Osisko to release an update on Zone 27 by the end of December 2018; results of deep drilling on Triple 8 discovery; timing and ability, if at all, for Osisko to release information on current hole in progress by the end of January 2019; the significance, if any, of new results from the ongoing deep-hole drill/exploration program at the Windfall Lake gold project; potential depth extensions of the Lynx and Underdog mineralized zones; the potential, if any of the Deep Underdog and Deep Lynx zones; the type and extend of drilling on the Deep Underdog and Deep Lynx zones; the success of Osisko’s deep-hole drill/exploration program at the Windfall Lake gold project, if any; the down-plunge projection of the gold mineralized structures; the current 800,000 metre drill program; the type of drilling included in the drill program; potential mineralization; the potential to extend mineralization up and down-plunge and at depth at the Windfall Lake gold deposit; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities, including the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation at the time such assumptions and estimates were made, and involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this press release is based upon what management believes, or believed at the time, to be reasonable assumptions. Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information, Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

CONTACT INFORMATION:

John Burzynski
President & Chief Executive Officer
(416) 363-8653

OSISKO INTERSECTS 83.9 g/t Au OVER 5.3 METRES AT LYNX

Posted on November 21, 2018November 8, 2023 by Yannick Fradette

Resource Update on Schedule

(Toronto, November 21, 2018) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new infill drilling results from the ongoing drill definition and expansion program at its 100% owned Windfall Lake gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec. The 800,000 metre drill program commenced in late 2015. The program is currently focussed on infill drilling within the main Windfall gold deposit and the adjacent Lynx deposit (located immediately NE of Windfall), exploration and expansion drilling on the main mineralized zones, and deep exploration in the central areas of the intrusive system. Significant new analytical results from 53 intercepts in 23 drill holes and 6 wedges focused on infill drilling are presented below.

The database for the Lynx interim resource update was closed on October 27^th, 2018. Results are on schedule to be released prior to the end of the month. This interim resource update is focused on the Lynx zones above 500 metres, and was planned in May 2018 as a follow-up to demonstrate the results of infill drilling on the May 2018 preliminary resource estimate (see Osisko press release dated May 14, 2018). The complete Windfall resource is scheduled for release in 2019 upon the completion of the ongoing infill drilling program.

Bulk sampling in Zone 27 is also progressing, with over 1,000 tonnes of sample material already shipped to the custom processing facility in Ontario. Preliminary results from Zone 27 bulk sampling are also on schedule to be available before the end of December.

Highlights from today’s new infill drilling results include: 83.9 g/t Au over 5.3 metres and 89.3 g/t Au over 2.4 metres in OSK-W-18-1731; 56.3 g/t Au over 3.3 metres in OSK-W-18-1728-W1; 29.3 g/t Au over 2.9 metres in OSK-W-18-1738; 27.2 g/t Au over 2.6 metres in OSK-W-18-1508; 23.7 g/t Au over 2.9 metres in OSK-W-18-1754 and 13.5 g/t Au over 4.7 metres in OSK-W-18-1762. Maps showing hole locations and full analytical results are available at www.osiskomining.com.

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Type	Mineralized zone
OSK-W-18-1508	214.0	217.0	3.0	18.3		Infill	Lynx
including	214.0	214.7	0.7	74.4		Infill	Lynx
	224.3	226.5	2.2	25.3		Infill	Lynx
including	224.9	225.5	0.6	85.3		Infill	Lynx
	231.2	233.8	2.6	27.2		Infill	Lynx
	241.0	247.5	6.5	5.31		Infill	Lynx
OSK-W-18-1558-W1	346.5	352.0	5.5	4.48		Infill	Zone 27
	373.0	375.0	2.0	4.30		Infill	Zone 27
	379.0	383.0	4.0	3.06		Infill	Zone 27
	385.8	388.5	2.7	4.79		Infill	Zone 27
OSK-W-18-1674	279.5	281.5	2.0	3.10		Infill	Caribou
including	280.5	280.8	0.3	19.7		Infill	Caribou
	315.5	317.5	2.0	5.10		Infill	Caribou
including	316.3	316.6	0.3	29.9		Infill	Caribou
OSK-W-18-1689	123.0	125.0	2.0	3.72		Infill	Caribou
including	123.7	124.0	0.3	23.8		Infill	Caribou
OSK-W-18-1702	56.0	58.0	2.0	15.4		Infill	Caribou
OSK-W-18-1721	303.3	305.6	2.3	4.46		Infill	Caribou
OSK-W-18-1725	377.8	380.2	2.4	9.73		Infill	Lynx
including	378.1	379.1	1.0	22.0		Infill	Lynx
OSK-W-18-1728	455.0	457.0	2.0	4.89		Infill	Lynx
OSK-W-18-1728-W1	467.6	470.9	3.3	56.3	36.1	Infill	Lynx
including	468.7	469.4	0.7	196	100	Infill	Lynx
	489.6	491.7	2.1	9.83		Infill	Lynx
including	489.6	490.0	0.4	47.2		Infill	Lynx
OSK-W-18-1731	555.0	557.4	2.4	89.3	73.3	Infill	Lynx
including	556.3	557.4	1.1	135	100	Infill	Lynx
	585.2	590.5	5.3	83.9	35.5	infill	Lynx
including	586.4	587.0	0.6	456	100	infill	Lynx
OSK-W-18-1734	252.7	255.0	2.3	3.02		Infill	Lynx
OSK-W-18-1735	86.7	91.0	4.3	6.54		Infill	Caribou
including	90.3	91.0	0.7	18.3		Infill	Caribou
	117.0	119.0	2.0	5.20		Infill	Caribou
	278.0	280.1	2.1	5.40		Infill	Zone 27
OSK-W-18-1738	299.6	303.1	3.5	7.99		Infill	Lynx
	350.9	353.8	2.9	29.3	16	Infill	Lynx
including	351.2	351.5	0.3	229	100	Infill	Lynx
OSK-W-18-1739	516.0	518.0	2.0	13.0		Infill	Lynx
including	517.3	517.6	0.3	83.6		Infill	Lynx
OSK-W-18-1741-W1	445.0	447.5	2.5	9.72		Infill	Lynx
including	446.2	446.7	0.5	47.0		Infill	Lynx
	498.7	502.0	3.3	5.13		Infill	Lynx
OSK-W-18-1742	230.0	232.0	2.0	9.64		Infill	Caribou
OSK-W-18-1743-W1	424.0	426.3	2.3	6.46		Lynx	Lynx
including	425.2	425.8	0.6	17.4		Lynx	Lynx
	481.1	484.1	3.0	18.6	18.3	Infill	Lynx
including	483.6	484.1	0.5	102	100	Infill	Lynx
	489.0	491.1	2.1	3.35		Infill	Lynx
OSK-W-18-1744	507.1	509.5	2.4	8.38		Infill	Lynx
including	507.1	507.7	0.6	29.6		Infill	Lynx
OSK-W-18-1744-W1	527.8	532.3	4.5	9.71		Infill	Lynx
including	527.8	528.1	0.3	55.6		Infill	Lynx
OSK-W-18-1745	386.0	388.0	2.0	20.4		Infill	Lynx
including	387.4	388.0	0.6	67.2		Infill	Lynx
	450.9	452.9	2.0	13.0		Infill	Lynx
including	451.2	452.2	1.0	25.4		Infill	Lynx
	470.0	472.3	2.3	7.05			Vein
including	471.2	471.9	0.7	22.9			Vein
OSK-W-18-1746	454.0	456.1	2.1	3.23		Infill	Lynx
OSK-W-18-1747-W1	505.5	507.5	2.0	3.78		Infill	Zone 27
OSK-W-18-1750	172.1	174.3	2.2	20.0		Infill	Lynx
	198.2	200.6	2.4	6.10		Infill	Lynx
	229.4	231.8	2.4	6.27		Infill	Lynx
	251.0	253.3	2.3	5.67		Infill	Lynx
including	252.3	252.8	0.5	24.9		Infill	Lynx
OSK-W-18-1754	168.0	170.9	2.9	23.7		Infill	Lynx
	188.0	190.0	2.0	5.28		Infill	Lynx
including	189.0	189.5	0.5	20.8		Infill	Lynx
	208.0	210.0	2.0	22.9		Infill	Lynx
including	208.8	209.5	0.7	64.1		Infill	Lynx
	222.8	225.0	2.2	3.19		Infill	Lynx
including	222.8	223.1	0.3	17.6		Infill	Lynx
	237.0	239.7	2.7	3.93		Infill	Lynx
including	238.1	238.8	0.7	12.4		Infill	Lynx
OSK-W-18-1758	64.8	68.0	3.2	5.96		Infill	Zone 27
including	67.1	68.0	0.9	15.5		Infill	Zone 27
OSK-W-18-1762	229.5	234.2	4.7	13.5		Infill	Lynx
including	229.5	230.0	0.5	89.0		Infill	Lynx
OSK-W-18-1763	203.0	205.4	2.4	7.75		Infill	Caribou
WST-18-0004	160.7	163.0	2.3	13.0		Infill	Zone 27
including	160.7	161.2	0.5	58.8		Infill	Zone 27
WST-18-0006	77.0	79.0	2.0	8.80		Infill	Zone 27
including	78.1	78.5	0.4	35.7		Infill	Zone 27

