OSISKO EXPANSION DRILLING ADDS NEW HIGH GRADE AT LYNX

Posted on March 17, 2021November 8, 2023 by lboivin

177 g/t Au Over 3.0 Metres

(Toronto, March 17, 2021) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Drilling is currently focused on the Lynx deposit. Significant new analytical results presented below include 66 intercepts in 22 drill holes (5 from surface, 17 from underground) and 21 wedges. The intercepts are located outside the February 2021 mineral resource estimate (“MRE”) (see Osisko news release dated February 17, 2021) and either expand resource wireframes or are located in a defined zone or corridor but do not yet correlate to a specific wireframe.

Osisko Chief Executive Officer John Burzynski commented: “Today’s expansion results in Lynx and Triple Lynx continue to confirm the growth potential of these zones. The higher-grade intercept in OSK-W-20-2381-W1 extends Lynx 90 metres from the nearest MRE block and WST-20-0602 extends Triple Lynx 100 metres from the nearest MRE block”.

Selected high-grade intercepts include: 177 g/t Au over 3.0 metres and 66.6 g/t Au over 2.0 metres in OSK-W-20-2381-W1; 43.4 g/t Au over 5.3 metres in WST-20-0602; 56.4 g/t Au over 3.2 metres in WST-20-0603; 52.1 g/t Au over 3.4 metres in WST-20-0611; 70.2 g/t Au over 2.2 metres in OSK-W-20-2313-W7; 57.2 g/t Au over 2.1 metres in OSK-W-20-2391; and 25.1 g/t Au over 4.8 metres in OSK-W-20-2252-W8. Maps showing hole locations and full analytical results are available at www.osiskomining.com

Expansion Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-20-2170-W7	1029.6	1031.9	2.3	11.1		Triple Lynx	Triple Lynx
including	1029.6	1030.0	0.4	59.7		Triple Lynx	Triple Lynx
OSK-W-20-2252-W10	1182.6	1184.8	2.2	3.89		Triple Lynx	Triple Lynx
	1190.2	1192.4	2.2	13.8		Triple Lynx	Triple Lynx
including	1191.2	1192.1	0.9	31.3		Triple Lynx	Triple Lynx
	1204.3	1206.3	2.0	4.22		Triple Lynx	Triple Lynx
OSK-W-20-2252-W8	975.2	980.0	4.8	25.1	22.6	Triple Lynx	Triple Lynx
including	976.5	977.7	1.2	85.8	75.6	Triple Lynx	Triple Lynx
OSK-W-20-2271-W2	1133.5	1135.5	2.0	3.64		Lynx 4	Lynx
including	1134.0	1134.5	0.5	14.5		Lynx 4	Lynx
OSK-W-20-2271-W5	1064.6	1067.4	2.8	4.74		Lynx 4	Lynx
including	1064.6	1065.0	0.4	13.1		Lynx 4	Lynx
OSK-W-20-2280-W7	977.0	981.8	4.8	7.78		Triple Lynx	Triple Lynx
including	977.0	977.4	0.4	30.4		Triple Lynx	Triple Lynx
OSK-W-20-2283-W2	951.0	953.0	2.0	3.94		Triple Lynx	Triple Lynx
OSK-W-20-2287	1245.0	1247.0	2.0	3.51		Lynx 4	Lynx
OSK-W-20-2292-W1	1131.8	1134.0	2.2	3.66		Triple Lynx	Triple Lynx
including	1131.8	1132.1	0.3	23.5		Triple Lynx	Triple Lynx
OSK-W-20-2313-W7	993.0	995.2	2.2	70.2	14.4	Triple Lynx	Triple Lynx
including	994.9	995.2	0.3	509	100	Triple Lynx	Triple Lynx
OSK-W-20-2313-W9	793.0	797.5	4.5	5.65		Triple Lynx	Triple Lynx
including	796.5	797.5	1.0	13.4		Triple Lynx	Triple Lynx
OSK-W-20-2322-W1	1047.4	1049.7	2.3	3.69		Lynx 4	Lynx
including	1047.4	1048.0	0.6	13.7		Lynx 4	Lynx
OSK-W-20-2328	898.2	900.5	2.3	3.64		Lynx 4	Lynx
OSK-W-20-2363	578.0	582.0	4.0	6.19		Triple Lynx	Triple Lynx
including	581.3	582.0	0.7	24.4		Triple Lynx	Triple Lynx
OSK-W-20-2363-W1	662.0	664.1	2.1	4.43		Triple Lynx	Triple Lynx
OSK-W-20-2363-W2	751.0	753.5	2.5	5.90		Triple Lynx	Triple Lynx
including	753.0	753.5	0.5	12.0		Triple Lynx	Triple Lynx
	867.6	870.0	2.4	5.18		Triple Lynx	Triple Lynx
including	867.6	868.0	0.4	27.7		Triple Lynx	Triple Lynx
	887.0	889.0	2.0	3.75		Triple Lynx	Triple Lynx
OSK-W-20-2363-W3	999.1	1001.6	2.5	4.52		Triple Lynx	Triple Lynx
OSK-W-20-2371-W1	654.0	656.3	2.3	17.9		Triple Lynx	Triple Lynx
including	655.2	655.8	0.6	60.8		Triple Lynx	Triple Lynx
	717.0	719.0	2.0	5.97		Triple Lynx	Triple Lynx
	937.0	939.0	2.0	3.68		Triple Lynx	Triple Lynx
including	938.1	938.4	0.3	20.4		Triple Lynx	Triple Lynx
	977.5	980.9	3.4	10.8		Triple Lynx	Triple Lynx
including	977.5	977.8	0.3	70.1		Triple Lynx	Triple Lynx
OSK-W-20-2371-W2	815.0	817.0	2.0	3.60		Triple Lynx	Triple Lynx
	1047.0	1049.0	2.0	4.04		Lynx 4	Lynx
including	1047.4	1048.1	0.7	11.4		Lynx 4	Lynx
OSK-W-20-2375-W3	918.0	920.0	2.0	3.86		Lynx 4	Lynx
OSK-W-20-2381-W1	1332.0	1335.0	3.0	177	38.2	Lynx 4	Lynx
including	1332.0	1333.0	1.0	515	100	Lynx 4	Lynx
	1364.5	1366.5	2.0	66.6	26.6	Lynx 4	Lynx
including	1366.1	1366.5	0.4	300	100	Lynx 4	Lynx
OSK-W-20-2391	1183.3	1185.4	2.1	57.2	26.2	Triple Lynx	Triple Lynx
including	1185.1	1185.4	0.3	317	100	Triple Lynx	Triple Lynx
	1283.0	1285.1	2.1	9.73		Triple Lynx	Triple Lynx
including	1283.7	1284.0	0.3	58.1		Triple Lynx	Triple Lynx
OSK-W-20-2391-W2	1380.0	1382.0	2.0	10.7		Triple Lynx	Triple Lynx
including	1380.9	1381.2	0.3	65.3		Triple Lynx	Triple Lynx
	1390.3	1394.7	4.4	21.2		Triple Lynx	Triple Lynx
including	1392.8	1393.1	0.3	65.3
and	1393.9	1394.7	0.8	58.0
OSK-W-20-2394-W1	889.0	891.0	2.0	5.04		Triple Lynx	Triple Lynx
OSK-W-20-2394-W3	1012.6	1015.0	2.4	33.5		Triple Lynx	Triple Lynx
including	1013.2	1014.0	0.8	99.9		Triple Lynx	Triple Lynx
OSK-W-21-2445	445.0	447.0	2.0	10.3		Triple Lynx	Triple Lynx
including	446.7	447.0	0.3	61.6		Triple Lynx	Triple Lynx
WST-20-0522	243.0	245.1	2.1	3.79		Lynx SW	Lynx SW
WST-20-0523A	297.0	299.0	2.0	3.83		Lynx SW	Lynx SW
WST-20-0524	238.7	241.0	2.3	3.60		Lynx SW	Lynx SW
including	239.6	240.0	0.4	16.9		Lynx SW	Lynx SW
WST-20-0548A	271.4	273.6	2.2	3.60		Triple Lynx	Triple Lynx
including	272.1	272.8	0.7	10.9		Triple Lynx	Triple Lynx
WST-20-0554	357.4	359.4	2.0	6.43		Triple Lynx	Triple Lynx
	424.0	426.2	2.2	3.77		Triple Lynx	Triple Lynx
WST-20-0569	412.0	414.0	2.0	4.31		Lynx SW	Lynx
including	412.4	412.7	0.3	27.6		Lynx SW	Lynx
WST-20-0570	323.0	325.0	2.0	3.85		Lynx SW	Lynx SW
WST-20-0574	302.9	305.7	2.8	9.11		Lynx SW	Lynx SW
	308.0	310.0	2.0	4.07		Lynx SW	Lynx SW
	394.5	396.9	2.4	5.64		Lynx SW	Lynx SW
	416.0	418.7	2.7	9.20		Lynx SW	Lynx SW
including	418.4	418.7	0.3	78.9		Lynx SW	Lynx SW
	510.8	513.0	2.2	4.58		Lynx SW	Lynx SW
including	511.7	512.2	0.5	20.0		Lynx SW	Lynx SW
WST-20-0575	159.0	161.0	2.0	3.54		Triple Lynx	Triple Lynx
WST-20-0602	397.1	400.4	3.3	9.53		Lynx SW	Lynx SW
including	397.6	398.0	0.4	28.7		Lynx SW	Lynx SW
	572.0	577.3	5.3	43.4	29.9	Lynx SW	Lynx SW
including	572.0	573.0	1.0	172	100	Lynx SW	Lynx SW
WST-20-0603	250.5	253.7	3.2	56.4	34.3	Lynx SW	Lynx SW
including	252.0	252.7	0.7	201	100	Lynx SW	Lynx SW
	257.8	260.0	2.2	5.07		Lynx SW	Lynx SW
	278.0	280.0	2.0	28.0		Triple Lynx	Triple Lynx
including	278.7	279.2	0.5	95.2		Triple Lynx	Triple Lynx
WST-20-0606A	248.5	250.5	2.0	5.41		Lynx SW	Lynx SW
	273.2	275.2	2.0	15.3		Lynx SW	Lynx SW
including	273.7	274.0	0.3	37.3		Lynx SW	Lynx SW
	329.0	331.0	2.0	4.41		Lynx SW	Lynx SW
WST-20-0609	299.0	301.4	2.4	12.9		Lynx SW	Lynx SW
including	300.9	301.4	0.5	57.0		Lynx SW	Lynx SW
	326.7	329.0	2.3	4.77		Triple Lynx	Triple Lynx
including	326.7	327.4	0.7	11.1		Triple Lynx	Triple Lynx
	346.7	349.0	2.3	3.90		Lynx SW	Lynx SW
including	346.7	347.2	0.5	17.4		Lynx SW	Lynx SW
WST-20-0611	289.0	292.4	3.4	52.1	27.0	Triple Lynx	Triple Lynx
including	291.8	292.4	0.6	242	100	Triple Lynx	Triple Lynx
WST-20-0615	258.1	260.5	2.4	12.0		Lynx SW	Lynx SW
WST-20-0626	451.7	453.8	2.1	4.51		Lynx SW	Lynx SW
WST-20-0631	14.8	17.0	2.2	7.22		Lynx	Lynx
including	14.8	15.6	0.8	19.7		Lynx	Lynx

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below. SW = Southwest.

Drill hole location

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-20-2170-W7	128	-59	1205	453425	5435657	413	3900
OSK-W-20-2252-W10	129	-54	1226	453241	5435694	415	3750
OSK-W-20-2252-W8	129	-54	1239	453241	5435694	415	3750
OSK-W-20-2271-W2	120	-53	1223	453462	5435682	410	3950
OSK-W-20-2271-W5	120	-53	1247	453462	5435682	410	3950
OSK-W-20-2280-W7	127	-58	1131	453304	5435639	415	3775
OSK-W-20-2283-W2	135	-50	1011	452997	5435607	425	3500
OSK-W-20-2287	116	-53	1406	453607	5435714	404	4075
OSK-W-20-2292-W1	125	-54	1149	453035	5435561	420	3525
OSK-W-20-2313-W7	134	-52	1086	452965	5435583	420	3450
OSK-W-20-2313-W9	134	-52	1218	452965	5435583	420	3450
OSK-W-20-2322-W1	130	-54	1233	453608	5435715	403	4075
OSK-W-20-2328	136	-56	942	452872	5435153	409	3175
OSK-W-20-2363	139	-52	1031	452930	5435548	419	3425
OSK-W-20-2363-W1	139	-52	1059	452930	5435548	419	3425
OSK-W-20-2363-W2	139	-52	1035	452930	5435548	419	3425
OSK-W-20-2363-W3	139	-52	1185	452930	5435548	419	3425
OSK-W-20-2371-W1	123	-53	1032	452996	5435364	412	3375
OSK-W-20-2371-W2	123	-53	1251	452996	5435364	412	3375
OSK-W-20-2375-W3	122	-56	1020	453810	5435779	400	4300
OSK-W-20-2381-W1	134	-53	1512	453620	5435791	402	4125
OSK-W-20-2391	117	-57	1629	453281	5435894	408	3900
OSK-W-20-2391-W2	117	-57	1888	453281	5435894	408	3900
OSK-W-20-2394-W1	138	-52	1065	452922	5435468	415	3375
OSK-W-20-2394-W3	138	-52	1020	452922	5435468	415	3375
OSK-W-21-2445	141	-50	945	452906	5435434	415	3325
WST-20-0522	177	-52	457	453104	5435064	231	3325
WST-20-0523A	165	-46	387	453104	5435065	231	3325
WST-20-0524	182	-44	243	453103	5435064	231	3325
WST-20-0548A	166	-60	370	453228	5435126	135	3475
WST-20-0554	148	-44	562	453257	5435209	96	3525
WST-20-0569	164	-59	526	453104	5435065	231	3325
WST-20-0570	159	-51	454	453104	5435065	231	3325
WST-20-0574	139	-63	523	452955	5435003	253	3175
WST-20-0575	280	-33	280	453413	5435309	69	3725
WST-20-0602	160	-62	651	453227	5435126	134	3475
WST-20-0603	161	-59	525	453227	5435125	134	3475
WST-20-0606A	141	-56	531	453105	5435065	231	3325
WST-20-0609	188	-56	461	453177	5435126	173	3425
WST-20-0611	118	-63	378	453358	5435273	16	3650
WST-20-0615	177	-58	519	453227	5435125	134	3475
WST-20-0626	194	-59	471	453176	5435125	173	3425
WST-20-0631	136	-3	166	453322	5435235	55	3600

Lynx Zone

Mineralization occurs as grey to translucent quartz-carbonate-pyrite-tourmaline veins and pyrite replacement zones and stockworks. Vein-type mineralization is associated with haloes of pervasive sericite-pyrite ± silica alteration and contain sulphides (predominantly pyrite with minor amounts of chalcopyrite, sphalerite, galena, arsenopyrite, and pyrrhotite) and local visible gold. Replacement mineralization is associated with strong pervasive silica-sericite-ankerite ± tourmaline alteration and contains disseminated pyrite from trace to 80% with local visible gold. Pyrite stockworks can form envelopes that reach several tens of metres thick. Fuchsite alteration is common and is spatially constrained to near the gabbros. Mineralization occurs at or near geological contacts between felsic porphyritic or fragmental intrusions and the host rhyolites or gabbros and locally can be hosted along the gabbro-rhyolite contact.

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 55-80% 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. NQ core assays 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, Vancouver, British Colombia, Lima, Peru or Vientiane, Laos (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 a Four Acid Digestion-ICP-MS 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 Gold Deposit

The Windfall 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 news release dated February 17, 2021 and supported by the technical report entitled “Mineral Resource Estimate Update for the Windfall Project, Eeyou Istchee James Bay, Québec, Canada” dated March 8, 2021 (with an effective date of November 30, 2020), and assuming a cut-off grade of 3.50 g/t Au, comprises 521,000 tonnes at 11.3 g/t Au (189,000 ounces) in the measured mineral resource category, 5,502,000 tonnes at 9.4 g/t Au (1,668,000 ounces) in the indicated mineral resource category and 16,401,000 tonnes at 8.0 g/t Au (4,244,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the February 17, 2021 news release are further described in the full technical report prepared by BBA Inc. in accordance with NI 43-101 and is available on SEDAR (www.sedar.com) under the Corporation’s issuer profile. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal zones: Lynx, Main Zone, and Underdog. Mineralization is generally comprised of sub-vertical zones following intrusive porphyry contacts plunging to the northeast. The resources are defined from surface to a depth of 1,600 metres as it now includes the Triple 8 (T8) zone. The resources excluding T8 are defined from surface to a depth of 1,200 metres. The deposit remains open along strike and at depth. Mineralization has been identified at surface in some areas and as deep as 2,625 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 gold resource properties in Canada. Osisko holds a 100% interest in the high-grade Windfall 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 Quévillon area (over 2,700 square kilometres).

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. Any statement that involves 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”, “potential”, “feasibility”, “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 news release contains the forward-looking information pertaining to, among other things: the Windfall gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in this news release; the prospects, if any, of the Windfall gold deposit; timing and ability of Osisko to file a technical report for the mineral resource estimate disclosed in this news release; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; the amount and type of drilling to be completed and the timing to complete such drilling; the focus of the remaining infill drilling; the trend of grade increase; the Lynx zone remaining open to expansion down plunge; upgrading a inferred mineral resource to a measured mineral resource or indicated mineral resource category; future drilling at the Windfall gold deposit; the significance of historic exploration activities and results. 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 (infill) drilling; property and royalty interests in the Windfall gold deposit; the ability of the Corporation to obtain required approvals; 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.

CONTACT INFORMATION:

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

OSISKO EXPANSION DRILLING ADDS NEW HIGH GRADE AT WINDFALL

Posted on March 15, 2021November 8, 2023 by lboivin

58.7 g/t Au Over 4.6 Metres in Caribou

(Toronto, March 15, 2021) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Significant new analytical results presented below include 40 intercepts in 18 drill holes (15 from surface, 3 from underground) and 11 wedges. The intercepts are located outside the February 2021 mineral resource estimate (see Osisko news release dated February 17, 2021) and either expand resource wireframes or are located in a defined zone or corridor but do not yet correlate to a specific wireframe.

Osisko Chief Executive Officer John Burzynski commented: “Windfall continues to grow in scale across the deposit as demonstrated by today’s results in five different zones, all of which still remain open to growth.”

Selected intercepts include: 58.7 g/t Au over 4.6 metres in OSK-W-20-2421; 39.2 g/t Au over 2.5 metres in OSK-W-20-2399-W1; 36.8 g/t Au over 2.3 metres in OSK-W-20-2410-W1; 21.2 g/t Au over 3.6 metres in OSK-W-21-2467-W1; and 36.2 g/t Au over 2.0 metres in OSK-W-21-2462. Maps showing hole locations and full analytical results are available at www.osiskomining.com

Expansion Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-20-2354-W1	705.8	707.8	2.0	3.62		Caribou	Caribou
including	706.6	707.1	0.5	12.5		Caribou	Caribou
OSK-W-20-2354-W2	633.5	638.1	4.6	8.60		Caribou	Caribou
including	633.5	634.9	1.4	20.0		Caribou	Caribou
OSK-W-20-2354-W4	629.0	633.0	4.0	11.2		Caribou	Caribou
including	629.0	630.0	1.0	34.8		Caribou	Caribou
OSK-W-20-2359	673.0	675.0	2.0	4.87		Caribou	Caribou
OSK-W-20-2366	299.9	302.0	2.1	3.61		Caribou	Caribou
OSK-W-20-2377-W1	889.5	895.5	6.0	7.36		Caribou	Caribou
including	889.5	890.0	0.5	25.5		Caribou	Caribou
OSK-W-20-2387	575.5	577.5	2.0	4.70		Caribou	Caribou
including	576.1	576.6	0.5	15.2		Caribou	Caribou
OSK-W-20-2387-W1	521.0	523.0	2.0	18.8		Caribou	Caribou
including	521.8	523.0	1.2	29.7		Caribou	Caribou
OSK-W-20-2390	622.6	625.0	2.4	4.91		Caribou	Caribou
including	623.8	624.5	0.7	14.7		Caribou	Caribou
OSK-W-20-2399-W1	621.5	624.0	2.5	39.2		Caribou	Caribou
	650.0	652.4	2.4	6.67		Caribou	Caribou
including	651.0	651.4	0.4	36.5		Caribou	Caribou
OSK-W-20-2399-W2	580.0	582.4	2.4	3.83		Caribou	Caribou
including	582.1	582.4	0.3	18.5		Caribou	Caribou
	656.0	658.0	2.0	3.66		Caribou	Caribou
OSK-W-20-2400	768.0	770.2	2.2	4.20		Caribou	Caribou
OSK-W-20-2401	382.0	384.0	2.0	6.16		Caribou	Caribou
including	382.0	383.0	1.0	11.8		Caribou	Caribou
OSK-W-20-2407-W1	686.0	688.0	2.0	9.14		Underdog	Underdog
including	686.5	687.0	0.5	29.5		Underdog	Underdog
OSK-W-20-2410-W1	720.7	723.0	2.3	36.8		Caribou	Caribou
including	722.0	723.0	1.0	67.0		Caribou	Caribou
OSK-W-20-2414	837.0	839.1	2.1	3.92		Caribou	Caribou
OSK-W-20-2415-W1	453.0	455.0	2.0	24.7	20.2	Caribou	Caribou
including	453.9	454.3	0.4	123	100	Caribou	Caribou
OSK-W-20-2421	530.0	532.1	2.1	6.56		Caribou	Caribou
including	530.0	531.0	1.0	13.3		Caribou	Caribou
	534.0	538.6	4.6	58.7	40.6	Caribou	Caribou
including	536.0	537.0	1.0	123	100
and	537.0	537.4	0.4	251	100
OSK-W-20-2424	109.2	111.5	2.3	4.70		F11	F11
including	109.8	110.3	0.5	17.8		F11	F11
OSK-W-20-2433	78.0	80.0	2.0	3.60		F11	F11
including	78.8	79.3	0.5	13.9		F11	F11
	216.0	218.0	2.0	3.95		F11	F11
including	216.0	216.5	0.5	11.7		F11	F11
OSK-W-20-2439	45.3	48.0	2.7	4.05		F11	F11
OSK-W-21-2451	647.4	649.4	2.0	4.90		Caribou	Caribou
including	648.0	648.4	0.4	15.0		Caribou	Caribou
	748.0	750.5	2.5	19.1		Caribou	Caribou
OSK-W-21-2460	535.8	538.0	2.2	18.8		Caribou	Caribou
	724.6	726.7	2.1	3.95		Caribou	Caribou
OSK-W-21-2462	480.0	482.0	2.0	36.2	25.7	Caribou	Caribou
including	480.9	481.4	0.5	142	100	Caribou	Caribou
	678.0	680.4	2.4	5.78		Caribou	Caribou
OSK-W-21-2466	539.0	541.0	2.0	9.76		Caribou	Caribou
OSK-W-21-2467-W1	421.0	423.0	2.0	3.65		Caribou	Caribou
	602.0	604.0	2.0	21.9		Caribou	Caribou
including	603.0	604.0	1.0	43.6		Caribou	Caribou
	636.1	639.7	3.6	21.2		Caribou	Caribou
including	636.1	636.6	0.5	89.3		Caribou	Caribou
	687.0	689.0	2.0	14.0		Caribou	Caribou
including	687.0	688.0	1.0	25.0		Caribou	Caribou
WST-20-0519	148.0	150.0	2.0	6.76		Z27	Zone 27
WST-20-0558	98.0	100.0	2.0	4.57		Bobcat	Bobcat
including	98.4	99.1	0.7	12.8		Bobcat	Bobcat
	166.0	168.0	2.0	7.15		Bobcat	Bobcat
including	167.7	168.0	0.3	47.5		Bobcat	Bobcat
WST-20-0566A	93.9	96.3	2.4	3.57		Z27	Zone 27
including	95.0	95.6	0.6	12.0		Z27	Zone 27

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below.

Drill hole location

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-20-2354-W1	336	-60	792	452739	5434474	401	2725
OSK-W-20-2354-W2	336	-60	750	452739	5434474	401	2725
OSK-W-20-2354-W4	336	-60	783	452739	5434474	401	2725
OSK-W-20-2359	335	-61	726	452694	5434440	401	2675
OSK-W-20-2366	323	-55	534	452682	5434624	398	2750
OSK-W-20-2377-W1	132	-49	1314	452702	5435548	409	3225
OSK-W-20-2387	336	-59	717	452694	5434440	401	2675
OSK-W-20-2387-W1	336	-59	738	452694	5434440	401	2675
OSK-W-20-2390	330	-65	647	452595	5434393	401	2550
OSK-W-20-2399-W1	333	-54	876	452874	5434552	398	2875
OSK-W-20-2399-W2	333	-54	876	452874	5434552	398	2875
OSK-W-20-2400	336	-53	884	452876	5434419	402	2825
OSK-W-20-2401	330	-55	705	452688	5434637	397	2750
OSK-W-20-2407-W1	347	-55	1044	452315	5434419	399	2325
OSK-W-20-2410-W1	338	-62	750	452727	5434358	402	2650
OSK-W-20-2414	337	-54	882	452880	5434419	402	2825
OSK-W-20-2415-W1	328	-54	762	452738	5434474	401	2725
OSK-W-20-2421	332	-59	699	452632	5434280	400	2525
OSK-W-20-2424	150	-45	267	452638	5436000	403	3375
OSK-W-20-2433	148	-47	411	452558	5436073	405	3350
OSK-W-20-2439	147	-50	360	452515	5436029	406	3275
OSK-W-21-2451	330	-58	803	452809	5434415	404	2750
OSK-W-21-2460	332	-55	789	452732	5434537	399	2750
OSK-W-21-2462	338	-57	888	452874	5434552	398	2875
OSK-W-21-2466	330	-66	639	452597	5434393	401	2550
OSK-W-21-2467-W1	331	-54	708	452687	5434471	402	2675
WST-20-0519	136	-45	162	452282	5434976	262	2575
WST-20-0558	155	-32	169	452955	5435003	253	3175
WST-20-0566A	132	-16	368	452208	5434898	248	2475

Caribou Zone

Mineralization most commonly occurs in gold-bearing pyrite stockworks as well as semi-massive pyrite replacement zones associated with phyllic alteration (sericite-pyrite ± silica) with sulphides, pyrite dominated with minor chalcopyrite and sphalerite ranging from trace to up to 20%, and local visible gold. Mineralization is hosted in rhyolites or mafic-intermediate volcanics frequently at or near faults or the contact with felsic porphyritic intrusions.

Zone 27

Mineralization most commonly occurs as replacement-type characterized by 5% to 50% disseminated, stringer, semi-massive or stockwork pyrite, ptygmatic tourmaline veins, quartz-tourmaline crustiform veins, local quartz-carbonate veins, and local visible gold. Mineralization is associated with moderate to strong sericite, weak to strong silica, weak chlorite and carbonate and locally weak fuchsite and is hosted in strongly altered andesites, in or at the contact of the rhyolite, or along the contacts with felsic porphyritic intrusions.

F-Zone

Mineralization is hosted in sheared andesites with carbonate replacement or quartz veining and occurs as quartz ± ankerite veinlets or as replacement type in shear zones and is characterised by trace to 10% pyrite with local visible gold. Alteration is dominated by sericite-fuchsite-tourmaline-pyrite.

Bobcat

Mineralization most commonly occurs in gold-bearing quartz-pyrite veins controlled by northeast trending faults and shears and to a lesser extent in minor crustiform quartz-tourmaline-ankerite-pyrite veins and pyrite replacement zones and stockwork. Mineralization is hosted in sheared mafic volcanics, rhyolites near faults, or at the contact with felsic porphyritic intrusions.

Underdog

Mineralization most commonly occurs in gold-bearing quartz-pyrite (± tourmaline) veins and as disseminated, stringer, semi-massive to massive pyrite with minor sphalerite, chalcopyrite and molybdenite associated with strong sericite and silica alteration. Mineralization is hosted along the intrusive contacts of a three-phase composite felsic porphyritic unit which cross-cuts felsic and mafic volcanic sequences.

Qualified Person

Quality Control and Reporting Protocols

About the Windfall Gold Deposit

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 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 Quévillon area (over 2,700 square kilometres).

Cautionary Note Regarding Forward-Looking Information

CONTACT INFORMATION:

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

OSISKO MINING ORDERS MILLING EQUIPMENT FOR WINDFALL

Posted on March 9, 2021November 8, 2023 by lboivin

(Toronto, March 9, 2021) Osisko Mining Inc. (OSK:TSX: “Osisko” or the “Corporation”) is pleased to announce that it has placed an order for grinding equipment and ancillaries from FLSmidth, a leading technology and equipment supply company, for its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

The order consists of a 7.3 meters (24 foot) diameter x 3.4 meters (11 foot) long gear-driven semi-autogenous grinding (SAG) mill and a 5.2 meters (17 foot) diameter x 9.4 meters (31 foot) long gear-driven ball mill. Current planning foresees installation and operation of the grinding mills in a SABC[1] configuration. The grinding mills have a capacity of processing up to 176.6 dry tonnes per hour, or 3,900 tonnes per day based on 92% availability. The equipment is expected to be delivered to the Windfall project in the second half of 2022. Installation will follow pending successful receipt of all permits and authorizations.

John Burzynski, Chief Executive Officer of Osisko commented: “FLSmidth is a recognized global leader in grinding technologies with a long track record of providing high quality products, and we are looking forward to be working with them on our developing Windfall project. Securing these critical long lead time components of the grinding circuit is an important first step in solidifying detailed engineering for the Windfall plant. We continue to advance all aspects of work on Windfall including our environmental assessment and consultation with our host communities and look forward to additional near-term announcements regarding our infrastructure plans.”

About the Windfall Gold Deposit

The Windfall 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 news release dated February 17, 2021 and assuming a cut-off grade of 3.50 g/t Au, comprises 521,000 tonnes at 11.3 g/t Au (189,000 ounces) in the measured mineral resource category, 5,502,000 tonnes at 9.4 g/t Au (1,668,000 ounces) in the indicated mineral resource category and 16,401,000 tonnes at 8.0 g/t Au (4,244,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the February 17, 2021 news release, certain of which are described in the February 17, 2021 news release, will be further described in the full technical report being prepared for this updated mineral resource estimate in accordance with NI 43-101, and will be available on SEDAR (www.sedar.com) under the Corporation’s issuer profile within 45 days from February 17, 2021. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal zones: Lynx, Main Zone, and Underdog. Mineralization is generally comprised of sub-vertical zones following intrusive porphyry contacts plunging to the northeast. The resources are defined from surface to a depth of 1,600 metres as it now includes the Triple 8 (T8) zone. The resources excluding T8 are defined from surface to a depth of 1,200 metres. The deposit remains open along strike and at depth. Mineralization has been identified at surface in some areas and as deep as 2,625 metres in others with significant potential to extend mineralization down-plunge and at depth.

About Osisko Mining Inc.

About FLSmidth

FlSmidth is the market-leading supplier of sustainable productivity to the global mining and cement industries. Headquartered in Copenhagen, Denmark, and with offices in more than 50 countries including Canada, FLSmidth delivers engineering, equipment and service solutions to customers worldwide. Productivity, sustainability, and quality are focus areas for the 12,000 employees in FLSmidth.