Note: True widths are estimated at 65 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below.

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation (m)	Section
OSK-W-18-1508	331	-57	282	453346	5434954	397	3475
OSK-W-18-1558-W1	316	-47	450	452464	5434663	403	2575
OSK-W-18-1674	345	-45	378	452102	5434436	401	2150
OSK-W-18-1689	150	-54	135	452177	5434814	401	2400
OSK-W-18-1702	330	-50	534	452418	5434561	399	2475
OSK-W-18-1721	332	-49	630	452510	5434500	400	2525
OSK-W-18-1725	340	-54	399	453418	5434901	396	3525
OSK-W-18-1728	138	-54	507	453468	5435417	399	3825
OSK-W-18-1728-W1	145	-51	669	453468	5435417	399	3825
OSK-W-18-1731	139	-51	611	453383	5435518	409	3800
OSK-W-18-1734	338	-67	360	453461	5435038	396	3625
OSK-W-18-1735	323	-45	327	452394	5434680	400	2525
OSK-W-18-1738	329	-69	393	453460	5434986	396	3600
OSK-W-18-1739	125	-55	594	453133	5435354	416	3500
OSK-W-18-1741-W1	144	-48	528	453328	5435466	406	3725
OSK-W-18-1742	335	-56	462	452320	5434588	401	2400
OSK-W-18-1743-W1	140	-45	558	453331	5435395	402	3700
OSK-W-18-1744	134	-48	599	453450	5435484	394	3825
OSK-W-18-1744-W1	134	-48	594	453450	5435484	394	3825
OSK-W-18-1745	134	-51	486	453218	5435347	400	3575
OSK-W-18-1746	142	-53	510	453280	5435389	398	3650
OSK-W-18-1747-W1	333	-54	558	452463	5434683	395	2575
OSK-W-18-1750	333	-52	315	453379	5434949	389	3500
OSK-W-18-1754	332	-53	264	453338	5434947	390	3475
OSK-W-18-1758	160	-45	138	451941	5434725	402	2150
OSK-W-18-1762	332	-58	254	453323	5434955	397	3475
OSK-W-18-1763	330	-51	234	452863	5434972	407	3075
WST-18-0004	112	-56	196	452383	5435015	277	2675
WST-18-0006	136	-44	114	452383	5435013	277	2675

OSK-W-18-1508 intersected four intervals in Lynx: 18.3 g/t Au over 3.0 metres, 25.3 g/t Au over 2.2 metres, 27.2 g/t Au over 2.6 metres and 5.31 g/t Au over 6.5 metres. The first interval contains 2% pyrite with intense pervasive silica flooding hosted in a strongly silicified, moderately sericitized and lightly bleached felsic porphyritic dike. The second and third intervals contain local visible gold and 1% pyrite with pervasive silica flooding in a silicified rhyolite. The fourth interval contains trace pyrite with pervasive silica flooding in a strongly silicified and moderately sericitized rhyolite.

OSK-W-18-1558-W1 intersected 4.48 g/t Au over 5.5 metres, 4.30 g/t Au over 2.0 metres, 3.06 g/t Au over 4.0 metres and 4.79 g/t Au over 2.7 metres in Zone 27. The first interval contains local visible gold in ptygmatic pyrite-tourmaline veinlets, 2% pyrite stringers and 1% disseminated pyrite hosted in a bleached andesite. The other intervals are composed of up to 3% pyrite stringers and trace disseminated pyrite hosted in a bleached andesite and felsic porphyritic intrusion.

OSK-W-18-1674 intersected 3.10 g/t Au over 2.0 metres and 5.10 g/t Au over 2.0 metres in Caribou. Mineralization consists of up to 20% pyrite-tourmaline stringers, tourmaline ptygmatic veinlets with strong and patchy silica alteration in a moderate sericite altered rhyolite.

OSK-W-18-1689 intersected 3.72 g/t Au over 2.0 metres in Caribou. Mineralization is composed of trace pyrite-tourmaline stringers and disseminated pyrite within a sericite, chlorite and carbonate altered rhyolite.

OSK-W-18-1702 intersected 15.4 g/t Au over 2.0 metres in Caribou. Mineralization consists of 3% pyrite clusters and 2% disseminated pyrite hosted in an andesite with moderate hematite alteration.

OSK-W-18-1721 intersected 4.46 g/t Au over 2.3 metres in Caribou. Mineralization is composed of 5% pyrite stringers and 1% disseminated pyrite hosted in a strongly faulted, moderately sericitized and silicified rhyolite.

OSK-W-18-1725 intersected 9.73 g/t Au over 2.4 metres in Lynx. Mineralization is composed of a crustiform vein with 3% pyrite, trace disseminated sphalerite and 2% pyrite-tourmaline stringers with local fuchsite alteration hosted in a gabbro.

OSK-W-18-1728 intersected 4.89 g/t Au over 2.0 metres in Lynx. Mineralization includes 1% pyrite with pervasive silica flooding, pyrite clusters and quartz-tourmaline veins at the contact between a rhyolite and a gabbro.

OSK-W-18-1728-W1 intersected 56.3 g/t Au over 3.3 metres and 9.83 g/t Au over 2.1 metres in Lynx. The first interval contains local visible gold, 3% pyrite clusters, and trace disseminated sphalerite and chalcopyrite with pervasive silica flooding hosted in a strong silica and weak fuchsite altered felsic intrusion. The second interval contains 1% pyrite with pervasive silica flooding, 1% disseminated pyrite, and quartz-tourmaline veins hosted in a moderate sericite and silica altered rhyolite.

OSK-W-18-1731 intersected 89.3 g/t Au over 2.4 metres and 83.9 g/t Au over 5.3 metres in Lynx. The first interval contains local visible gold, 1% disseminated pyrite, 2% pyrite stringers in fracture filling, and 1% sphalerite with pervasive silica flooding hosted in a moderate sericite and strong silica altered felsic porphyritic dike. The second interval contains local visible gold, trace sphalerite with pervasive silica flooding and quartz veins, 1% pyrite stringers and trace pyrite in quartz-tourmaline veins hosted in a moderate fuchsite altered, strong sericite and silica altered gabbro.

OSK-W-18-1734 intersected 3.02 g/t Au over 2.3 metres in Lynx. Mineralization is composed of 2% pyrite stringers and 1% pyrite with pervasive silica flooding in a silicified fragmental felsic dike.

OSK-W-18-1735 intersected three intervals: 6.54 g/t Au over 4.3 metres, 5.20 g/t Au over 2.0 metres in Caribou and 5.40 g/t Au over 2.1 metres in Zone 27. The first and second intervals contain up to 5% pyrite stringers and clusters with trace sphalerite hosted in moderately silicified, sericitized and bleached porphyritic felsic dike. The third interval contains 2% disseminated pyrite, 1% pyrite-tourmaline stringers, 5% pyrite with pervasive silica flooding and trace sphalerite in a sericitized and chloritized porphyritic felsic dike.

OSK-W-18-1738 intersected 7.99 g/t Au over 3.5 metres, and 29.3 g/t Au over 2.9 metres in Lynx. The first interval contains 3% pyrite with pervasive silica flooding, 1% disseminated or stringer pyrite or hosted in a sericitized and silicified porphyritic felsic dike. The second interval contains local visible gold, locally 20% pyrite with pervasive silica flooding, 7% disseminated pyrite, up to 7% pyrite in crustiform veins and 2% disseminated sphalerite hosted in a bleached, sericitized, silicified and fuchsite altered gabbro.

OSK-W-18-1739 intersected 13.0 g/t Au over 2.0 metres in Lynx. Mineralization is composed of a decimetre scale quartz-carbonate vein with 1% pyrite hosted in a carbonate altered gabbro.

OSK-W-18-1741-W1 intersected 9.72 g/t Au over 2.5 metres and 5.13 g/t Au over 3.3 metres in Lynx. Mineralization includes local visible gold and 3% disseminated pyrite in fracture filling in a pervasive silica flooding zone. The host is a strong sericite and fuchsite altered gabbro. The second interval contains 2% pyrite clusters, 1% pyrite with ptygmatic tourmaline veins within a sericitized gabbro.

OSK-W-18-1742 intersected 9.64 g/t Au over 2.0 metres in Caribou. Mineralization includes 2% pyrite with quartz-tourmaline veins at low core angle, trace pyrite clusters and stringers within a weak sericite altered rhyolite.

OSK-W-18-1743-W1 intersected 6.46 g/t Au over 2.3 metres, 18.6 g/t Au over 3.0 metres and 3.35 g/t Au over 2.1 metres in Lynx. The first interval contains up to 10% pyrite with pervasive silica flooding, 2% pyrite stringers in a silica, sericite and carbonate altered contact between a bleached gabbro and a felsic porphyritic dike. The second interval contains local visible gold, up to 15% pyrite with pervasive silica flooding, 2% pyrite stringers and clusters, and 1% disseminated pyrite hosted in a bleached, sericitized and silicified gabbro in contact with a sericitized and silicified rhyolite. The third interval is composed of 3% pyrite in low core angle crustiform veins and 2% disseminated pyrite in a bleached, sericitized and silicified gabbro.

OSK-W-18-1744 intersected 8.38 g/t Au over 2.4 metres in Lynx. Mineralization is composed of local visible gold within a 10 centimetre wide quartz-tourmaline vein hosted in moderately bleached, fuchsite, sericite and carbonate altered gabbro in contact with a felsic porphyritic intrusion.

OSK-W-18-1744-W1 intersected 9.71 g/t Au over 4.5 metres in Lynx. Mineralization consists of local visible gold, up to 8% pyrite stringers with pervasive silica flooding, trace chalcopyrite, and local crustiform and ptygmatic tourmaline veins forming a stockwork texture. The host is a moderate fuchsite altered gabbro.

OSK-W-18-1745 intersected 20.4 g/t Au over 2.0 metres, 13.0 g/t Au over 2.0 metres and 7.05 g/t Au over 2.3 metres in Lynx. The frist interval contains local visible gold, up to 15% pyrite-tourmaline stringers with pervasive silica flooding hosted in a silicified rhyolite. The second interval contains 7% disseminated and interstitial pyrite in a dismembered crustiform vein and pervasive silica flooding within a weak fuchsite and silica altered gabbro. The third interval contains 2% disseminated pyrite and 3% pyrite-tourmaline stringers in quartz-carbonate veinlets within a weak silica, moderate fuchsite and chlorite altered gabbro.

OSK-W-18-1746 intersected 3.23 g/t Au over 2.1 metres in Lynx. Mineralization includes 2% disseminated pyrite and 3% pyrite-tourmaline stringers in tourmaline-quartz-carbonate veinlets hosted in a weak silica, moderate fuchsite and chlorite altered gabbro.

OSK-W-18-1747-W1 intersected 3.78 g/t Au over 2.0 metres in Zone 27. Mineralization is composed of 3% pyrite stringers with weak silica alteration hosted in a felsic porphyritic intrusion.

OSK-W-18-1750 intersected 20.0 g/t Au over 2.2 metres, 6.10 g/t Au over 2.4 metres, 6.27 g/t Au 2.4 metres and 5.67 g/t Au over 2.3 metres in Lynx. The first interval contains local visible gold, 4% pyrite stringers with pervasive silica flooding in a moderately sericitized and weakly bleached rhyolite at the contact with an andesite. The second interval contains up to 15% pyrite in intense pervasive silica flooding with trace sphalerite and up to 3% pyrite disseminated and as stringers, clusters and fragments within a sericite altered felsic fragmental dike. The third interval contains local visible gold, up to 5% pyrite disseminated and as fragments and stringers, and trace sphalerite and chalcopyrite with pervasive silica flooding, and local ptygmatic tourmaline veinlets hosted in a sericitized and bleached felsic fragmental dike. The fourth interval contains 5% pyrite with pervasive silica flooding and trace sphalerite hosted in a sericitized and bleached felsic fragmental dike.

OSK-W-18-1754 intersected 23.7 g/t Au over 2.9 metres, 5.28 g/t Au over 2.0 metres, 22.9 g/t Au over 2.0 metres, 3.19 g/t Au over 2.2 metres and 3.93 g/t Au over 2.7 metres in Lynx. The first and second intervals contain local visible gold, and 5% disseminated pyrite with pervasive silica flooding within a strongly silicified felsic fragmental dike. The third and fourth intervals contain up to 10% disseminated pyrite in pervasive silica flooding within a strong silica and fuchsite altered felsic fragmental dike. The fifth interval contains 20 % pyrite with pervasive silica flooding hosted in a sericitized and silicified felsic fragmental intrusion.