Cautionary Note Regarding Forward-Looking Information

CONTACT INFORMATION:

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

[1] In a SABC configuration, the SAG and ball mill are in closed circuit, with the SAG mill closed with a crusher to control the amount of ‘critical size’ material in the circuit.

OSISKO FILES TECHNICAL REPORT FOR WINDFALL MINERAL RESOURCE ESTIMATE UPDATE

Posted on March 8, 2021November 8, 2023 by lboivin

(Toronto, March 8, 2021) Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to announce that it has filed a technical report in accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects to update the mineral resource estimate on its 100% owned Windfall gold deposit. The technical report entitled “Mineral Resource Estimate Update for the Windfall Project, Eeyou Istchee James Bay, Québec, Canada” and dated March 8, 2021 (effective date of November 30, 2020) has been prepared for Osisko by BBA Inc. The technical report is available on SEDAR (www.sedar.com) under Osisko’s issuer profile.

About Osisko Mining Inc.

Cautionary Statements Regarding Mineral Resource Estimate

Readers are cautioned that mineral resources are not mineral reserves and that the economic viability of mineral resources that are not mineral reserves has not been demonstrated. The mineral resource estimate described in this news release may be materially affected by geology, environmental, permitting, legal, title, socio-political, marketing or other relevant issues. 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 National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“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.

CONTACT INFORMATION:

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

OSISKO WINDFALL INFILLS WITH HIGH-GRADE IN MULTIPLE ZONES 35.7 g/t Au Over 9.8 Metres in Underdog 65.6 g/t Au over 4.2 meters in Caribou

Posted on March 3, 2021November 8, 2023 by lboivin

(Toronto, March 03, 2021) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Today’s infill results are from the southwestern areas of the deposit including Zone 27, Underdog, Caribou, F11, Mallard, and Bobcat. Osisko Chief Executive Officer John Burzynski commented: “Infill drilling continues to deliver impressive grade and width results from the Windfall deposit.”

The table below contains resource definition infill intercepts located inside defined February 2021 mineral resource estimate blocks (see Osisko news release dated February 17, 2021). Significant new analytical results are presented below, including 73 intercepts in 33 drill holes (24 from surface, 9 from underground) and 10 wedges.

Selected intercepts include: 35.7 g/t Au over 9.8 metres, 70.7 g/t Au over 2.0 metres, and 50.4 g/t Au over 3.6 metres in OSK-W-20-2407; 65.6 g/t Au over 4.2 metres in OSK-W-20-2390; 60.8 g/t Au over 2.0 metres in OSK-W-20-2405; 39.0 g/t Au over 3.0 metres in OSK-W-20-2400; 55.2 g/t Au over 2.0 metres in OSK-W-20-2399 and 18.9 g/t Au over 5.5 metres in OSK-W-20-2354-W2. Maps showing hole locations and full analytical results are available at www.osiskomining.com

Infill Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-20-852-W4	725.0	727.0	2.0	6.83		Caribou_2212	Caribou
including	725.6	726.0	0.4	27.6		Caribou_2212	Caribou
OSK-W-20-913-W1	634.7	637.0	2.3	3.39		Caribou_2523	Caribou
including	634.7	635.0	0.3	18.6		Caribou_2523	Caribou
	851.0	853.3	2.3	11.1		Caribou_2219	Caribou
including	851.0	851.5	0.5	47.2		Caribou_2219	Caribou
OSK-W-20-913-W2	715.0	717.8	2.8	3.89		Caribou_2210	Caribou
	846.0	848.0	2.0	15.5		Caribou_2219	Caribou
including	846.0	846.7	0.7	44.0		Caribou_2219	Caribou
OSK-W-20-2354-W1	647.0	650.5	3.5	14.6		Caribou_2233	Caribou
	674.2	677.4	3.2	24.7		Caribou_2208	Caribou
including	677.0	677.4	0.4	77.9		Caribou_2208	Caribou
OSK-W-20-2354-W2	641.0	646.5	5.5	18.9		Caribou_2233	Caribou
including	642.8	643.1	0.3	61.9		Caribou_2233	Caribou
OSK-W-20-2354-W3	632.0	635.0	3.0	8.61		Caribou_2214	Caribou
	665.7	670.0	4.3	7.53		Caribou_2208	Caribou
including	669.0	670.0	1.0	17.1		Caribou_2208	Caribou
OSK-W-20-2354-W4	498.8	501.0	2.2	3.79		Caribou	Caribou
	649.0	651.0	2.0	6.43		Caribou_2233	Caribou
	673.0	676.0	3.0	16.7		Caribou_2208	Caribou
	708.0	711.0	3.0	4.97		Caribou_2220	Caribou
OSK-W-20-2359	360.8	363.0	2.2	5.96		Caribou	Caribou
OSK-W-20-2359-W1	361.0	363.0	2.0	6.17		Caribou	Caribou
	662.0	664.9	2.9	4.88		Caribou_2206	Caribou
OSK-W-20-2366	459.0	461.0	2.0	4.90		Caribou_2210	Caribou
including	460.0	461.0	1.0	9.13		Caribou_2210	Caribou
OSK-W-20-2373	600.0	602.0	2.0	3.14		Caribou_2241	Caribou
including	600.6	601.4	0.8	7.07		Caribou_2241	Caribou
OSK-W-20-2376	320.3	322.3	2.0	3.56		Caribou_2116	Caribou
	432.6	436.0	3.4	5.32		Caribou_2235	Caribou
including	435.0	436.0	1.0	13.3		Caribou_2235	Caribou
OSK-W-20-2377	741.0	743.2	2.2	3.22		Caribou_2553	Caribou
OSK-W-20-2387	661.2	663.2	2.0	8.69		Caribou_2233	Caribou
OSK-W-20-2388	537.0	539.7	2.7	4.76		Caribou_2215	Caribou
	610.7	614.2	3.5	13.8		Caribou_2217	Caribou
including	610.7	611.0	0.3	87.5		Caribou_2217	Caribou
	639.3	641.8	2.5	4.14		Caribou_2218	Caribou
including	640.4	641.1	0.7	11.0		Caribou_2218	Caribou
	645.4	647.5	2.1	3.87		Caribou_2218	Caribou
including	646.0	646.5	0.5	16.1		Caribou_2218	Caribou
OSK-W-20-2390	594.8	599.0	4.2	65.6	51.2	Caribou_2241	Caribou
including	596.9	597.2	0.3	147	100
and	597.5	598.1	0.6	178	100
OSK-W-20-2399	673.0	675.0	2.0	55.2	20.2	Caribou_2212	Caribou
including	674.0	674.4	0.4	275	100	Caribou_2212	Caribou
OSK-W-20-2400	750.0	753.0	3.0	39.0	36	Caribou_2215	Caribou
including	752.0	753.0	1.0	109	100	Caribou_2215	Caribou
	797.0	802.0	5.0	6.32		Caribou_2220	Caribou
including	798.0	799.0	1.0	16.4		Caribou_2220	Caribou
	858.0	861.7	3.7	6.19		Caribou_2219	Caribou
including	860.0	861.3	1.3	12.6		Caribou_2219	Caribou
OSK-W-20-2405	262.0	264.0	2.0	60.8	42.4	Caribou_2106	Caribou
including	262.7	263.5	0.8	146	100	Caribou_2106	Caribou
	622.0	624.0	2.0	4.35		Caribou_2214	Caribou
including	622.0	622.6	0.6	11.2		Caribou_2214	Caribou
	626.5	630.0	3.5	16.8		Caribou_2214	Caribou
including	627.5	628.0	0.5	56.0		Caribou_2214	Caribou
OSK-W-20-2405-W1	655.9	657.9	2.0	16.6		Caribou_2233	Caribou
including	656.5	657.0	0.5	44.4		Caribou_2233	Caribou
OSK-W-20-2407	662.0	665.6	3.6	50.4	46.6	Underdog_4101	Underdog
including	663.6	664.4	0.8	184	100	Underdog_4101	Underdog
	681.0	683.0	2.0	3.77		Underdog_4100	Underdog
	690.0	699.8	9.8	35.7		Underdog_4100	Underdog
including	690.0	691.0	1.0	85.0
and	695.0	696.0	1.0	76.4
	705.0	707.0	2.0	70.7	21.9	Underdog_4102	Underdog
including	706.3	706.7	0.4	344	100	Underdog_4102	Underdog
OSK-W-20-2410	686.4	688.4	2.0	6.69		Caribou_2214	Caribou
OSK-W-20-2414	628.0	630.0	2.0	12.0		Caribou_2524	Caribou
including	629.0	630.0	1.0	23.7		Caribou_2524	Caribou
OSK-W-20-2415	608.8	611.0	2.2	9.96		Caribou_2211	Caribou
including	608.8	609.2	0.4	45.9		Caribou_2211	Caribou
	703.4	707.4	4.0	17.4		Caribou_2220	Caribou
including	703.4	703.7	0.3	78.4		Caribou_2220	Caribou
OSK-W-20-2415-W1	638.3	643.2	4.9	12.0		Caribou_2233	Caribou
including	638.3	639.3	1.0	32.5		Caribou_2233	Caribou
OSK-W-20-2425	621.0	624.1	3.1	19.3	14.2	Caribou_2220	Caribou
including	623.8	624.1	0.3	152	100	Caribou_2220	Caribou
	709.4	711.4	2.0	3.91		Caribou_2219	Caribou
including	710.0	710.6	0.6	11.5		Caribou_2219	Caribou
OSK-W-20-2432	749.6	751.7	2.1	11.0		Caribou_2208	Caribou
including	750.2	750.9	0.7	28.9		Caribou_2208	Caribou
OSK-W-20-2437	608.4	610.4	2.0	6.62		Caribou_2214	Caribou
including	608.4	609.1	0.7	17.6		Caribou_2214	Caribou
OSK-W-20-2438	600.0	603.9	3.9	10.4		Caribou_2211	Caribou
including	600.0	601.0	1.0	18.6		Caribou_2211	Caribou
OSK-W-20-2440	690.0	692.0	2.0	6.68		Caribou_2217	Caribou
	702.0	705.0	3.0	10.3		Caribou_2220	Caribou
	738.0	740.0	2.0	3.29		Caribou_2218	Caribou
OSK-W-21-2444	451.2	453.4	2.2	4.06		Caribou_2236	Caribou
	558.1	562.1	4.0	17.5		Caribou_2215	Caribou
including	561.1	562.1	1.0	38.1		Caribou_2215	Caribou
	572.0	574.0	2.0	4.30		Caribou_2250	Caribou
including	572.9	573.2	0.3	19.8		Caribou_2250	Caribou
OSK-W-21-2451	729.0	734.6	5.6	8.55		Caribou_2208	Caribou
including	734.0	734.6	0.6	34.0		Caribou_2208	Caribou
	739.5	742.3	2.8	20.7		Caribou_2208	Caribou
OSK-W-21-2455	594.0	596.1	2.1	5.35		Caribou_2211	Caribou
	666.7	668.8	2.1	3.55		Caribou_2208	Caribou
OSK-W-21-2460	438.9	441.7	2.8	9.51		Caribou_2116	Caribou
including	441.4	441.7	0.3	28.0		Caribou_2116	Caribou
WST-20-0479B	36.4	38.5	2.1	4.19		Mallard_5208	Mallard
	269.0	271.0	2.0	9.08		Z27_1123	Zone 27
including	269.0	270.0	1.0	18.0		Z27_1123	Zone 27
WST-20-0517	77.4	79.5	2.1	18.9		Mallard_5211	Mallard
including	77.4	78.0	0.6	47.1		Mallard_5211	Mallard
WST-20-0519	59.0	61.0	2.0	6.07		Mallard_5208	Mallard
WST-20-0520	176.2	178.3	2.1	6.20		Z27_1123	Zone 27
including	176.2	176.7	0.5	20.5		Z27_1123	Zone 27
WST-20-0521	191.3	193.7	2.4	4.40		Z27_1102	Zone 27
	195.2	197.2	2.0	4.76		Z27_1102	Zone 27
	231.9	234.3	2.4	7.99		Z27_1123	Zone 27
including	233.9	234.3	0.4	31.7		Z27_1123	Zone 27
WST-20-0555	118.8	121.6	2.8	10.8		Bobcat_2350	Bobcat
including	119.5	119.9	0.4	24.6
and	121.0	121.6	0.6	23.2
WST-20-0566	13.0	15.3	2.3	5.64		Mallard_5211	Mallard
including	14.0	14.3	0.3	15.7		Mallard_5211	Mallard
WST-20-0566A	255.5	259.3	3.8	13.4		Caribou_2100	Caribou
including	255.8	256.1	0.3	37.6
and	259.0	259.3	0.3	83.6
WST-20-0627	14.0	16.9	2.9	8.32		Mallard_5211	Mallard

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below.

Drill hole location

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-20-852-W4	330	-55	873	452874	5434552	398	2875
OSK-W-20-913-W1	334	-52	939	452878	5434419	401	2825
OSK-W-20-913-W2	334	-52	913	452878	5434419	401	2825
OSK-W-20-2354-W1	336	-60	792	452739	5434474	401	2725
OSK-W-20-2354-W2	336	-60	750	452739	5434474	401	2725
OSK-W-20-2354-W3	336	-60	750	452739	5434474	401	2725
OSK-W-20-2354-W4	336	-60	783	452739	5434474	401	2725
OSK-W-20-2359	335	-61	726	452694	5434440	401	2675
OSK-W-20-2359-W1	335	-61	696	452694	5434440	401	2675
OSK-W-20-2366	323	-55	534	452682	5434624	398	2750
OSK-W-20-2373	335	-65	647	452595	5434393	401	2550
OSK-W-20-2376	325	-55	510	452689	5434637	397	2750
OSK-W-20-2377	132	-49	1326	452702	5435548	409	3225
OSK-W-20-2387	336	-59	717	452694	5434440	401	2675
OSK-W-20-2388	326	-61	699	452715	5434606	397	2775
OSK-W-20-2390	330	-65	647	452595	5434393	401	2550
OSK-W-20-2399	333	-54	864	452874	5434552	398	2875
OSK-W-20-2400	336	-53	884	452876	5434419	402	2825
OSK-W-20-2405	332	-58	723	452694	5434440	401	2675
OSK-W-20-2405-W1	332	-58	716	452694	5434440	401	2675
OSK-W-20-2407	347	-55	993	452315	5434419	399	2325
OSK-W-20-2410	338	-62	768	452727	5434358	402	2650
OSK-W-20-2414	337	-54	882	452880	5434419	402	2825
OSK-W-20-2415	328	-54	755	452738	5434474	401	2725
OSK-W-20-2415-W1	328	-54	762	452738	5434474	401	2725
OSK-W-20-2425	336	-60	747	452715	5434606	397	2775
OSK-W-20-2432	333	-57	864	452809	5434415	404	2750
OSK-W-20-2437	329	-62	630	452597	5434393	401	2550
OSK-W-20-2438	331	-60	729	452695	5434401	402	2650
OSK-W-20-2440	330	-52	807	452738	5434474	401	2725
OSK-W-21-2444	337	-59	636	452715	5434606	397	2775
OSK-W-21-2451	330	-58	803	452809	5434415	404	2750
OSK-W-21-2455	328	-53	780	452738	5434474	401	2725
OSK-W-21-2460	332	-55	786	452732	5434537	399	2750
WST-20-0479B	138	-59	402	452281	5434975	262	2575
WST-20-0517	140	-55	400	452281	5434975	262	2575
WST-20-0519	136	-45	162	452282	5434976	262	2575
WST-20-0520	135	-46	388	452281	5434975	263	2575
WST-20-0521	153	-57	385	452281	5434975	262	2575
WST-20-0555	145	-25	160	452955	5435003	254	3175
WST-20-0566	132	-16	20	452208	5434898	248	2475
WST-20-0566A	132	-16	368	452208	5434898	248	2475
WST-20-0627	130	-18	84	452208	5434899	249	2475

Caribou Zone

Underdog

Mineralization most commonly occurs in gold-bearing quartz-pyrite (± tourmaline) veins and as disseminated and stringer semi-massive to massive pyrite with minor sphalerite, chalcopyrite and molybdenite associated with strong sericite and silica alteration. Mineralization is hosted along the intrusive contacts of a three-phase composite felsic porphyritic unit which cross-cuts felsic and mafic volcanic sequences.