OSK-W-18-1758 intersected 5.96 g/t Au over 3.2 metres in Zone 27. Mineralization includes 5% pyrite stringers, and ptygmatic tourmaline veins within a moderate sericite altered felsic porphyritic fragmental intrusive.

OSK-W-18-1762 intersected 13.5 g/t Au over 4.7 metres in Lynx. Mineralization consists of local visible gold, 20% pyrite and 1% sphalerite with pervasive silica flooding hosted in a moderately sericitized and silicified rhyolite.

OSK-W-18-1763 intersected 7.75 g/t Au over 2.4 metres in Caribou. Mineralization includes up to 5% pyrite stringers, trace pyrite in quartz-carbonate veins and quartz-tourmaline veins within moderate silica and carbonate altered gabbro.

WST-18-004 intersected 13.0 g/t Au over 2.3 metres in Zone 27. Mineralization is composed of 1% pyrite in quartz-tourmaline veins and trace pyrite-tourmaline stringers within a moderate sericite altered felsic porphyritic dike.

WST-18-006 intersected 8.80 g/t Au over 2.0 metres in Zone 27. Mineralization is composed of 1% pyrite stringers and 2% disseminated pyrite within a chloritized felsic porphyritic dike.

Qualified Person

Quality Control and Reporting Protocols

True width determination is currently unknown but is estimated at 65-80% of the reported core length interval for the zone. Assays are uncut except where indicated. Intercepts occur within geological confines of major zones but have not been correlated to individual vein domains at this time. Reported intervals include minimum weighted averages of 3.0 g/t Au diluted over core lengths of at least 2.0 metres. All NQ core assays reported were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at (i) ALS Laboratories in Val d’Or, Québec, Thunder Bay, Ontario, Sudbury, Ontario or Vancouver, British Colombia, or (ii) Bureau Veritas in Timmins, Ontario. The 1-kilogram screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. Selected samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS Laboratories. Drill program design, Quality Assurance/Quality Control (“QA/QC”) and interpretation of results is performed by qualified persons employing a QA/QC program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for QA/QC purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assay.

About the Windfall Lake Gold Deposit

The Windfall Lake gold deposit is located between Val-d’Or and Chibougamau in the Abitibi region of Québec, Canada. The mineral resource defined by Osisko, as disclosed in the Windfall Lake Technical Report (as defined below), comprises 2,382,000 tonnes at 7.85 g/t Au (601,000 ounces) in the indicated mineral resource category and 10,605,000 tonnes at 6.70 g/t Au (2,284,000 ounces) in the inferred mineral resource category. For details regarding the key assumptions, parameters and methods used to estimate the mineral resources presented in respect of the Windfall Lake gold project, please see the technical report entitled “Technical Report and Mineral Resource Estimate for the Windfall Lake Project, Windfall Lake and Urban-Barry Properties” and dated June 12, 2018 (effective date of May 14, 2018), which has been prepared by InnovExplo Inc. from Val-d’Or, Québec (the “Windfall Lake Technical Report”). The Windfall Lake Technical Report is available on Osisko’s website at www.osiskomining.com and on SEDAR under Osisko’s issuer profile at www.sedar.com). The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. Mineralization occurs in four principal zones: Lynx, Zone 27, Caribou and Underdog. All zones comprise sub-vertical lenses following intrusive porphyry contacts plunging to the northeast. The deposit is well defined from surface to a depth of 900 metres and remains open along strike and at depth. Mineralization has been identified 30 metres from surface in some areas and as deep as 2000 metres in others, with significant potential to extend mineralization down-plunge and at depth.

About Osisko Mining Inc.

Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% in the high-grade Windfall Lake gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quevillon area (over 3,300 square kilometres), a 100% interest in the Marban project located in the heart of Québec’s prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Québec and Ontario.

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the Windfall Lake gold deposit being one of the highest grade resource-stage gold projects in Canada; the Windfall Lake gold deposit being a world-class gold system; the significance of new results from the ongoing deep-hole drill/exploration program at the Windfall Lake gold project; the significance of assay results presented in this news release; potential depth extensions of the Lynx and Underdog mineralized zones; the potential, if any of the Deep Underdog and Deep Lynx zones; the type and extend of drilling on the Deep Underdog and Deep Lynx zones, including planned wedge holes; the success of Osisko’s deep-hole drill/exploration program at the Windfall Lake gold project, if any; the down-plunge projection of the gold mineralized structures; the current 800,000 metre drill program; the type of drilling included in the drill program; potential mineralization; the potential to extend mineralization up and down-plunge and at depth at the Windfall Lake gold deposit; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities, including the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation at the time such assumptions and estimates were made, and involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions. Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information, Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:

John Burzynski
President and Chief Executive Officer

Telephone: (416) 363-8653

OSISKO MINING ANNOUNCES $25 MILLION PRIVATE PLACEMENT BY LA CAISSE DE DÉPÔT ET PLACEMENT DU QUÉBEC

Posted on October 30, 2018November 8, 2023 by Yannick Fradette

EN_Oct30

NOT FOR DISTRIBUTION TO U.S. NEWS WIRE SERVICES OR FOR DISSEMINATION IN THE UNITED STATES

Trading Symbol: TSX: OSK
FOR IMMEDIATE RELEASE

(Toronto and Montréal, October 30, 2018) – Osisko Mining Inc. (TSX:OSK) (“Osisko” or the “Corporation“) is pleased to announce that it has entered into an agreement with la Caisse de dépôt et placement du Québec (“la Caisse”) pursuant to which la Caisse will acquire, by private placement 9,259,260 common shares (“Shares”) of the Corporation at a price of $2.70 per Share.

“We are very pleased to welcome la Caisse de dépôt et placement du Québec as a significant shareholder in Osisko Mining. This investment by la Caisse provides meaningful support for the continued development of our Windfall gold project in Québec.”, said Mr. John Burzynski, President and Chief Executive Officer of Osisko.

“La Caisse is pleased to reinvest in Osisko Mining alongside a management team that has significant experience, including launching one of the largest mining projects in Québec. The company will use this investment to continue growing and enhance its Windfall project in Lebel-sur-Quévillon”, stated Mathieu Gauvin, Senior Vice-President, Québec, at Caisse de dépôt et placement du Québec.

The Offering is expected to close on or about November 2, 2018 and is subject to certain conditions including, but not limited to, the receipt of all necessary approvals including the approval of the Toronto Stock Exchange and the applicable securities regulatory authorities. The Shares to be issued under the Offering will be subject to a hold period in Canada expiring four months and one day from the closing date of the Offering.

The securities offered have not been registered under the U.S. Securities Act of 1933, as amended, and may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements. This press release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of the securities in any State in which such offer, solicitation or sale would be unlawful.

About Osisko Mining Inc.

Osisko is a mineral exploration company focused on the acquisition. exploration. and development of precious metal resource properties in Canada. Osisko holds a 100{4a519b2e1b7ee41c07b52bf609655ec62dee46aaa3d3e6dbc7220444390e11ca} in the high-grade Windfall gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 100{4a519b2e1b7ee41c07b52bf609655ec62dee46aaa3d3e6dbc7220444390e11ca} undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quevillon area (over 3,300 square kilometres), a 100{4a519b2e1b7ee41c07b52bf609655ec62dee46aaa3d3e6dbc7220444390e11ca} interest in the Marban project located in the heart of Québec’s prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property. The Corporation also holds interests and options in a number of additional properties in northern Québec and Ontario

About la Caisse de dépôt et placement du Québec

Caisse de dépôt et placement du Québec (CDPQ) is a long-term institutional investor that manages funds primarily for public and parapublic pension and insurance plans. As at June 30, 2018, it held CA$308.3 billion in net assets. As one of Canada’s leading institutional fund managers, CDPQ invests globally in major financial markets, private equity, infrastructure, real estate and private debt. For more information, visit cdpq.com, follow us on Twitter @LaCDPQ or consult our Facebook or LinkedIn pages.

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates and projections as at the date of this news release. The information in this news release about the Offering; the use of the proceeds from the Offering; the size of the Offering; the timing and ability of the Corporation to close the Offering, if at all; the timing and ability of the Corporation to satisfy the customary listing conditions of the Toronto Stock Exchange, if at all; the timing and ability of the Corporation to obtain all necessary approvals; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of Osisko, at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the Offering; volatility in the trading price of common shares of the Corporation; risks relating to the ability of the Corporation to obtain required approvals, complete definitive documentation and complete the Offering; the ability of Osisko to complete further exploration activities, including drilling; property interests; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; changes in the tax and regulatory regime; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:

John Burzynski
President and Chief Executive Officer, Osisko Mining inc.
Telephone: (416) 363-8653

Jean-Benoit Houde
Senior Advisor, Strategic Communications
Caisse de dépôt et placement du Québec
Telephone : (514) 847-5493

OSISKO INTERSECTS 1026 g/t Au OVER 2.7 METRES AT LYNX

Posted on October 23, 2018November 8, 2023 by Yannick Fradette

Windfall Infill Drilling Continues to Confirm High-Grade

(Toronto, October 23, 2018) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new infill drilling results from the ongoing drill definition and expansion program at its 100% owned Windfall Lake gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec. The 800,000 metre drill program commenced in late 2015. The program is currently focussed on infill drilling within the main Windfall gold deposit and the adjacent Lynx deposit (located immediately NE of Windfall), exploration and expansion drilling on the main mineralized zones, and deep exploration in the central areas of the intrusive system. Significant new analytical results from 37 intercepts in 17 drill holes and 6 wedges focused on infill drilling are presented below.

Highlights from the new results include: 1026 g/t Au over 2.7 metres in OSK-W-18-1725; 48.7 g/t Au over 3.3 metres in OSK-W-18-1560-W2; 59.3 g/t Au over 2.0 metres in OSK-W-18-1503-W1; 39.3 g/t Au over 2.3 metres in OSK-W-18-1665; 33.3 g/t Au over 2.7 metres in OSK-W-18-1711-W2 and 9.01 g/t Au over 9.2 metres in OSK-W-18-1402-W3. Maps showing hole locations and full analytical results are available at www.osiskomining.com.

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Type	Mineralized Zone
OSK-W-18-1402-W3	920.1	929.3	9.2	9.01		infill	Underdog
OSK-W-18-1475	258.8	261.0	2.2	8.09		infill	Lynx
including	258.8	259.1	0.3	36.1		infill	Lynx
OSK-W-18-1503-W1	406.8	409.1	2.3	5.09		infill	Lynx
including	407.5	408.3	0.8	11.3		infill	Lynx
	420.0	422.0	2.0	59.3	36.4	infill	Lynx
including	420.7	421.4	0.7	166	100	infill	Lynx
	430.5	432.5	2.0	29.7	15.5	infill	Lynx
including	431.2	431.5	0.3	195	100	infill	Lynx
OSK-W-18-1545	383.0	385.9	2.9	11.2		infill	Zone 27
OSK-W-18-1557	230.0	232.0	2.0	3.72		infill	Lynx
including	230.0	230.6	0.6	10.3		infill	Lynx
OSK-W-18-1560-W1	464.7	467.0	2.3	5.35		infill	Lynx
	534.7	537.0	2.3	9.89		infill	Lynx
including	535.4	535.9	0.5	36.7		infill	Lynx
	538.7	542.6	3.9	6.88		infill	Lynx
including	538.7	539.0	0.3	24.1
and	541.6	542.6	1.0	18.9
OSK-W-18-1560-W2	473.5	475.8	2.3	5.28		infill	Lynx
including	474.8	475.3	0.5	14.9		infill	Lynx
	542.3	545.6	3.3	48.7	34.5	infill	Lynx
OSK-W-18-1587	198.1	200.1	2.0	10.0		infill	Lynx
OSK-W-18-1665	363.7	366.0	2.3	39.3		infill	Zone 27
including	365.0	366.0	1.0	72.2		infill	Zone 27
OSK-W-18-1678	387.0	389.1	2.1	5.88		infill	Zone 27
including	388.8	389.1	0.3	40.0		infill	Zone 27
OSK-W-18-1691	39.3	41.5	2.2	4.25		infill	Caribou
including	39.7	40.5	0.8	11.4		infill	Caribou
OSK-W-18-1707	153.1	155.4	2.3	3.95		infill	Caribou
	199.0	201.0	2.0	6.23		infill	Caribou
	380.0	382.4	2.4	27.4		infill	Zone 27
including	380.0	381.0	1.0	50.4		infill	Zone 27
	387.0	391.0	4.0	6.81		infill	Zone 27
OSK-W-18-1710	112.3	114.6	2.3	14.2		infill	Bobcat
OSK-W-18-1711	605.4	608.0	2.6	5.08		infill	Lynx
OSK-W-18-1711-W1	547.0	549.0	2.0	4.55		infill	Lynx
	560.6	563.4	2.8	12.5	11.5	infill	Lynx
including	560.6	560.9	0.3	109	100	infill	Lynx
	568.4	570.4	2.0	6.36		infill	Lynx
OSK-W-18-1711-W2	631.3	634.0	2.7	33.3	26.6	infill	Lynx
including	632.2	632.9	0.7	126	100	infill	Lynx
OSK-W-18-1712	210.0	212.2	2.2	5.14		infill	Lynx
including	210.4	211.2	0.8	13.0		infill	Lynx
OSK-W-18-1713	533.8	535.9	2.1	6.48		infill	Zone 27
OSK-W-18-1714	290.0	292.4	2.4	3.59		infill	Lynx
OSK-W-18-1723	488.4	490.6	2.2	22.7		infill	Lynx
	498.6	501.2	2.6	4.06		infill	Lynx
including	500.8	501.2	0.4	25.3		infill	Lynx
OSK-W-18-1725	283.3	286.0	2.7	1026	64.8	infill	Lynx
including	283.3	284.0	0.7	502	100
and	284.4	285.3	0.9	2670	100
	293.0	297.0	4.0	13.9		infill	Lynx
including	293.6	294.4	0.8	42.2		infill	Lynx
OSK-W-18-1727	169.0	171.0	2.0	6.51		infill	Lynx
including	169.0	169.8	0.8	15.6		infill	Lynx
OSK-W-18-1729	263.0	268.0	5.0	3.16		infill	Zone 27
	272.5	274.8	2.3	7.00		infill	Zone 27
including	272.5	273.3	0.8	13.7		infill	Zone 27
	282.8	285.9	3.1	3.62		infill	Zone 27
including	282.8	283.2	0.4	20.0		infill	Zone 27

Note: True widths are estimated at 65 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below.