F-Zone

Mineralization is hosted in sheared andesites with carbonate replacement or quartz veining and occurs as quartz ± ankerite veinlets or in shear zones as replacement, characterised by trace to 10% pyrite with local visible gold. Alteration is dominated by sericite-fuchsite-tourmaline-pyrite.

Bobcat

Mallard

Mineralization is hosted in sheared mafic volcanics with felsic porphyritic intrusions and occurs as veins associated with sericite-pyrite ± silica ± chlorite alteration and contains pyrite ranging from trace to 30% and local visible gold.

Qualified Person

Quality Control and Reporting Protocols

About the Windfall Gold Deposit

The Windfall 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 news release dated February 17, 2021 and assuming a cut-off grade of 3.50 g/t Au, comprises 521,000 tonnes at 11.3 g/t Au (189,000 ounces) in the measured mineral resource category, 5,502,000 tonnes at 9.4 g/t Au (1,668,000 ounces) in the indicated mineral resource category and 16,401,000 tonnes at 8.0 g/t Au (4,244,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the February 17, 2021 news release, certain of which are described in the February 17, 2021 news release, will be further described in the full technical report being prepared for this updated mineral resource estimate in accordance with NI 43-101, and will be available on SEDAR (www.sedar.com) under the Corporation’s issuer profile within 45 days from February 17, 2021. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal zones: Lynx, Main Zone, and Underdog. Mineralization is generally comprised of sub-vertical zones following intrusive porphyry contacts plunging to the northeast. The resources are defined from surface to a depth of 1,600 metres as it now includes the Triple 8 (T8) zone. The resources excluding T8 are defined from surface to a depth of 1,200 metres. The deposit remains open along strike and at depth. Mineralization has been identified at surface in some areas and as deep as 2,625 metres in others with significant potential to extend mineralization down-plunge and at depth.

About Osisko Mining Inc.

Cautionary Note Regarding Forward-Looking Information

CONTACT INFORMATION:

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

OSISKO INFILL CONTINUES TO DELIVER WITH 342 g/t Au OVER 2.5 METRES

Posted on March 1, 2021November 8, 2023 by Yannick Fradette

(Toronto, March 1st, 2021) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Infill drilling is currently focused on the Lynx deposit. Osisko Chief Executive Officer John Burzynski commented: “Lynx continues to deliver with high-grade and width as we infill the mineral resource estimate (“MRE”) areas published earlier this month.”

The table below contains resource definition infill intercepts located inside defined February 2021 MRE blocks (see Osisko news release dated February 17, 2021). Significant new analytical results are presented below, including 80 intercepts in 21 drill holes (7 from surface, 14 from underground) and 26 wedges.

Select intercepts include: 342 g/t Au over 2.5 metres in OSK-W-20-1432-W2; 37.7 g/t Au over 7.2 metres in OSK-W-20-2283-W5; 56.4 g/t Au over 4.0 metres, 18.3 g/t Au over 5.5 metres and 45.3 g/t Au over 2.1 metres in OSK-W-20-2256-W8; 79.8 g/t Au over 2.4 metres in OSK-W-20-2397; 63.8 g/t Au over 2.4 metres in OSK-W-20-2271-W6; 36.0 g/t Au over 2.7 metres in WST-20-0548A; 42.2 g/t Au over 2.0 metres in OSK-W-20-2280-W6; and 21.1 g/t Au over 4.0 metres in OSK-W-20-2283-W4. Maps showing hole locations and full analytical results are available at www.osiskomining.com

Infill Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-20-1432-W2	959.5	962.0	2.5	342	72.1	LX4_3437	Lynx
including	960.2	961.0	0.8	596	100	LX4_3437	Lynx
OSK-W-20-2133-W4	966.4	969.0	2.6	3.85		TLX_3188	Triple Lynx
OSK-W-20-2170-W7	971.0	973.0	2.0	25.5		TLX_3163	Triple Lynx
including	971.0	972.0	1.0	41.1		TLX_3163	Triple Lynx
	995.0	997.5	2.5	4.18		TLX_3163	Triple Lynx
	1051.0	1053.0	2.0	4.07		TLX_3162	Triple Lynx
OSK-W-20-2252-W5	901.0	903.0	2.0	3.30		TLX_3185	Triple Lynx
OSK-W-20-2252-W10	939.9	942.0	2.1	3.31		TLX_3163	Triple Lynx
OSK-W-20-2256-W8	872.5	877.0	4.5	4.39		TLX_3189	Triple Lynx
	883.2	887.0	3.8	4.17		TLX_3161	Triple Lynx
including	886.0	886.5	0.5	8.68		TLX_3161	Triple Lynx
	888.5	890.5	2.0	7.73		TLX_3161	Triple Lynx
including	889.4	889.9	0.5	30.2		TLX_3161	Triple Lynx
	901.7	905.7	4.0	56.4	48.5	TLX_3161	Triple Lynx
including	901.7	902.2	0.5	139	100
and	903.0	903.5	0.5	125	100
	907.7	913.2	5.5	18.3		TLX_3161	Triple Lynx
including	911.7	912.5	0.8	44.5		TLX_3161	Triple Lynx
	921.0	923.1	2.1	45.3		TLX_3161	Triple Lynx
including	922.1	923.1	1.0	92.7		TLX_3161	Triple Lynx
	961.0	966.3	5.3	13.4		TLX_3163	Triple Lynx
including	965.7	966.3	0.6	87.2		TLX_3163	Triple Lynx
	972.0	974.0	2.0	3.59		TLX_3163	Triple Lynx
	1001.2	1003.6	2.4	13.8		TLX_3164	Triple Lynx
including	1002.2	1002.6	0.4	40.5		TLX_3164	Triple Lynx
OSK-W-20-2271-W3	1093.0	1095.0	2.0	4.59		LX4_3440	Lynx
OSK-W-20-2271-W4	1085.0	1087.0	2.0	9.68		LX4_3418	Lynx
including	1085.0	1085.5	0.5	21.0		LX4_3418	Lynx
OSK-W-20-2271-W5	825.5	828.0	2.5	29.5	12.4	LXM_3317	Lynx
including	826.2	826.5	0.3	242	100	LXM_3317	Lynx
	1177.2	1179.8	2.6	6.19		LX4_3430	Lynx
OSK-W-20-2271-W6	849.0	851.0	2.0	5.07		LXM_3345	Lynx
	1131.6	1133.7	2.1	10.5		LX4_3434	Lynx
including	1132.7	1133.0	0.3	46.1		LX4_3434	Lynx
	1135.6	1138.0	2.4	63.8	26.7	LX4_3434	Lynx
including	1137.3	1137.7	0.4	323	100	LX4_3434	Lynx
OSK-W-20-2280-W2	1096.4	1098.8	2.4	6.46		TLX_3170	Triple Lynx
OSK-W-20-2280-W6	916.0	918.1	2.1	3.88		TLX_3161	Triple Lynx
including	916.7	917.1	0.4	16.3		TLX_3161	Triple Lynx
	951.0	953.7	2.7	3.43		TLX_3180	Triple Lynx
	956.0	958.0	2.0	3.64		TLX_3180	Triple Lynx
	965.0	967.0	2.0	42.2		TLX_3180	Triple Lynx
including	966.0	967.0	1.0	82.8		TLX_3180	Triple Lynx
	1033.1	1036.0	2.9	4.53		TLX_3164	Triple Lynx
including	1033.4	1033.8	0.4	25.0		TLX_3164	Triple Lynx
	1062.6	1064.9	2.3	7.50		TLX_3162	Triple Lynx
including	1063.5	1064.3	0.8	20.5		TLX_3162	Triple Lynx
OSK-W-20-2280-W7	1017.2	1019.6	2.4	4.06		TLX_3164	Triple Lynx
OSK-W-20-2280-W9	979.0	981.0	2.0	3.17		TLX_3180	Triple Lynx
	985.0	987.0	2.0	4.84		TLX_3180	Triple Lynx
including	986.7	987.0	0.3	21.0		TLX_3180	Triple Lynx
	1020.0	1022.5	2.5	5.00		TLX_3183	Triple Lynx
	1066.1	1069.0	2.9	5.01		TLX_3164	Triple Lynx
including	1066.1	1066.4	0.3	26.0		TLX_3164	Triple Lynx
	1082.0	1089.0	7.0	4.51		TLX_3162	Triple Lynx
including	1087.7	1088.1	0.4	22.2		TLX_3162	Triple Lynx
OSK-W-20-2283-W3	787.0	789.0	2.0	5.52		TLX_3171	Triple Lynx
including	788.0	788.3	0.3	35.6		TLX_3171	Triple Lynx
	805.0	807.0	2.0	3.51		TLX_3184	Triple Lynx
OSK-W-20-2283-W4	792.0	796.0	4.0	21.1		TLX_3171	Triple Lynx
	808.0	810.9	2.9	9.76		TLX_3184	Triple Lynx
including	809.1	810.0	0.9	19.6		TLX_3184	Triple Lynx
	921.0	926.0	5.0	5.16		TLX_3194	Triple Lynx
including	922.7	924.0	1.3	13.9		TLX_3194	Triple Lynx
OSK-W-20-2283-W5	803.8	811.0	7.2	37.7		TLX_3171	Triple Lynx
including	807.7	809.0	1.3	76.5		TLX_3171	Triple Lynx
OSK-W-20-2283-W7	840.0	847.0	7.0	10.4		TLX_3184	Triple Lynx
including	844.0	845.0	1.0	42.3		TLX_3184	Triple Lynx
	849.0	852.0	3.0	6.33		TLX_3184	Triple Lynx
OSK-W-20-2295-W4	882.0	884.3	2.3	26.8	21.5	TLX_3195	Triple Lynx
including	882.4	882.7	0.3	141	100
and	884.0	884.3	0.3	55.8
OSK-W-20-2313-W7	960.0	962.0	2.0	3.92		TLX_3193	Triple Lynx
including	960.7	961.4	0.7	11.0		TLX_3193	Triple Lynx
OSK-W-20-2313-W8	827.8	830.0	2.2	3.82		TLX_3171	Triple Lynx
including	828.6	828.9	0.3	20.8		TLX_3171	Triple Lynx
OSK-W-20-2322-W3	1138.0	1140.2	2.2	6.26		LX4_3430	Lynx
including	1139.6	1140.2	0.6	16.5		LX4_3430	Lynx
OSK-W-20-2346	978.0	980.0	2.0	12.1		LX4_3413	Lynx
	1092.0	1094.1	2.1	3.83		LX4_3438	Lynx
OSK-W-20-2363	630.0	632.1	2.1	16.7		TLX_3178	Triple Lynx
including	630.4	630.9	0.5	62.2		TLX_3178	Triple Lynx
OSK-W-20-2363-W1	955.0	957.0	2.0	7.28		TLX_3195	Triple Lynx
OSK-W-20-2375	887.3	890.0	2.7	9.19		LX4_3414	Lynx
including	888.3	889.0	0.7	31.4		LX4_3414	Lynx
OSK-W-20-2381-W1	1228.0	1230.0	2.0	8.54		LX4_3449	Lynx
including	1228.0	1228.7	0.7	24.3		LX4_3449	Lynx
OSK-W-20-2384	991.0	993.0	2.0	7.24		LX4_3430	Lynx
	1000.5	1003.0	2.5	26.5	22.2	LX4_3430	Lynx
including	1001.2	1001.7	0.5	122	100	LX4_3430	Lynx
	1013.0	1015.0	2.0	19.5		LX4_3430	Lynx
OSK-W-20-2385	755.0	757.3	2.3	17.0		LX4_3426	Lynx
including	755.0	756.0	1.0	38.1		LX4_3426	Lynx
	776.0	778.0	2.0	31.2		LX4_3426	Lynx
including	777.0	777.5	0.5	98.0		LX4_3426	Lynx
OSK-W-20-2385-W1	778.7	781.0	2.3	6.32		LX4_3426	Lynx
including	779.2	779.6	0.4	24.3		LX4_3426	Lynx
OSK-W-20-2394	652.0	654.0	2.0	5.93		TLX_3184	Triple Lynx
including	652.4	652.8	0.4	17.7		TLX_3184	Triple Lynx
OSK-W-20-2394-W1	642.8	645.0	2.2	14.5		TLX_3171	Triple Lynx
including	643.3	643.7	0.4	53.1		TLX_3171	Triple Lynx
OSK-W-20-2397	660.8	664.4	3.6	11.1		LXM_3304	Lynx
including	660.8	661.4	0.6	43.3		LXM_3304	Lynx
	667.5	669.9	2.4	79.8	41.9	LXM_3304	Lynx
including	668.2	669.1	0.9	201	100	LXM_3304	Lynx
	676.9	679.1	2.2	20.5		LXM_3304	Lynx
including	678.1	678.6	0.5	82.9		LXM_3304	Lynx
WST-20-0492	116.9	119.2	2.3	22.3	17.6	LXM_3303	Lynx
including	116.9	117.3	0.4	127	100	LXM_3303	Lynx
WST-20-0524	81.9	86.2	4.3	3.58		LXM_3311	Lynx
WST-20-0548A	67.6	70.3	2.7	36.0		LXM_3339	Lynx
including	67.6	68.3	0.7	64.9		LXM_3339	Lynx
WST-20-0553	131.7	134.1	2.4	8.67		LXM_3303	Lynx
including	132.3	132.8	0.5	33.0		LXM_3303	Lynx
WST-20-0570	70.7	72.7	2.0	8.74		LXM_3361	Lynx
including	70.7	71.7	1.0	16.9		LXM_3361	Lynx
	274.1	276.1	2.0	6.79		LXSW_3556	Lynx SW
including	274.1	275.0	0.9	13.0		LXSW_3556	Lynx SW
WST-20-0571	394.4	396.5	2.1	10.3		LXSW_3502	Lynx SW
including	395.8	396.1	0.3	60.1		LXSW_3502	Lynx SW
WST-20-0572A	285.0	287.0	2.0	6.39		LXSW_3556	Lynx
including	286.0	287.0	1.0	12.6		LXSW_3556	Lynx
WST-20-0577A	75.0	77.5	2.5	12.9		LXM_3303	Lynx
including	75.8	76.7	0.9	35.6		LXM_3303	Lynx
WST-20-0582	129.5	131.5	2.0	9.97		LXM_3339	Lynx
WST-20-0583	117.0	119.0	2.0	3.80		LXM_3307	Lynx
including	118.5	119.0	0.5	8.03		LXM_3307	Lynx
WST-20-0592	129.8	132.0	2.2	4.61		LXM_3303	Lynx
including	130.3	131.0	0.7	13.1		LXM_3303	Lynx
WST-20-0593	118.9	121.4	2.5	4.63		LXM_3303	Lynx
including	118.9	119.9	1.0	11.5		LXM_3303	Lynx
WST-20-0611	262.7	265.2	2.5	26.8		TLX_3161	Triple Lynx
including	262.7	263.6	0.9	66.9		TLX_3161	Triple Lynx
WST-20-0628	112.1	114.5	2.4	6.47		LXM_3334	Lynx
including	113.0	113.5	0.5	18.0		LXM_3334	Lynx

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below. SW = Southwest.

Drill hole location

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-20-1432-W2	132	-55	993	453811	5435779	400	4300
OSK-W-20-2133-W4	118	-49	987	453080	5435531	417	3525
OSK-W-20-2170-W7	128	-59	1205	453425	5435657	413	3900
OSK-W-20-2252-W5	129	-54	1092	453241	5435694	415	3750
OSK-W-20-2252-W10	129	-54	824	453241	5435694	415	3750
OSK-W-20-2256-W8	125	-51	1056	453160	5435686	411	3675
OSK-W-20-2271-W3	120	-53	1235	453462	5435683	410	3950
OSK-W-20-2271-W4	120	-53	1134	453462	5435683	410	3950
OSK-W-20-2271-W5	120	-53	1247	453462	5435683	410	3950
OSK-W-20-2271-W6	120	-53	1232	453462	5435683	410	3950
OSK-W-20-2280-W2	127	-58	1211	453304	5435639	415	3775
OSK-W-20-2280-W6	127	-58	1152	453304	5435639	415	3775
OSK-W-20-2280-W7	127	-58	1131	453304	5435639	415	3775
OSK-W-20-2280-W9	127	-58	1037	453304	5435639	415	3775
OSK-W-20-2283-W3	135	-50	1004	452997	5435607	425	3500
OSK-W-20-2283-W4	135	-50	1012	452997	5435607	425	3500
OSK-W-20-2283-W5	135	-50	1043	452997	5435607	425	3500
OSK-W-20-2283-W7	135	-50	1049	452997	5435607	425	3500
OSK-W-20-2295-W4	132	-51	1082	452933	5435473	415	3375
OSK-W-20-2313-W7	134	-52	1086	452965	5435583	420	3450
OSK-W-20-2313-W8	134	-52	1098	452965	5435583	420	3450
OSK-W-20-2322-W3	130	-54	1274	453608	5435715	403	4075
OSK-W-20-2346	130	-53	1161	453397	5435557	413	3825
OSK-W-20-2363	139	-52	1031	452930	5435548	419	3425
OSK-W-20-2363-W1	139	-52	1059	452930	5435548	419	3425
OSK-W-20-2375	122	-56	1160	453810	5435779	400	4300
OSK-W-20-2381-W1	134	-53	1274	453620	5435791	402	4125
OSK-W-20-2384	127	-52	1164	453397	5435557	413	3825
OSK-W-20-2385	125	-54	873	453687	5435679	401	4150
OSK-W-20-2385-W1	125	-54	937	453687	5435679	401	4150
OSK-W-20-2394	138	-52	864	452922	5435468	415	3375
OSK-W-20-2394-W1	138	-52	645	452922	5435468	415	3375
OSK-W-20-2397	131	-58	1197	453451	5435594	412	3900
WST-20-0492	158	-7	142	453256	5435209	97	3525
WST-20-0524	182	-44	243	453104	5435064	231	3325
WST-20-0548A	166	-59	370	453227	5435126	134	3475
WST-20-0553	148	-28	224	453257	5435209	96	3525
WST-20-0570	159	-50	454	453104	5435065	231	3325
WST-20-0571	167	-55	465	453104	5435065	231	3325
WST-20-0572A	136	-51	463	452955	5435004	252	3175
WST-20-0577A	117	-55	196	453316	5435167	124	3575
WST-20-0582	176	-56	144	453177	5435125	173	3425
WST-20-0583	176	-50	129	453177	5435125	173	3425
WST-20-0592	137	-26	205	453257	5435209	96	3525
WST-20-0593	149	-16	202	453257	5435209	96	3525
WST-20-0611	118	-63	378	453358	5435273	16	3650
WST-20-0628	150	-31	164	453321	5435235	55	3600

Lynx Zone

Mineralization occurs as grey to translucent quartz-carbonate-pyrite-tourmaline veins and pyrite replacement zones and stockworks. The vein-type is associated with haloes of pervasive sericite-pyrite ± silica alteration and contain sulphides (predominantly pyrite with minor amounts of chalcopyrite, sphalerite, galena, arsenopyrite, and pyrrhotite) and local visible gold. Replacement mineralization is associated with strong pervasive silica-sericite-ankerite ± tourmaline alteration and contains disseminated pyrite from trace to 80% with local visible gold. Pyrite stockworks can form envelopes that reach several tens of metres thick. Fuchsite alteration is common and is spatially constrained to near the gabbros. Mineralization occurs at or near geological contacts between felsic porphyritic or fragmental intrusions and the host rhyolites or gabbros and locally can be hosted along the gabbro-rhyolite contact.

Qualified Person

Quality Control and Reporting Protocols

About the Windfall Gold Deposit

The Windfall 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 news release dated February 17, 2021 and assuming a cut-off grade of 3.50 g/t Au, comprises 521,000 tonnes at 11.3 g/t Au (189,000 ounces) in the measured mineral resource category, 5,502,000 tonnes at 9.4 g/t Au (1,668,000 ounces) in the indicated mineral resource category and 16,401,000 tonnes at 8.0 g/t Au (4,244,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the February 17, 2021 news release, certain of which are described in the February 17, 2021 news release, will be further described in the full technical report being prepared for this updated mineral resource estimate in accordance with NI 43-101, and will be available on SEDAR (www.sedar.com) under the Corporation’s issuer profile within 45 days from February 17, 2021. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal zones: Lynx, Main Zone, and Underdog. Mineralization is generally comprised of sub-vertical zones following intrusive porphyry contacts plunging to the northeast. The resources are defined from surface to a depth of 1,600 metres as it now includes the Triple 8 (T8) zone. The resources excluding T8 are defined from surface to a depth of 1,200 metres. The deposit remains open along strike and at depth. Mineralization has been identified at surface in some areas and as deep as 2,625 metres in others with significant potential to extend mineralization down-plunge and at depth.

About Osisko Mining Inc.

Cautionary Note Regarding Forward-Looking Information

CONTACT INFORMATION:

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

EXPANSION DRILLING ADDS NEW HIGH-GRADE FOR OSISKO

Posted on February 23, 2021November 8, 2023 by Yannick Fradette

EXPANSION DRILLING ADDS NEW HIGH-GRADE FOR OSISKO

141 g/t Au Over 3.5 Metres in Lynx

29.2 g/t Au over 2.1 Metres in Caribou

31.4 g/t Au Over 2.4 Metres in F51

(Toronto, February 23, 2021) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Approximately 200,000 metres remain in the drill program, focused on the Lynx portion of the deposit. Osisko expects to complete resource drilling by the fall of 2021.

Osisko Chief Executive Officer John Burzynski commented: “Today’s expansion drill results are a strong confirmation that many of the zones across the deposit remain open to growth. The results presented below fall outside the wireframes in the recently published mineral resource estimate (“MRE”), and OSK-W-20-2391 in particular extends Triple Lynx 150 metres from the closest MRE block.”

Significant new analytical results presented below include 145 intercepts in 56 drill holes (31 from surface, 25 from underground) and 33 wedges.

Selected intercepts include: 141 g/t Au over 3.5 metres in WST-20-0524; 74.9 g/t Au over 2.3 metres in WST-20-0547; 57.8 g/t Au over 2.3 metres in OSK-W-20-2275-W4; 13.3 g/t Au over 6.4 metres in WST-20-0478; 26.0 g/t Au over 3.2 metres in OSK-W-20-2354-W1; 31.4 g/t Au over 2.4 metres in OSK-W-20-2391; 25.9 g/t Au over 2.9 metres in WST-20-0570; 15.9 g/t Au over 4.7 metres in WST-20-0346; 16.9 g/t Au over 4.2 metres in OSK-W-20-2354; and 24.4 g/t Au 2.9 metres in OSK-W-20-2369. Maps showing hole locations and full analytical results are available at www.osiskomining.com