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Section
OSK-W-18-1402-W3	330	-59	1182	452617	5434447	2600
OSK-W-18-1475	327	-56	357	453262	5434892	3375
OSK-W-18-1503-W1	145	-45	468	453429	5435419	3775
OSK-W-18-1545	332	-49	522	452452	5434665	2575
OSK-W-18-1557	335	-52	374	453422	5434925	3550
OSK-W-18-1560-W1	159	-53	576	453373	5435483	3775
OSK-W-18-1560-W2	163	-56	600	453373	5435483	3775
OSK-W-18-1587	332	-62	360	453451	5435009	3600
OSK-W-18-1665	347	-46	375	452104	5434436	2150
OSK-W-18-1678	327	-63	420	452289	5434575	2375
OSK-W-18-1691	338	-59	78	452251	5434568	2350
OSK-W-18-1707	329	-49	447	452450	5434658	2550
OSK-W-18-1710	141	-45	330	452878	5435058	3125
OSK-W-18-1711	134	-52	642	453367	5435556	3800
OSK-W-18-1711-W1	134	-52	637.5	453367	5435556	3800
OSK-W-18-1711-W2	134	-52	657	453367	5435556	3800
OSK-W-18-1712	329	-55	252	453194	5434916	3325
OSK-W-18-1713	333	-45	552	452399	5434439	2400
OSK-W-18-1714	331	-63	321	453185	5434903	3325
OSK-W-18-1723	142	-49	531	453329	5435466	3725
OSK-W-18-1725	340	-54	399	453418	5434901	3525
OSK-W-18-1727	331	-61	378	453459	5435040	3625
OSK-W-18-1729	360	-53	318	452019	5434494	2100

OSK-W-18-1402-W3 intersected 9.01 g/t Au over 9.2 metres in Underdog. Mineralization includes up to 15% pyrite stringers, 3% chalcopyrite, 2% quartz-tourmaline ptygmatic veins and local visible gold within a strong silica and sericite altered felsic porphyritic dike.

OSK-W-18-1475 intersected 8.09 g/t Au over 2.2 metres in Lynx. Mineralization includes 4% disseminated pyrite and stringers in a moderate chlorite, weak silica and sericite altered rhyolite.

OSK-W-18-1503-W1 intersected three intervals in Lynx: 5.09 g/t Au over 2.3 metres, 59.3 g/t Au over 2.0 metres and 29.7 g/t Au over 2.0 metres. The first interval contains 5% disseminated/cluster pyrite, and up 3% pyrite/pyrite-tourmaline stringers within a weak fuchsite and sericite altered gabbro. The second interval contains local visible gold in pyrite stringers and trace chalcopyrite within a moderate sericite altered rhyolite. The third interval has local visible gold and electrum within centimetre scale smoky quartz veins, hosted in a moderate sericite altered rhyolite.

OSK-W-18-1545 intersected 11.2 g/t Au over 2.9 metres in Zone 27. Mineralization consists of up to 40% pyrite as stringers, patches and semi-massive, ptygmatic tourmaline veinlets and quartz-carbonate veins hosted at the contact between a fuchsite, sericite, chlorite altered gabbro and moderate sericite altered fragmental felsic intrusion.

OSK-W-18-1557 intersected 3.72 g/t Au over 2.0 metres in Lynx. Mineralization consists of up to 40% pyrite as stringers and patches with ptygmatic tourmaline veinlets and breccia quartz-carbonate veins hosted at the contact between a fuchsite, sericite and chlorite altered gabbro and a moderate sericite altered fragmental felsic intrusion.

OSK-W-18-1560-W1 intersected three intervals in Lynx: 5.35 g/t Au over 2.3 metres, 9.89 g/t Au over 2.3 metres and 6.88 g/t Au over 3.9 metres. The first interval contains up to 7% pyrite stringers, 5% pyrite in smoky quartz veins, 2% pyrite in dismembered tourmaline ptygmatic veins, 10% disseminated and clustered pyrite in a sericitized and silicified rhyolite. The second interval contains 7% disseminated pyrite and 5% pyrite within quartz-carbonate veins hosted in a sericite, silica and fuchsite altered gabbro. The third interval contains up to 7% disseminated pyrite, 5% pyrite in quartz-carbonate veins hosted in a bleached, sericitized and silicified gabbro.

OSK-W-18-1560-W2 intersected two intervals in Lynx 5.28 g/t Au over 2.3 metres and 48.7 g/t Au over 3.3 metres. The first interval contains up to 10% pyrite stringers, 10% pyrite with pervasive silica flooding, 10% disseminated pyrite and 3% disseminated chalcopyrite. The mineralization is hosted in an alternation between bleached, sericitized and silicified gabbro and sericitized rhyolite. The second interval contains up to 20% disseminated pyrite, 20% pyrite stringers, 5% pyrite within quartz-tourmaline veins and 1% hosted in a silica, fuchsite and sericite altered gabbro.

OSK-W-18-1587 intersected 10.0 g/t Au over 2.0 metres in Lynx. Mineralization consists of 4% disseminated pyrite and ptygmatic quartz-tourmaline veins within a strong sericite and silica altered contact between a gabbro and a rhyolite.

OSK-W-18-1665 intersected 39.3 g/t Au over 2.3 metres in Zone 27. Mineralization consists of up to 15% pyrite-tourmaline and trace of ptygmatic tourmaline veinlets hosted in a moderate sericite altered porphyritic felsic intrusion.

OSK-W-18-1678 intersected 5.88 g/t Au over 2.1 metres in Zone 27. Mineralization includes local visible gold, 5% pyrite and 1% chalcopyrite in fragmented and dismembered quartz-carbonate veinlets, 3% disseminated pyrite and quartz-tourmaline stringers hosted in bleached and sericitized gabbro.

OSK-W-18-1691 intersected 4.25 g/t Au over 2.2 metres in Caribou. Mineralization includes traces disseminated pyrite in a strongly chloritized, moderately bleached and sericitized andesite.

OSK-W-18-1707 intersected four intervals: 3.95 g/t Au over 2.3 metres and 6.23 g/t Au over 2.0 metres in Caribou; 27.4 g/t Au over 2.4 metres and 6.81 g/t Au over 4.0 metres in Zone 27. The first interval includes 10% pyrite and 2% sphalerite within pervasive silica flooding, hosted in a silica and sericite altered rhyolite. The second interval contains up to 10 % pyrite stringers, locally semi-massive, wthin silicified and sericitized rhyolite. The third and fourth intervals include up to 15% pyrite stringers, 1% pyrite within smoky quartz veins, hosted in a bleached, strong silica and sericite altered felsic porphyritic intrusion.

OSK-W-18-1710 intersected 14.2 g/t Au over 2.3 metres in Bobcat. Mineralization consists of up to 40% crustiform veins with 2% pyrite, trace sphalerite and chalcopyrite hosted in a weak sericite and silica altered rhyolite.