Expansion Drilling

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Zone	Corridor
OSK-W-20-852-W2	792.2	794.5	2.3	4.68		Caribou_2219	Caribou
including	793.2	793.5	0.3	32.7		Caribou_2219	Caribou
OSK-W-20-852-W3	640.4	646.8	6.4	10.6		Caribou	Caribou
including	640.4	640.7	0.3	43.4		Caribou	Caribou
	681.0	683.0	2.0	4.20		Caribou_2255	Caribou
OSK-W-20-852-W4	814.0	816.0	2.0	13.9		Caribou	Caribou
including	814.0	815.0	1.0	21.8		Caribou	Caribou
OSK-W-20-913-W2	622.0	624.0	2.0	4.60		Caribou	Caribou
including	622.5	622.8	0.3	28.8		Caribou	Caribou
	672.0	674.5	2.5	4.00		Caribou	Caribou
including	673.0	673.5	0.5	16.8		Caribou	Caribou
	755.0	757.0	2.0	16.7		Caribou	Caribou
including	755.4	756.0	0.6	53.9		Caribou	Caribou
	858.0	860.0	2.0	3.48		Caribou	Caribou
OSK-W-20-2170-W7	1102.0	1104.0	2.0	5.61		TLX_3170	Triple Lynx
including	1102.5	1102.9	0.4	23.5		TLX_3170	Triple Lynx
OSK-W-20-2252-W8	1190.0	1192.0	2.0	7.24		Triple Lynx	Triple Lynx
including	1190.0	1190.3	0.3	24.7		Triple Lynx	Triple Lynx
OSK-W-20-2252-W10	989.0	991.0	2.0	12.2		TLX_3163	Triple Lynx
	993.0	999.6	6.6	9.83		TLX_3163	Triple Lynx
including	998.9	999.3	0.4	71.3		TLX_3163	Triple Lynx
OSK-W-20-2256-W8	987.0	989.0	2.0	4.19		TLX_3164	Triple Lynx
OSK-W-20-2271-W4	792.0	794.0	2.0	29.4		Lynx	Lynx
including	792.0	793.0	1.0	55.0		Lynx	Lynx
	804.0	807.0	3.0	8.32		Lynx	Lynx
including	804.0	804.6	0.6	21.9		Lynx	Lynx
OSK-W-20-2275-W4	920.7	923.0	2.3	57.8	17.6	Triple Lynx	Triple Lynx
including	921.2	921.5	0.3	408	100	Triple Lynx	Triple Lynx
OSK-W-20-2280-W6	937.5	939.5	2.0	4.75		Triple Lynx	Triple Lynx
including	937.5	937.8	0.3	16.1		Triple Lynx	Triple Lynx
	1078.9	1081.0	2.1	11.3		TLX_3170	Triple Lynx
OSK-W-20-2280-W8	960.9	964.0	3.1	5.07		TLX_3163	Triple Lynx
OSK-W-20-2280-W9	1071.0	1075.0	4.0	4.82		TLX_3162	Triple Lynx
including	1074.0	1075.0	1.0	12.7		TLX_3162	Triple Lynx
OSK-W-20-2283-W3	939.0	941.3	2.3	4.50		TLX_3194	Triple Lynx
including	940.2	940.6	0.4	25.0		TLX_3194	Triple Lynx
OSK-W-20-2283-W4	983.0	985.0	2.0	4.46		TLX_3195	Triple Lynx
OSK-W-20-2287	1284.0	1286.0	2.0	8.11		LX4_3445	Lynx
including	1284.3	1284.8	0.5	32.0		LX4_3445	Lynx
OSK-W-20-2295-W2	919.6	921.6	2.0	3.76		Triple Lynx	Triple Lynx
including	919.6	920.0	0.4	18.4		Triple Lynx	Triple Lynx
OSK-W-20-2300	9.2	13.0	3.8	7.10		F17	F17
	24.0	26.0	2.0	9.95		F17	F17
	39.0	44.3	5.3	9.59		F17	F17
OSK-W-20-2313-W4	1119.3	1121.9	2.6	4.08		Triple Lynx	Triple Lynx
including	1120.2	1121.0	0.8	12.5		Triple Lynx	Triple Lynx
OSK-W-20-2313-W5	911.9	914.0	2.1	21.2	17.5	Triple Lynx	Triple Lynx
including	911.9	912.2	0.3	126	100	Triple Lynx	Triple Lynx
OSK-W-20-2313-W6	929.0	931.0	2.0	5.42		Triple Lynx	Triple Lynx
including	929.8	930.2	0.4	12.5		Triple Lynx	Triple Lynx
	1003.2	1005.3	2.1	5.89		TLX_3195	Triple Lynx
including	1003.2	1003.7	0.5	18.5		TLX_3195	Triple Lynx
OSK-W-20-2313-W7	868.7	872.6	3.9	6.43		TLX_3161	Triple Lynx
OSK-W-20-2319	290.0	292.5	2.5	5.93		Bobcat	Bobcat
	672.0	674.0	2.0	5.13		Lynx SW	Lynx
including	672.0	672.9	0.9	11.4		Lynx SW	Lynx
OSK-W-20-2322-W3	812.0	814.4	2.4	24.4		Lynx	Lynx
including	812.5	813.0	0.5	59.6		Lynx	Lynx
	857.0	859.0	2.0	6.67		Lynx	Lynx
including	857.7	858.5	0.8	14.5		Lynx	Lynx
OSK-W-20-2328	287.0	289.5	2.5	4.92		Caribou	Caribou
including	289.1	289.5	0.4	24.4		Caribou	Caribou
	351.6	353.6	2.0	3.95		Caribou	Caribou
OSK-W-20-2331	51.0	53.0	2.0	4.86		Mallard_5216	Mallard
OSK-W-20-2338	37.0	39.0	2.0	5.12		F17	F17
OSK-W-20-2340	75.0	77.0	2.0	6.51		F17	F17
including	76.1	76.7	0.6	21.4		F17	F17
OSK-W-20-2346	590.0	592.0	2.0	6.20		LXM_3323	Lynx
	809.0	811.0	2.0	3.79		Triple Lynx	Triple Lynx
OSK-W-20-2354	501.0	503.3	2.3	5.33		Caribou_2116	Caribou
including	501.0	502.0	1.0	12.0		Caribou_2116	Caribou
	620.0	622.0	2.0	24.7		Caribou	Caribou
including	620.0	620.4	0.4	76.5		Caribou	Caribou
	695.5	697.5	2.0	7.53		Caribou_2217	Caribou
including	696.7	697.1	0.4	29.2		Caribou_2217	Caribou
	728.7	730.7	2.0	19.5		Caribou_2218	Caribou
including	729.4	729.8	0.4	77.0		Caribou_2218	Caribou
	735.3	739.5	4.2	16.9	15.1	Caribou_2218	Caribou
including	739.2	739.5	0.3	125	100	Caribou_2218	Caribou
OSK-W-20-2354-W1	702.0	704.0	2.0	4.80		Caribou	Caribou
including	703.0	704.0	1.0	9.26		Caribou	Caribou
	722.2	725.4	3.2	26.0		Caribou	Caribou
including	723.4	724.0	0.6	55.3		Caribou	Caribou
	757.2	759.9	2.7	13.5		Caribou	Caribou
including	757.2	757.5	0.3	74.8		Caribou	Caribou
OSK-W-20-2354-W2	545.0	547.5	2.5	7.42		Caribou	Caribou
including	546.2	546.5	0.3	47.3		Caribou	Caribou
OSK-W-20-2354-W3	541.3	544.0	2.7	3.99		Caribou	Caribou
OSK-W-20-2354-W4	730.4	733.0	2.6	4.65		Caribou	Caribou
OSK-W-20-2362	58.0	60.0	2.0	31.7	25.6	Bobcat_2355	Bobcat
including	58.5	59.0	0.5	125	100	Bobcat_2355	Bobcat
OSK-W-20-2363	970.6	972.6	2.0	3.88		Triple Lynx	Triple Lynx
OSK-W-20-2363-W2	666.4	669.7	3.3	6.59		TLX_3196	Triple Lynx
including	669.4	669.7	0.3	31.8		TLX_3196	Triple Lynx
OSK-W-20-2365	44.0	46.5	2.5	8.36		Bobcat	Bobcat
OSK-W-20-2369	584.9	587.8	2.9	24.4		Lynx	Lynx
including	586.7	587.8	1.1	35.6		Lynx	Lynx
	640.0	642.0	2.0	29.2	26.4	LXM_3304	Lynx
including	640.4	640.9	0.5	111	100	LXM_3304	Lynx
	654.1	656.3	2.2	7.16		LXM_3341	Lynx
including	654.1	654.4	0.3	36.2		LXM_3341	Lynx
	660.0	662.0	2.0	6.06		LXM_3341	Lynx
OSK-W-20-2371	796.5	798.8	2.3	17.2	13.2	Triple Lynx	Triple Lynx
including	796.5	796.8	0.3	131	100	Triple Lynx	Triple Lynx
	1049.0	1051.0	2.0	7.30		Lynx	Lynx
OSK-W-20-2371-W1	847.0	849.0	2.0	7.72		Triple Lynx	Triple Lynx
OSK-W-20-2371-W2	1023.0	1025.2	2.2	4.93		Triple Lynx	Triple Lynx
OSK-W-20-2375-W1	907.3	909.7	2.4	18.5		LX4_3437	Lynx
including	908.4	909.3	0.9	36.8		LX4_3437	Lynx
OSK-W-20-2376	131.6	133.8	2.2	4.01		Caribou	Caribou
	233.0	235.0	2.0	4.27		Caribou	Caribou
including	233.0	233.3	0.3	27.6		Caribou	Caribou
OSK-W-20-2377-W1	876.5	878.6	2.1	28.9	24.0	Caribou extension	Caribou
including	876.5	877.0	0.5	121	100	Caribou extension	Caribou
	882.8	884.8	2.0	16.4		Caribou extension	Caribou
including	882.8	883.8	1.0	32.7		Caribou extension	Caribou
OSK-W-20-2381	1116.4	1118.7	2.3	4.02		Lynx 4	Lynx
OSK-W-20-2384	547.0	549.0	2.0	9.31		Lynx	Lynx
including	548.0	549.0	1.0	18.2		Lynx	Lynx
OSK-W-20-2387-W1	496.0	498.1	2.1	4.17		Caribou	Caribou
including	496.0	496.4	0.4	12.2		Caribou	Caribou
OSK-W-20-2388	317.6	319.7	2.1	10.7		Caribou	Caribou
including	317.6	318.6	1.0	22.4		Caribou	Caribou
	568.7	571.1	2.4	4.85		Caribou_2250	Caribou
including	570.0	570.5	0.5	18.4		Caribou_2250	Caribou
	663.0	665.0	2.0	11.6		Caribou_2219	Caribou
including	663.0	664.0	1.0	23.0		Caribou_2219	Caribou
	666.0	668.1	2.1	4.12		Caribou_2219	Caribou
including	667.5	668.1	0.6	13.7		Caribou_2219	Caribou
OSK-W-20-2390	579.0	581.2	2.2	27.9		Caribou_2247	Caribou
including	580.2	580.7	0.5	93.3		Caribou_2247	Caribou
OSK-W-20-2391	234.6	237.0	2.4	31.4	21.3	F51	F51
including	235.4	235.9	0.5	149	100	F51	F51
	1372.5	1376.0	3.5	8.73		Triple Lynx	Triple Lynx
including	1373.3	1373.7	0.4	36.0		Triple Lynx	Triple Lynx
	1497.0	1503.0	6.0	8.84		Triple Lynx	Triple Lynx
	1526.0	1528.0	2.0	15.7		Triple Lynx	Triple Lynx
OSK-W-20-2397	603.0	605.1	2.1	9.70		Lynx	Lynx
including	603.3	604.0	0.7	27.3		Lynx	Lynx
	612.0	614.0	2.0	7.36		Lynx	Lynx
	654.0	656.5	2.5	4.16		LXM_3304	Lynx
including	655.0	655.4	0.4	12.5		LXM_3304	Lynx
	698.5	700.5	2.0	4.07		LXM_3304	Lynx
including	700.0	700.5	0.5	11.9		LXM_3304	Lynx
	975.0	977.1	2.1	7.12		Lynx 4	Lynx
	1031.0	1033.0	2.0	11.0		Lynx 4	Lynx
including	1032.7	1033.0	0.3	69.9		Lynx 4	Lynx
	1039.0	1041.0	2.0	4.76		Lynx 4	Lynx
including	1039.6	1040.3	0.7	12.9		Lynx 4	Lynx
	1058.0	1060.2	2.2	26.1	19.6	LX4_3430	Lynx
including	1058.8	1059.2	0.4	136	100	LX4_3430	Lynx
OSK-W-20-2399-W1	551.0	554.3	3.3	19.2		Caribou_2523	Caribou
including	553.5	554.3	0.8	69.0		Caribou_2523	Caribou
OSK-W-20-2400	815.0	817.0	2.0	9.57		Caribou	Caribou
including	815.4	816.0	0.6	31.5		Caribou	Caribou
OSK-W-20-2405	519.6	521.8	2.2	4.59		Caribou	Caribou
OSK-W-20-2405-W1	518.0	520.0	2.0	8.09		Caribou	Caribou
	620.0	622.0	2.0	6.44		Caribou	Caribou
including	620.5	621.0	0.5	22.8		Caribou	Caribou
	669.0	672.0	3.0	8.57		Caribou	Caribou
OSK-W-20-2406	635.0	638.7	3.7	10.1		Caribou_2241	Caribou
including	636.0	637.0	1.0	21.8		Caribou_2241	Caribou
	642.0	649.3	7.3	6.34		Caribou_2241	Caribou
including	647.7	648.3	0.6	17.9
and	648.7	649.3	0.6	21.0
OSK-W-20-2415	639.8	643.5	3.7	7.66		Caribou_2233	Caribou
including	639.8	640.1	0.3	27.9
and	640.4	640.7	0.3	33.2
	680.0	682.3	2.3	8.40		Caribou_2217	Caribou
including	681.4	682.3	0.9	19.4		Caribou_2217	Caribou
OSK-W-20-2421	685.0	687.2	2.2	6.02		Caribou	Caribou
OSK-W-20-2425	298.0	301.0	3.0	18.9		Caribou	Caribou
including	299.0	300.0	1.0	40.4		Caribou	Caribou
OSK-W-20-2432	725.0	727.4	2.4	9.40		Caribou	Caribou
including	726.1	726.4	0.3	32.4		Caribou	Caribou
	794.6	799.6	5.0	6.98		Caribou	Caribou
including	794.6	795.5	0.9	20.4		Caribou	Caribou
	804.3	806.6	2.3	7.92		Caribou	Caribou
including	804.3	805.1	0.8	20.0		Caribou	Caribou
OSK-W-20-2440	719.0	721.0	2.0	6.26		Caribou	Caribou
including	719.0	719.8	0.8	15.6		Caribou	Caribou
OSK-W-21-2451	430.8	434.0	3.2	20.4		Caribou	Caribou
including	431.2	431.6	0.4	94.7		Caribou	Caribou
	516.8	519.0	2.2	8.78		Caribou	Caribou
including	517.1	517.7	0.6	30.1		Caribou	Caribou
OSK-W-21-2455	479.9	482.2	2.3	21.0	15.0	Caribou_2116	Caribou
including	479.9	480.2	0.3	146	100	Caribou_2116	Caribou
WST-20-0346	118.2	120.4	2.2	16.1		Caribou_2151	Caribou
including	118.2	118.7	0.5	69.8		Caribou_2151	Caribou
	348.0	352.7	4.7	15.9		Caribou corridor	Caribou
WST-20-0476	260.9	263.1	2.2	5.92		Caribou corridor	Caribou
	374.8	376.8	2.0	12.7		Caribou corridor	Caribou
including	376.3	376.8	0.5	45.8		Caribou corridor	Caribou
WST-20-0477	52.4	55.0	2.6	9.78		Mallard	Mallard
	228.0	230.4	2.4	4.55		Caribou_2100	Caribou
WST-20-0478	167.6	174.0	6.4	13.3	12.8	Caribou_2151	Caribou
including	172.4	173.0	0.6	106	100	Caribou_2151	Caribou
	354.0	356.0	2.0	4.72		Caribou	Caribou
including	354.0	354.5	0.5	18.4		Caribou	Caribou
WST-20-0479B	147.1	149.1	2.0	7.97		Z27_1115	Zone 27
	157.5	159.8	2.3	5.66		Z27	Zone 27
WST-20-0480B	376.0	378.0	2.0	9.80		Caribou	Caribou
WST-20-0496	302.0	304.2	2.2	4.24		Lynx SW	Lynx SW
including	303.4	303.7	0.3	30.7		Lynx SW	Lynx SW
	513.6	516.2	2.6	10.9		Lynx SW	Lynx SW
including	513.6	513.9	0.3	81.3		Lynx SW	Lynx SW
WST-20-0521	367.0	369.1	2.1	12.1		Caribou	Caribou
including	367.6	368.6	1.0	24.4		Caribou	Caribou
WST-20-0522	374.0	376.0	2.0	6.98		Lynx SW	Lynx SW
including	374.8	375.5	0.7	19.7		Lynx SW	Lynx SW
WST-20-0524	225.8	229.3	3.5	141	28.6	Lynx SW	Lynx SW
including	228.4	229.3	0.9	536	100	Lynx SW	Lynx SW
WST-20-0534	122.0	124.2	2.2	10.4		LXM_3359	Lynx
including	123.2	124.2	1.0	22.9		LXM_3359	Lynx
WST-20-0547	421.6	423.9	2.3	74.9	43.4	LXSW_3502	Lynx
including	423.0	423.9	0.9	181	100	LXSW_3502	Lynx
WST-20-0552	127.0	129.0	2.0	11.1		LXM_3339	Lynx
including	127.6	128.3	0.7	29.9		LXM_3339	Lynx
	235.7	238.0	2.3	22.7		LXSW_3506	Lynx
including	236.4	237.4	1.0	51.8		LXSW_3506	Lynx
WST-20-0556	96.3	98.4	2.1	4.66		Bobcat	Bobcat
including	97.8	98.4	0.6	13.5		Bobcat	Bobcat
WST-20-0566A	13.7	17.2	3.5	17.7		Mallard_5211	Mallard
including	14.6	15.3	0.7	38.3		Mallard_5211	Mallard
WST-20-0567	58.0	60.0	2.0	4.55		Z27	Zone 27
including	58.0	59.0	1.0	9.01		Z27	Zone 27
	296.0	298.0	2.0	5.01		Caribou corridor	Caribou
WST-20-0569	259.9	262.0	2.1	14.6		LXSW_3507	Lynx SW
including	261.5	262.0	0.5	26.7		LXSW_3507	Lynx SW
WST-20-0570	206.2	209.1	2.9	25.9		Lynx SW	Lynx SW
including	207.8	208.4	0.6	55.0		Lynx SW	Lynx SW
WST-20-0572A	272.0	274.0	2.0	11.0		LXSW_3556	Lynx SW
WST-20-0574	283.6	285.9	2.3	13.7		Lynx SW	Lynx SW
WST-20-0578	170.0	172.0	2.0	24.3		LXM_3304	Lynx
including	170.8	171.2	0.4	76.8		LXM_3304	Lynx
	785.0	792.0	7.0	9.09		LX4_3412	Lynx
including	789.5	790.4	0.9	24.2		LX4_3412	Lynx
WST-20-0581	408.9	411.0	2.1	14.8		LXSW_3556	Lynx
including	408.9	409.8	0.9	34.4		LXSW_3556	Lynx
WST-20-0589	351.0	353.1	2.1	29.2		Caribou	Caribou
including	351.7	352.6	0.9	67.7		Caribou	Caribou
WST-20-0584	122.0	124.0	2.0	11.4		LXM_3301	Lynx
WST-20-0626	134.4	136.8	2.4	4.19		LXM_3307	Lynx
including	134.4	135.0	0.6	9.74		LXM_3307	Lynx
	138.3	140.5	2.2	19.4		LXM_3307	Lynx
including	138.8	139.8	1.0	41.4		LXM_3307	Lynx

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below. SW = Southwest.

Drill hole location

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-20-852-W2	330	-55	873	452874	5434552	398	2875
OSK-W-20-852-W3	330	-55	849	452874	5434552	398	2875
OSK-W-20-852-W4	330	-55	873	452874	5434552	398	2875
OSK-W-20-913-W2	334	-52	913	452878	5434419	401	2825
OSK-W-20-2170-W7	128	-59	1205	453425	5435657	413	3900
OSK-W-20-2252-W8	129	-54	1239	453241	5435694	415	3750
OSK-W-20-2252-W10	129	-54	824	453241	5435694	415	3750
OSK-W-20-2256-W8	125	-51	1056	453160	5435686	411	3675
OSK-W-20-2271-W4	120	-53	1134	453462	5435683	410	3950
OSK-W-20-2275-W4	127	-49	1052	452888	5435583	409	3400
OSK-W-20-2280-W6	127	-58	1152	453304	5435639	415	3775
OSK-W-20-2280-W8	127	-58	1134	453304	5435639	415	3775
OSK-W-20-2280-W9	127	-58	1037	453304	5435639	415	3775
OSK-W-20-2283-W3	135	-50	1004	452997	5435607	425	3500
OSK-W-20-2283-W4	135	-50	1012	452997	5435607	425	3500
OSK-W-20-2287	116	-53	1406	453607	5435714	404	4075
OSK-W-20-2295-W2	132	-51	963	452933	5435473	415	3375
OSK-W-20-2300	152	-45	192	452699	5435578	406	3225
OSK-W-20-2313-W4	134	-52	1134	452965	5435583	420	3450
OSK-W-20-2313-W5	134	-52	1086	452965	5435583	420	3450
OSK-W-20-2313-W6	134	-52	1029	452965	5435583	420	3450
OSK-W-20-2313-W7	134	-52	1086	452965	5435583	420	3450
OSK-W-20-2319	141	-50	768	452872	5435153	409	3175
OSK-W-20-2322-W3	130	-54	1274	453608	5435715	403	4075
OSK-W-20-2328	136	-56	942	452872	5435153	409	3175
OSK-W-20-2331	335	-50	239	451987	5434764	406	2200
OSK-W-20-2338	155	-57	213	452679	5435584	405	3200
OSK-W-20-2340	146	-55	201	452650	5435568	405	3175
OSK-W-20-2346	130	-53	1161	453397	5435557	413	3825
OSK-W-20-2354	336	-60	759	452739	5434474	401	2725
OSK-W-20-2354-W1	336	-60	792	452739	5434474	401	2725
OSK-W-20-2354-W2	336	-60	750	452739	5434474	401	2725
OSK-W-20-2354-W3	336	-60	750	452739	5434474	401	2725
OSK-W-20-2354-W4	336	-60	783	452739	5434474	401	2725
OSK-W-20-2362	350	-45	256	452719	5434777	398	2850
OSK-W-20-2363	139	-52	1031	452930	5435548	419	3425
OSK-W-20-2363-W2	139	-52	695	452930	5435548	419	3425
OSK-W-20-2365	354	-46	312	452673	5434766	398	2800
OSK-W-20-2369	130	-56	909	453426	5435565	410	3850
OSK-W-20-2371	123	-53	1203	452996	5435364	412	3375
OSK-W-20-2371-W1	123	-53	1032	452996	5435364	412	3375
OSK-W-20-2371-W2	123	-53	945	452996	5435364	412	3375
OSK-W-20-2375-W1	122	-56	987	453810	5435779	400	4300
OSK-W-20-2376	325	-55	510	452689	5434635	398	2750
OSK-W-20-2377-W1	132	-49	1097	452702	5435548	409	3225
OSK-W-20-2381	134	-53	1230	453620	5435791	402	4125
OSK-W-20-2384	127	-52	1164	453397	5435557	413	3825
OSK-W-20-2387-W1	336	-59	738	452694	5434440	401	2675
OSK-W-20-2388	326	-61	363	452715	5434606	397	2775
OSK-W-20-2390	330	-65	647	452597	5434393	401	2550
OSK-W-20-2391	117	-57	1230	453281	5435894	408	3900
OSK-W-20-2397	131	-58	1197	453451	5435594	412	3900
OSK-W-20-2399-W1	333	-54	425	452874	5434552	398	2875
OSK-W-20-2400	336	-53	884	452876	5434419	402	2825
OSK-W-20-2405	332	-58	723	452694	5434440	401	2675
OSK-W-20-2405-W1	332	-58	716	452694	5434440	401	2675
OSK-W-20-2406	333	-56	623	452632	5434280	400	2525
OSK-W-20-2415	328	-54	143	452738	5434474	401	2725
OSK-W-20-2421	332	-59	699	452632	5434280	400	2525
OSK-W-20-2425	336	-60	747	452715	5434606	397	2775
OSK-W-20-2432	333	-57	864	452809	5434415	404	2750
OSK-W-20-2440	330	-52	807	452739	5434474	401	2725
OSK-W-21-2451	330	-58	803	452809	5434415	404	2750
OSK-W-21-2455	328	-53	780	452738	5434474	401	2725
WST-20-0346	136	-18	391	452282	5434975	264	2575
WST-20-0476	132	-33	403	452282	5434975	263	2575
WST-20-0477	131	-30	394	452282	5434976	263	2575
WST-20-0478	123	-31	391	452282	5434976	263	2575
WST-20-0479B	138	-59	393	452281	5434975	262	2575
WST-20-0480B	142	-52	382	452281	5434975	262	2575
WST-20-0496	173	-60	537	453227	5435125	134	3475
WST-20-0521	151	-58	385	452281	5434975	262	2575
WST-20-0522	177	-52	457	453104	5435064	231	3325
WST-20-0524	182	-44	243	453104	5435064	231	3325
WST-20-0534	143	-32	135	453315	5435165	124	3575
WST-20-0547	167	-53	487	453227	5435125	134	3475
WST-20-0552	165	-39	517	453257	5435209	97	3525
WST-20-0556	155	-26	163	452955	5435003	254	3175
WST-20-0566A	133	-16	368	452208	5434898	248	2475
WST-20-0567	139	-19	379	452208	5434898	248	2475
WST-20-0569	165	-59	526	453104	5435065	231	3325
WST-20-0570	159	-50	454	453104	5435065	231	3325
WST-20-0572A	136	-51	463	452955	5435004	252	3175
WST-20-0574	139	-62	370	452955	5435004	252	3175
WST-20-0578	151	-46	802	453418	5435306	68	3725
WST-20-0581	181	-60	474	453177	5435126	173	3425
WST-20-0589	147	-55	376	452281	5434975	263	2575
WST-20-0584	174	-19	205	453417	5435304	69	3725
WST-20-0626	194	-59	471	453176	5435125	173	3425

Lynx Zone

Caribou Zone

F-Zone

Bobcat

Mallard

Qualified Person

Quality Control and Reporting Protocols

About the Windfall Gold Deposit

The Windfall 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 news release dated February 17, 2021 and assuming a cut-off grade of 3.50 g/t Au, comprises 521,000 tonnes at 11.3 g/t Au (189,000 ounces) in the measured mineral resource category, 5,502,000 tonnes at 9.4 g/t Au (1,668,000 ounces) in the indicated mineral resource category and 16,401,000 tonnes at 8.0 g/t Au (4,244,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the February 17, 2021 news release, certain of which are described in the February 17, 2021 news release, will be further described in the full technical report being prepared for this updated mineral resource estimate in accordance with NI 43-101, and will be available on SEDAR (www.sedar.com) under the Corporation’s issuer profile within 45 days from February 17, 2021. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal zones: Lynx, Main Zone, and Underdog. Mineralization is generally comprised of sub-vertical zones following intrusive porphyry contacts plunging to the northeast. The resources are defined from surface to a depth of 1,600 metres as it now includes the Triple 8 (T8) zone. The resources excluding T8 are defined from surface to a depth of 1,200 metres. The deposit remains open along strike and at depth. Mineralization has been identified at surface in some areas and as deep as 2,625 metres in others with significant potential to extend mineralization down-plunge and at depth.

About Osisko Mining Inc.

Cautionary Note Regarding Forward-Looking Information

CONTACT INFORMATION:

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

OSISKO MINING UPDATES WINDFALL MINERAL RESOURCE ESTIMATE

Posted on February 17, 2021November 8, 2023 by Yannick Fradette

1.86M oz Au M&I Resource Averaging 9.6 g/t Au

4.24M oz Au Inferred Resource Averaging 8.0 g/t Au

(Toronto, February 17, 2021) Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to provide an updated mineral resource estimate (the “MRE”) for its 100% owned world-class Windfall gold deposit, located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

This MRE is based on drilling completed as of September 2020, and includes analytical results received as of November 30, 2020. Approximately 100,000 metres of drilling has been completed since the above dates, with a further 200,000 metres in progress and expected to be completed by the third quarter of 2021. A subsequent MRE for the Windfall feasibility study will follow the completion of the infill program.

HIGHLIGHTS

M&I grade of 9.6 g/t Au continues trend of grade increase with infill program
M&I ounces increased 54%
Lynx represents over 60% of the total MRE ounces with average grades of 11.3 g/t Au Measured; 11.0 g/t Au Indicated; and 9.9 g/t Au Inferred
Significant Lynx high-grade zones remain open to expansion down plunge
Remainder of infill drilling is focused on Lynx with >30 drills
Discovery and definition cost averages US$38/oz[1]
Deposit average of 4.5 oz Au defined per metre drilled

John Burzynski, Chief Executive Officer of Osisko Mining, commented: “We are pleased to deliver this updated MRE, as Windfall continues to impress with increasing average grade and scale. The infill drill program is exceeding our expectations, with the M&I resource average grade increasing to 9.6 g/t Au. We anticipate that by the end of the infill program and in the subsequent MRE, we will see another significant addition to the M&I resource with increased grade, and further growth of the deposit scale. We have had strong infill results since the cut-off date that have not been included in this current estimate, and ongoing drilling continues to be encouraging as we work steadily towards the completion of our drill program.”

Mr. Burzynski continued: “The past year has provided some unforeseen challenges, and despite this, we have managed to advance our work significantly. We would like very much to thank our Cree First Nation hosts and partners, local and provincial governments, our employees and contractors, our stakeholders and our shareholders for their help and strong support.”

Table 1: Windfall Gold Deposit Mineral Resource Estimate Sensitivity Table

Cut-off Grade (g/t Au)	Measured + Indicated					Inferred
Cut-off Grade (g/t Au)	Tonnes (000 t)	Grade Au (g/t)	Grade Ag (g/t)	Ounces Au (000 oz)	Ounces Ag (000 oz)	Tonnes (000 t)	Grade Au (g/t)	Grade Ag (g/t)	Ounces Au (000 oz)	Ounces Ag (000 oz)
5.00	4,214	11.9	6.8	1,614	918	10,525	10.2	3.3	3,454	1,133
4.50	4,721	11.1	6.5	1,692	981	12,090	9.5	3.1	3,693	1,215
4.00	5,304	10.4	6.2	1,771	1,059	14,045	8.8	2.9	3,960	1,319
3.50	6,023	9.6	5.9	1,857	1,149	16,401	8.0	2.7	4,244	1,446
3.00	6,882	8.8	5.7	1,947	1,257	19,561	7.3	2.6	4,574	1,604
2.50	7,971	8.0	5.4	2,043	1,381	23,676	6.5	2.4	4,937	1,806

Note: The MRE uses a cut-off grade of 3.5 g/t Au.

Table 2: Windfall Gold Deposit Mineral Resource Estimate by Area (3.5 g/t Au cut-off)

Area

Measured

Indicated

Inferred

Tonnes¹(000 t)

Grade Au

(g/t)

Grade Ag

(g/t)

Ounces Au¹

(000 oz)

Ounces Ag¹

(000 oz)

Tonnes¹(000 t)

Grade Au

(g/t)

Grade Ag

(g/t)

Ounces Au¹

(000 oz)

Ounces Ag¹

(000 oz)

Tonnes¹(000 t)

Grade Au

(g/t)

Grade Ag

(g/t)

Ounces Au¹

(000 oz)

Ounces Ag¹

(000 oz)

Lynx²

521

11.3

8.1

189

135

3 075

11.0

6.6

1 088

655

7 418

9.9

3.5

2 355

833

Underdog

–

562

8.0

1.1

145

4 788

6.9

0.9

1 068

139

Main³

–

1 865

7.3

5.7

436

339

3 540

5.9

3.3

673

375

Triple 8

–

655

7.1

4.7

149

Total

521

11.3

8.1

189

135

5 502

9.4

5.7

1 668

1 013

16 401

8.0

2.7

4 244

1 446

Notes:¹ Values are rounded to nearest thousand which may cause apparent discrepancies.

²Lynx area includes: Lynx Main, Lynx HW, Lynx SW and Lynx 4, Triple Lynx.

³ Main area includes: Zone 27, Caribou, Mallard, Windfall Nord, and F-Zones.

See Windfall Gold Deposit Mineral Resource Estimate notes further below.

“Located in Québec, one of the worlds best mining jurisdictions, this MRE places Windfall among the best high-grade development projects globally.” added Mr. Burzynski. “Apart from the infill program, additional drills are exploring down plunge extensions of Lynx, the nearby Fox trend, and targets along strike from the Windfall deposit. The Windfall exploration ramp is advancing towards the third bulk sample in Triple Lynx, and we have received authorization to conduct test stopes in Lynx to optimize future mining parameters and grade distribution.”

This MRE is the result of 3,612 drill holes (1,343,593 metres of core) in the resource area, including 2,959 drill holes (1,161,872 metres of core) completed by Osisko from October 2015 to September 2020 with assays up to November 30, 2020. The Windfall MRE (with an effective date of November 30, 2020) was prepared by Osisko and reviewed and audited by BBA Inc., Montréal, Québec. The full technical report, which is being prepared in accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI-43-101”), will be available on SEDAR (www.sedar.com) under the Corporation’s issuer profile within 45 days.

This mineral resource estimate reflects the current status of the geological interpretation supported by infill drilling, underground mapping and bulk sample results. Most mineralized envelopes in the Main area are associated with pyritic stringers occurring near contacts between volcanic rocks and younger intrusive rocks. The Lynx mineralized zones form an extensive anastomosed network of quartz-rich and pyrite-rich veins hosted within strongly silicified volcanic rocks. This system is located on the southern limb of an open fold plunging at 40 degrees towards ENE along the Bank fault-shear zone.

The MRE is 50% contained within 22 wireframes and 75% contained within 62 wireframes. The MRE considers a total of 374 mineralized zones defined by individual wireframes with a minimum true thickness of 2.0 metres. The MRE reports grade blocks inside volumes potentially mineable by underground methods at a cut-off grade of 3.5 g/t Au. The cut-off calculation below has been rounded up to 3.5 g/t Au to better represent a future mining cut-off.

Table 3: Parameters used to estimate the underground cut-off grade

for the Windfall Gold Deposit Mineral Resource Estimation

Parameters	Unit	Value
Gold Price	USD/oz	1,485
Exchange Rate	USD/CAD	1.3
Mill Recovery	%	94
Payability	%	99.95
Sell Cost	USD/oz	5
Royalties (NSR)	%	2
Mining Cost	C$/T milled	100
G&A Cost	C$/T milled	30
Processing Cost	C$/T milled	40
Transportation	C$/T milled	2
Environment	C$/T milled	10
Calculated Cut-off Grade	g/t Au	3.2
MRE Cut-off Grade	g/t Au	3.5

Windfall Gold Deposit Mineral Resource Estimate Notes

The independent qualified person for the 2021 MRE, as defined by NI 43-101 guidelines, is Pierre-Luc Richard, P.Geo.(OGQ#1119), of BBA Inc. The effective date of the estimate is November 30, 2020.
The Windfall mineral resource estimate is compliant with the November 29, 2019 CIM Estimation of Mineral Resources and Mineral Reserves Best Practice Guidelines.
These mineral resources are not mineral reserves as they have not demonstrated economic viability. The quantity and grade of reported Inferred mineral resources in this news release are uncertain in nature and there has been insufficient exploration to define these resources as Indicated or Measured; however, it is reasonably expected that the majority of Inferred Mineral Resources could be upgraded to Indicated Mineral Resources with continued exploration.
Resources are presented undiluted and in situ and are considered to have reasonable prospects for economic extraction. Isolated and discontinuous blocks above the stated cut-off grade are excluded from the mineral resource estimate. Must-take material, i.e. isolated blocks below cut-off grade located within a potentially mineable volume, was included in the mineral resource estimate.
As of November 30, 2020, the database comprises a total of 3,612 drill holes for 1,343,593 metres of drilling in the area extent of the mineral resource estimate, of which 2,959 drill holes (1,161,872 metres) were completed and assayed by Osisko. The drill hole grid spacing is approximately 12.5 metre x 12.5 metre for definition drilling, 25 metre x 25 metre for infill drilling and larger for extension drilling.
All core assays reported by Osisko were obtained by analytical methods described below under “Quality Control and Reporting Protocols”.
Geological interpretation of the deposit is based on lithologies, mineralization style, alteration and structural features. Most mineralization envelopes are subvertical, striking NE-SW and plunging approximately 40 degrees towards the North-East. The 3D wireframing was generated in Leapfrog Geo, a modelling software, from hand selections of mineralization intervals. The mineral resource estimate includes a total of 374 tabular, mostly sub-vertical domains defined by individual wireframes with a minimum true thickness of 2.0 metres.
Assays were composited within the mineralization domains into 2.0 metres length composites. A value of 0.00125 g/t Au and 0.0025 g/t Ag (¼ of the detection limit) was applied to unassayed core intervals.
High-grade composites were capped. Cappings were determined in each area from statistical studies on groups of zones sharing similar mineralization characteristics. Cappings vary from 10 g/t Au to 200 g/t Au and from 5 g/t Ag to 150 g/t Ag. A multiple capping strategy defined by capping values decreasing as interpolation search distances increase was used in the grade estimations.
Block models were produced using Datamine™ Studio RM Software. The models are defined by parent cell sizes of 5 metres NE, 2 meters NW and 5 metres height, and sublocked to minimum subcell sizes of 1.25 meters NE, 0.5 metres NW and 1.25 metres height.
Ordinary Kriging (OK) based interpolations were produced for gold estimations in each area of the Windfall deposit, while silver grade estimations were produced using Ordinary Kriging (OK) or Inverse Distance Squared (ID²) interpolations. Gold estimation parameters are based on composite variography analyses. The gold estimation parameters were used for the silver estimation.
Density values of 2.8 were applied to the mineralized zones.
The Windfall mineral resource estimate is categorized as measured, indicated and inferred mineral resource as follows:
a. The measured mineral resource category is manually defined and enclosed areas where:
i. the drill spacing is less than 12.5 metres,
ii. blocks are informed by a minimum of four drill holes,
iii. geological evidence is sufficient to confirm geological and grade continuity,
iv. zones have been accessed by underground workings.
b. The indicated mineral resource category is manually defined and encloses areas where:
i. the drill spacing is generally less than 12.5 metres,
ii. blocks are informed by a minimum of two drill holes,
iii. geological evidence is sufficient to assume geological and grade continuity.

c. The inferred mineral resource category is manually defined and encloses areas where:
i. drill spacing is less than 100 metres,
ii. blocks are informed by a minimum of two drill holes,
iii. geological evidence is sufficient to imply, but not verify geological and grade continuity.
The mineral resource is reported at 3.5 g/t Au cut-off. The cut-off grade is based on the following economic parameters: gold price at 1,485 USD/oz, exchange rate at 1.30 USD/CAD, 94% mill recovery; payability of 99.95%; selling cost at 5 USD/oz, 2% NSR royalties, mining cost at 100 C$/t milled, G&A cost at 30 C$/t milled, processing cost at 40 C$/t, transportation cost at 2 C$/t considering mill at site, and environment cost at 10 C$/t. A cut-off grade of 3.5 g/t Au was selected over the calculated cut-off grade of 3.2 g/t Au to better reflect a realistic mining cut-off.
Estimates use metric units (metres, tonnes and g/t). Metal contents are presented in troy ounces (metric tonne x grade / 31.10348).
The independent qualified person is not aware of any known environmental, permitting, legal, title-related, taxation, socio-political or marketing issues, or any other relevant issue, that could materially affect the mineral resource estimate.
Values in tonnes and ounces are rounded to nearest thousand which may cause apparent discrepancies.