OSK-W-18-1711 intersected 5.08 g/t Au over 2.6 metres in Lynx. Mineralization consists of 2% pyrite in quartz-tourmaline veins within a sericite and silica altered rhyolite; OSK-W-18-1711-W1 intersected 4.55 g/t Au over 2.0 metres, 12.5 g/t Au over 2.8 metres and 6.36 g/t Au over 2.0 metres. The first interval includes 1% pyrite stringers and clusters in a sericite, silica and carbonate altered rhyolite. The second interval contains 7% pyrite-tourmaline stringers, 5% pyrite clusters within a silica, sericite and fuchsite altered rhyolite. The third interval contains 1% pyrite stringers and clusters in a strong chlorite, weak sericite and carbonate altered rhyolite; OSK-W-18-1711-W2 intersected 33.3 g/t Au over 2.7 metres in Lynx. Mineralization consists of local visible gold, 5% disseminated pyrite and quartz-tourmaline veins hosted in a moderate silica and sericite altered gabbro.

OSK-W-18-1712 intersected 5.14 g/t Au over 2.2 metres in Lynx. Mineralization consists of 2% pyrite stringers, 2% pyrite clusters and ptygmatic tourmaline veins hosted at the contact between a strong silica altered rhyolite and a weak fuchsite altered gabbro.

OSK-W-18-1713 intersected 6.48 g/t Au over 2.1 metres in Zone 27. Mineralization consists of 40% semi-massive pyrite and trace chalcopyrite with quartz clusters and hosted in a silica altered porphyritic felsic dike.

OSK-W-18-1714 intersected 3.59 g/t Au over 2.4 metres. Mineralization consists of 4% pyrite stringers and clusters with 2% crustiform veins and 1% quartz-tourmaline veinlets hosted in a moderate silica and fuchsite altered gabbro.

OSK-W-18-1723 intersected two intervals in Lynx: 22.7 g/t Au over 2.2 metres and 4.06 g/t Au over 2.6 metres. The first interval includes up to 15% pyrite and trace sphalerite within pervasive silica flooding, trace disseminated pyrite clusters and stringers and ptygmatic tourmaline veinlets hosted a moderate sericite rhyolite. The second interval contains 5% pyrite stringers, 1% pyrite and traces of chalcopyrite in a laminated quartz-tourmaline veinlet hosted in a moderate sericite and weak fuchsite altered gabbro.

OSK-W-18-1725 intersected two intervals in Lynx: 1026 g/t Au over 2.7 metres and 13.9 g/t Au over 4.0 metres. The first interval contains local visible gold, up to 15% disseminated pyrite and stringers with pervasive silica flooding hosted in strong silica, weak fuchsite altered porphyritic felsic dike. The second interval contains local visible gold, up to 7% pyrite stringers within a weak fuchsite altered fragmental felsic dike.

OSK-W-18-1727 intersected 6.51 g/t Au over 2.0 metre in Lynx. Mineralization includes 1% pyrite stringers within a strong chlorite, moderate carbonate, weak sericite and fuchsite altered gabbro.

OSK-W-18-1729 intersected three intervals in Zone 27: 3.16 g/t Au over 5.0 metre, 7.00 g/t Au over 2.3 metres and 3.62 g/t Au over 3.1 metres. The first interval contains 10% pyrite stringers with local tourmaline ptygmatic veins hosted at the contact between a moderate sericite and weak silicified altered felsic porphyritic dike and a moderate sericite altered andesite. The second interval contains 7% pyrite stringers and up to 20% pyrite in pervasive silica flooding within a silicified and sericitized porphyritic felsic intrusion. The third interval contains up to 5% pyrite stringers, 3% pyrite with ptygmatic tourmaline veins and 3% disseminated pyrite within a moderate sericite and weak silica altered felsic porphyritic intrusion.

Qualified Person

Quality Control and Reporting Protocols

About the Windfall Lake Gold Deposit

The Windfall Lake gold deposit is located between Val-d’Or and Chibougamau in the Abitibi region of Québec, Canada. The mineral resource defined by Osisko, as disclosed in the Windfall Lake Technical Report (as defined below), comprises 2,382,000 tonnes at 7.85 g/t Au (601,000 ounces) in the indicated mineral resource category and 10,605,000 tonnes at 6.70 g/t Au (2,284,000 ounces) in the inferred mineral resource category. For details regarding the key assumptions, parameters and methods used to estimate the mineral resources presented in respect of the Windfall Lake gold project, please see the technical report entitled “Technical Report and Mineral Resource Estimate for the Windfall Lake Project, Windfall Lake and Urban-Barry Properties” and dated June 12, 2018 (effective date of May 14, 2018), which has been prepared by InnovExplo Inc. from Val-d’Or, Québec (the “Windfall Lake Technical Report”). The Windfall Lake Technical Report is available on Osisko’s website at www.osiskomining.com and on SEDAR under Osisko’s issuer profile at www.sedar.com). The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. Mineralization occurs in four principal zones: Lynx, Zone 27, Caribou and Underdog. All zones comprise sub-vertical lenses following intrusive porphyry contacts plunging to the northeast. The deposit is well defined from surface to a depth of 900 metres and remains open along strike and at depth. Mineralization has been identified 30 metres from surface in some areas and as deep as 2000 metres in others, with significant potential to extend mineralization down-plunge and at depth.

About Osisko Mining Inc.

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the Windfall Lake gold deposit being one of the highest grade resource-stage gold projects in Canada; the Windfall Lake gold deposit being a world-class gold system; the significance of new results from the ongoing deep-hole drill/exploration program at the Windfall Lake gold project; the significance of assay results presented in this news release; potential depth extensions of the Lynx and Underdog mineralized zones; the potential, if any of the Deep Underdog and Deep Lynx zones; the type and extend of drilling on the Deep Underdog and Deep Lynx zones, including planned wedge holes; the success of Osisko’s deep-hole drill/exploration program at the Windfall Lake gold project, if any; the down-plunge projection of the gold mineralized structures; the current 800,000 metre drill program; the type of drilling included in the drill program; potential mineralization; the potential to extend mineralization up and down-plunge and at depth at the Windfall Lake gold deposit; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities, including the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation at the time such assumptions and estimates were made, and involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions. Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information, Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:

John Burzynski
President and Chief Executive Officer

Telephone: (416) 363-8653

BEAUFIELD OBTAINS FINAL COURT ORDER FOR ARRANGEMENT

Posted on October 15, 2018November 8, 2023 by Yannick Fradette

Beaufield

NOT FOR DISTRIBUTION TO UNITED STATES NEWSWIRE SERVICES OR FOR DISSEMINATION IN THE UNITED STATES

Toronto, Ontario and Montréal, Québec (October 15, 2018) – Osisko Mining Inc. (TSX: OSK) (“Osisko“) and Beaufield Resources Inc. (TSX-V: BFD) (“Beaufield“) are pleased to announce that, earlier today, Beaufield obtained the final order of the Superior Court of Québec for the proposed Arrangement (as defined herein) with Osisko.

Assuming that all conditions precedent are satisfied or waived, Osisko and Beaufield currently anticipate the closing of the Arrangement to occur on October 19, 2018.

The Arrangement

On August 14, 2018, Osisko and Beaufield entered into a definitive arrangement agreement, whereby, subject to the terms and conditions of the arrangement agreement, Osisko will acquire all of the issued and outstanding common shares of Beaufield, which it does not already own, pursuant to a statutory plan of arrangement under the provisions of the Canada Business Corporations Act (the “Arrangement“). In addition, pursuant to the Arrangement, all of the outstanding options to acquire shares of Beaufield and all of the outstanding warrants exercisable into shares of Beaufield, to the extent they have not been exercised prior to the effective time of the Arrangement, will be exchanged for such number of options or warrants, as the case may be, to acquire shares of Osisko.

Under the terms of the Arrangement, shareholders of Beaufield (other than Osisko and any shareholders of Beaufield validly exercising dissent rights, if any) will be entitled to receive 0.0482 of a share of Osisko in exchange for each share of Beaufield held immediately prior to the effective time of the Arrangement.

Further details regarding the Arrangement are set out in the management information circular of Beaufield dated September 11, 2018, which is available on SEDAR (www.sedar.com) under Beaufield’s issuer profile.

About Osisko Mining Inc.

Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100{4a519b2e1b7ee41c07b52bf609655ec62dee46aaa3d3e6dbc7220444390e11ca} in the high-grade Windfall Lake gold deposit located between Val-d’Or and Chibougamau in Québec and holds a 100{4a519b2e1b7ee41c07b52bf609655ec62dee46aaa3d3e6dbc7220444390e11ca} undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quevillon area (over 3,300 square kilometres), a 100{4a519b2e1b7ee41c07b52bf609655ec62dee46aaa3d3e6dbc7220444390e11ca} interest in the Marban project located in the heart of Québec’s prolific Abitibi gold mining district, and properties in the Larder Lake Mining Division in northeast Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past producing mine and the Gold Pike mine property. The Corporation also holds interests and options in a number of additional properties in northern Québec and Ontario.

For further information about Osisko please contact:

John Burzynski
President and Chief Executive Officer
Telephone: (416) 363-8653

About Beaufield Resources Inc.

Beaufield is a mineral exploration company with its exploration activity focused in Québec and Ontario. Please refer to Beaufield’s website at www.beaufield.com to view the Beaufield’s properties in Urban, Eléonore-Opinaca, Tortigny, Hemlo and Launay.

For further information about Beaufield please contact:

Vatché Tchakmakian
Secretary and Chief Financial Officer
Telephone: (514) 842-3443

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this news release. No stock exchange, securities commission or other regulatory authority has approved or disapproved of the information contained herein.

OSISKO WINDFALL EXPLORATION RAMP ACHIEVES UNDERGROUND ACCESS TO ZONE 27

Posted on October 11, 2018November 8, 2023 by Yannick Fradette

(Toronto – October 11, 2018) Osisko Mining Inc. (the “Company” or “Osisko”) (TSX:OSK) is pleased to announce that last night the Windfall exploration ramp achieved access to Zone 27, wireframe 115, selected for the initial 5,000 tonne bulk sample (see photo 1 below). The mineralized zone is strongly silicified with sulfides and contains local visible gold (see photo 2 below). The geology observed compares very well with the anticipated zone predicted by drilling and the geological model. The exploration ramp also encountered a mineralized section containing local visible gold in wireframe 101 immediately prior to achieving the targeted 115 wireframe bulk sample area (see photo 3 below). Work in the exploration ramp over the coming weeks will now be focused on collecting the bulk sample which will be transported to a custom milling facility in Ontario for processing in November.

Photo 1. Windfall underground geology team members (Fanny Tortiget, P.Geo (right) and Pier-Olivier Gauthier,Eng.) standing in Zone 27.

Photo 2. First exposure of Zone 27 wireframe 115 in the Windfall exploration ramp.

Photo 3. Sample of mineralized material containing local visible gold from Zone 27 wireframe 101.

Qualified Person

About the Windfall Lake Gold Deposit

The Windfall Lake gold deposit is located between Val-d’Or and Chibougamau in the Abitibi region of Québec, Canada. The mineral resource defined by Osisko, as disclosed in the Windfall Lake Technical Report (as defined below), comprises 2,382,000 tonnes at 7.85 g/t Au (601,000 ounces) in the indicated mineral resource category and 10,605,000 tonnes at 6.70 g/t Au (2,284,000 ounces) in the inferred mineral resource category. For details regarding the key assumptions, parameters and methods used to estimate the mineral resources presented in respect of the Windfall Lake gold project, please see the technical report entitled “Technical Report and Mineral Resource Estimate for the Windfall Lake Project, Windfall Lake and Urban-Barry Properties” and dated June 12, 2018 (effective date of May 14, 2018), which has been prepared by InnovExplo Inc. from Val-d’Or, Québec (the “Windfall Lake Technical Report”). The Windfall Lake Technical Report is available on Osisko’s website at www.osiskomining.com and on SEDAR under Osisko’s issuer profile at www.sedar.com). The Windfall Lake gold deposit is currently one of the highest grade resource-stage gold projects in Canada. Mineralization occurs in four principal zones: Lynx, Zone 27, Caribou and Underdog. All zones comprise sub-vertical lenses following intrusive porphyry contacts plunging to the northeast. The deposit is well defined from surface to a depth of 900 metres and remains open along strike and at depth. Mineralization has been identified 30 metres from surface in some areas and as deep as 2000 metres in others, with significant potential to extend mineralization down-plunge and at depth.

About Osisko Mining Inc.

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. The information in this news release about the Windfall Lake gold deposit being one of the highest grade resource-stage gold projects in Canada; the Windfall Lake gold deposit being a world-class gold system; the significance of new results from the ongoing deep-hole drill/exploration program at the Windfall Lake gold project; the significance of assay results presented in this news release; potential depth extensions of the Lynx and Underdog mineralized zones; the potential, if any of the Deep Underdog and Deep Lynx zones; the type and extend of drilling on the Deep Underdog and Deep Lynx zones, including planned wedge holes; the success of Osisko’s deep-hole drill/exploration program at the Windfall Lake gold project, if any; the down-plunge projection of the gold mineralized structures; the current 800,000 metre drill program; the type of drilling included in the drill program; potential mineralization; the potential to extend mineralization up and down-plunge and at depth at the Windfall Lake gold deposit; the ability to realize upon any mineralization in a manner that is economic; the ability to complete any proposed exploration activities and the results of such activities, including the continuity or extension of any mineralization; and any other information herein that is not a historical fact may be “forward-looking information”. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as “expects”, or “does not expect”, “is expected”, “interpreted”, “management’s view”, “anticipates” or “does not anticipate”, “plans”, “budget”, “scheduled”, “forecasts”, “estimates”, “believes” or “intends” or variations of such words and phrases or stating that certain actions, events or results “may” or “could”, “would”, “might” or “will” be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This forward-looking information is based on reasonable assumptions and estimates of management of the Corporation at the time such assumptions and estimates were made, and involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Osisko to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management’s geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property interests in the Windfall Lake gold project; the ability of the Corporation to obtain required approvals and complete transactions on terms announced; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions. Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information, Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

For further information please contact:

John Burzynski
President and Chief Executive Officer

Telephone: (416) 363-8653

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Author: Yannick Fradette