Qualified Person

The Windfall mineral resource estimate, with an effective date of November 30, 2020, was (i) prepared by Judith St-Laurent, P.Geo (OGQ #1023), B.Sc., Director of Resources Estimation at Osisko, and (ii) reviewed and approved by Pierre-Luc Richard, M.Sc., P.Geo (OGQ#1119,), each of whom is a “qualified person” within the meaning of NI 43-101. Mr. Richard is an employee of BBA Inc. 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 news release has been reviewed and approved by Mr. Mathieu Savard, P.Geo (OGQ #510), President of Osisko, who is a “qualified person” within the meaning of NI 43-101.

Quality Control and Reporting Protocols

NQ core assays 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, Vancouver, British Colombia, Lima, Peru or Vientiane, Laos (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 a Four Acid Digestion-ICP-MS 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 Gold Deposit

The Windfall 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 this news release and assuming a cut-off grade of 3.50 g/t Au, comprises 521,000 tonnes at 11.3 g/t Au (189,000 ounces) in the measured mineral resource category, 5,502,000 tonnes at 9.4 g/t Au (1,668,000 ounces) in the indicated mineral resource category and 16,401,000 tonnes at 8.0 g/t Au (4,244,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in this news release, certain of which are described in this news release, will be further described in the full technical report being prepared for this updated mineral resource estimate in accordance with NI 43-101, and will be available on SEDAR (www.sedar.com) under the Corporation’s issuer profile within 45 days. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal zones: Lynx, Main Zone, and Underdog. Mineralization is generally comprised of sub-vertical zones following intrusive porphyry contacts plunging to the northeast. The resources are defined from surface to a depth of 1,600 metres as it now includes the Triple 8 (T8) zone. The resources excluding T8 are defined from surface to a depth of 1,200 metres. The deposit remains open along strike and at depth. Mineralization has been identified at surface in some areas and as deep as 2,625metres 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 gold deposit located between Val-d’Or and Chibougamau in Québec and holds a100% undivided interest in a large area of claims in the surrounding the Urban Barry area and nearby Quévillon area (over 2,700 square kilometres).

Cautionary Statements Regarding Estimates of Mineral Resources

This news release uses the terms measured, indicated and inferred mineral resources as a relative measure of the level of confidence in the 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 mineral resource estimate disclosed in this news release may be materially affected by geology, environmental, permitting, legal, title, socio-political, marketing or other relevant issues. 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 (“CIM”). Under NI 43-101, estimates of inferred mineral resources may not form the basis of feasibility or pre-feasibility studies or economic studies except for preliminary economic assessments. Readers are cautioned not to assume that further work on the stated resources will lead to mineral reserves that can be mined economically.

Cautionary Note Regarding Forward-Looking Information

CONTACT INFORMATION:

John Burzynski
Chief Executive Officer
Office Telephone (416) 363-8653

¹Non-audited estimation using actual exploration expenditures as of December 31^st, 2020 (excluding exploration ramp expenditures), the amount of metres drilled by Osisko since 2015 and considering Quebec Tax Exploration Credit returns divided by global ounces. This is considered a non-GAAP number.

OSISKO WINDFALL INFILL DRILLING: INSERT SUPERLATIVE HERE

Posted on January 26, 2021November 8, 2023 by Yannick Fradette

New Intercepts Include 108 g/t Au Over 10.5 Metres

(Toronto, January 26, 2021) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing expansion and definition drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Drilling is currently focused on the Lynx deposit. Osisko Chief Executive Officer John Burzynski commented: “Infill drilling at Windfall continues with more good results with respect to grade and width, particularly in the Lynx zones. Both underground and surface drills continue to infill our resources and explore open down plunge areas.”

The table below contains resource definition infill intercepts located inside the February 2020 mineral resource estimate wireframes (see Osisko news release dated February 19, 2020). Significant new analytical results are presented below and include 63 intercepts in 38 drill holes and 7 wedges.

Selected high-grade intercepts from the new results include: 108 g/t Au over 10.5 metres in OSK-W-20-2256-W7;21.7 g/t Au over 11.3 metres in OSK-W-20-2271-W3; 76.7 g/t Au over 3.0 metres in OSK-W-20-2377; 30.9 g/t Au over 4.5 metres in OSK-W-20-2292-W4; 35.1 g/ t Au over 2.8 metres in OSK-W-20-2325; and 36.5 g/t Au over 2.1 metres in OSK-W-20-2283-W3. 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	Zone	Corridor
OSK-W-20-847-W3	628.8	631.0	2.2	4.32		Caribou_2214	Caribou
including	629.5	630.0	0.5	12.9		Caribou_2214	Caribou
OSK-W-20-852-W4	548.0	550.0	2.0	8.55		Caribou_2524	Caribou
OSK-W-20-2256-W7	881.0	891.5	10.5	108	30.7	Lynx_361	Triple Lynx
including	885.8	887.0	1.2	567	100
and	887.5	888.6	1.1	302	100
OSK-W-20-2271-W3	1057.6	1068.9	11.3	21.7		Lynx_330	Lynx
including	1061.8	1062.1	0.3	64.1
and	1064.0	1064.3	0.3	92.8
OSK-W-20-2283-W3	870.0	872.0	2.0	11.2		Triple Lynx	Triple Lynx
including	871.1	871.5	0.4	41.8		Triple Lynx	Triple Lynx
	984.6	987.0	2.4	4.47		Triple Lynx	Triple Lynx
including	985.5	986.0	0.5	20.5		Triple Lynx	Triple Lynx
	991.4	993.5	2.1	36.5		Triple Lynx	Triple Lynx
including	992.0	992.8	0.8	95.7		Triple Lynx	Triple Lynx
OSK-W-20-2287	1158.9	1161.0	2.1	7.64		Lynx_346	Lynx
OSK-W-20-2292-W4	884.3	888.8	4.5	30.9	21.7	Lynx_375	Triple Lynx
including	887.3	888.0	0.7	159	100	Lynx_375	Triple Lynx
OSK-W-20-2301	94.7	96.7	2.0	8.14		F17_6003	F-17
including	96.0	96.7	0.7	21.6		F17_6003	F-17
	101.2	103.6	2.4	3.54		F17_6003	F-17
including	101.2	101.7	0.5	16.9		F17_6003	F-17
OSK-W-20-2306	199.5	205.3	5.8	7.48		Bobcat	Bobcat
including	202.3	202.8	0.5	43.8		Bobcat	Bobcat
OSK-W-20-2313-W2	979.3	981.4	2.1	8.56		Triple Lynx	Triple Lynx
including	979.8	980.2	0.4	21.8		Triple Lynx	Triple Lynx
OSK-W-20-2319	210.0	212.0	2.0	4.83		Bobcat	Bobcat
OSK-W-20-2325	128.0	130.8	2.8	35.1	25.6	Mallard_5200	Mallard
including	130.1	130.8	0.7	138	100	Mallard_5200	Mallard
	143.6	145.8	2.2	13.1		Mallard_5213	Mallard
OSK-W-20-2326	82.0	86.0	4.0	9.47		Mallard_5213	Mallard
including	82.0	83.0	1.0	29.5		Mallard_5213	Mallard
OSK-W-20-2327	94.0	96.7	2.7	14.1		Mallard_5213	Mallard
including	96.0	96.7	0.7	33.7		Mallard_5213	Mallard
OSK-W-20-2328	177.0	182.5	5.5	6.50		Caribou_2527	Caribou
OSK-W-20-2330	137.7	140.0	2.3	9.57		Mallard_5213	Mallard
including	138.8	139.4	0.6	35.1		Mallard_5213	Mallard
OSK-W-20-2332	191.7	194.7	3.0	6.03		Mallard_5213	Mallard
OSK-W-20-2346	892.0	894.2	2.2	12.2		Lynx_330	Lynx
including	893.5	893.8	0.3	78.5		Lynx_330	Lynx
OSK-W-20-2354	653.3	655.9	2.6	5.39		Caribou_2233	Caribou
including	654.1	654.5	0.4	19.7		Caribou_2233	Caribou
OSK-W-20-2362	137.0	139.0	2.0	4.19		Bobcat	Bobcat
OSK-W-20-2377	105.0	108.0	3.0	76.7	22.7	F17_6003	F-17
including	106.0	106.4	0.4	505	100	F17_6003	F-17
OSK-W-20-2384	644.5	646.9	2.4	26.2		Lynx_341	Lynx
including	645.3	645.9	0.6	96.5		Lynx_341	Lynx
OSK-W-20-2389	589.0	591.0	2.0	5.72		Caribou	Caribou
WST-20-0011	278.8	280.8	2.0	15.5		Lynx SW	Lynx SW
WST-20-0346	29.0	31.0	2.0	4.57		Mallard_5212	Mallard
WST-20-0347	270.0	272.9	2.9	3.31		Caribou_2572	Caribou
including	272.1	272.9	0.8	11.4		Caribou_2572	Caribou
WST-20-0348	237.6	239.7	2.1	7.49		Caribou_2573	Caribou
	271.5	273.5	2.0	4.68		Caribou_2572	Caribou
including	272.5	272.9	0.4	22.6		Caribou_2572	Caribou
WST-20-0349	293.2	296.0	2.8	3.64		Caribou_2572	Caribou
including	294.0	295.0	1.0	9.56		Caribou_2572	Caribou
WST-20-0476	154.9	157.1	2.2	4.85		Caribou_2551	Caribou
including	154.9	155.6	0.7	11.9		Caribou_2551	Caribou
	172.9	175.5	2.6	3.33		Caribou_2551	Caribou
WST-20-0477	151.5	154.0	2.5	5.90		Caribou_2551	Caribou
WST-20-0480B	60.0	62.0	2.0	12.3		Mallard_5211	Mallard
WST-20-0518	168.0	170.0	2.0	4.53		Z27_1102	Zone 27
WST-20-0520	63.5	66.0	2.5	5.53		Mallard_5211	Mallard
	81.5	84.0	2.5	12.3		Mallard_5211	Mallard
including	82.4	82.7	0.3	94.8		Mallard_5211	Mallard
	157.0	159.3	2.3	4.53		Z27_1102	Zone 27
	352.4	354.4	2.0	11.8		Caribou_2253	Caribou
including	352.8	353.9	1.1	21.2		Caribou_2253	Caribou
WST-20-0533	96.0	98.1	2.1	7.13		Lynx_304	Lynx
including	97.2	98.1	0.9	16.6		Lynx_304	Lynx
WST-20-0534	69.0	71.0	2.0	21.4		Lynx_323	Lynx
including	70.2	71.0	0.8	53.5		Lynx_323	Lynx
WST-20-0535	46.9	49.1	2.2	5.83		Lynx_303	Lynx
including	46.9	47.5	0.6	18.1		Lynx_303	Lynx
WST-20-0536	83.0	85.0	2.0	17.9		Lynx	Lynx
including	83.4	83.8	0.4	84.1		Lynx	Lynx
WST-20-0549	11.0	13.0	2.0	12.3		Mallard_5211	Mallard
	263.0	265.0	2.0	5.39		Caribou_2518	Caribou
	269.5	271.5	2.0	3.94		Caribou_2518	Caribou
	306.0	308.0	2.0	3.26		Caribou_2521	Caribou
including	307.2	308.0	0.8	7.40		Caribou_2521	Caribou
	373.9	377.0	3.1	4.60		Caribou_2542	Caribou
WST-20-0565	11.0	13.2	2.2	11.6		Mallard_5211	Mallard
including	11.6	12.4	0.8	24.0		Mallard_5211	Mallard
WST-20-0566A	306.4	311.7	5.3	9.25		Caribou_2521	Caribou
including	307.3	308.3	1.0	36.2		Caribou_2521	Caribou
WST-20-0568	295.9	298.0	2.1	7.62		Lynx SW	Lynx SW
including	296.6	297.4	0.8	15.7		Lynx SW	Lynx SW
	317.0	319.0	2.0	3.94		Lynx SW	Lynx SW
including	317.7	318.1	0.4	19.5		Lynx SW	Lynx SW
WST-20-0582	103.1	106.0	2.9	7.01		Lynx_339	Lynx
	129.5	131.5	2.0	9.97		Lynx_311	Lynx
including	130.0	131.0	1.0	19.9		Lynx_311	Lynx
WST-20-0586	99.5	101.5	2.0	6.81		Lynx_311	Lynx
	141.0	143.1	2.1	20.0		Lynx	Lynx
including	142.2	142.7	0.5	79.3		Lynx	Lynx
	160.0	162.5	2.5	14.4		Lynx_359	Lynx
including	161.3	161.8	0.5	54.1		Lynx_359	Lynx
WST-20-0587	165.0	167.2	2.2	3.33		Lynx_304	Lynx
including	166.6	167.2	0.6	10.9		Lynx_304	Lynx
WST-20-0589	63.5	65.6	2.1	8.09		Mallard_5211	Mallard
	330.4	332.4	2.0	6.21		Caribou_2253	Caribou

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below. SW = Southwest

Drill hole location

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-20-847-W3	334	-69	649	452645	5434429	403	2625
OSK-W-20-852-W4	330	-55	873	452874	5434552	398	2875
OSK-W-20-2256-W7	125	-51	1005	453160	5435686	411	3675
OSK-W-20-2271-W3	120	-53	1235	453462	5435683	410	3950
OSK-W-20-2283-W3	135	-50	1004	452997	5435607	425	3500
OSK-W-20-2287	116	-53	1406	453607	5435714	404	4075
OSK-W-20-2292-W4	125	-54	984	453035	5435561	420	3525
OSK-W-20-2301	149	-49	140	452696	5435534	410	3200
OSK-W-20-2306	152	-55	531	452872	5435155	409	3175
OSK-W-20-2313-W2	134	-52	1047	452965	5435583	420	3450
OSK-W-20-2319	141	-50	768	452872	5435153	409	3175
OSK-W-20-2325	331	-53	171	451946	5434809	406	2200
OSK-W-20-2326	335	-50	156	451920	5434828	403	2175
OSK-W-20-2327	334	-49	132	451899	5434812	401	2150
OSK-W-20-2328	136	-56	942	452872	5435153	409	3175
OSK-W-20-2330	333	-48	156	451912	5434792	402	2150
OSK-W-20-2332	335	-49	222	452019	5434790	406	2250
OSK-W-20-2346	130	-53	1161	453397	5435557	413	3825
OSK-W-20-2354	336	-60	759	452739	5434474	401	2725
OSK-W-20-2362	350	-45	256	452719	5434777	398	2850
OSK-W-20-2377	132	-49	1326	452702	5435548	409	3225
OSK-W-20-2384	127	-52	1164	453397	5435557	413	3825
OSK-W-20-2389	328	-57	701	452689	5434635	398	2750
WST-20-0011	157	-54	451	453105	5435065	231	3325
WST-20-0346	136	-18	391	452282	5434975	264	2575
WST-20-0347	134	-14	369	452282	5434975	264	2575
WST-20-0348	127	-14	311	452282	5434976	264	2575
WST-20-0349	140	-19	378	452282	5434975	263	2575
WST-20-0476	132	-33	403	452282	5434975	263	2575
WST-20-0477	131	-30	394	452282	5434976	263	2575
WST-20-0480B	142	-52	382	452281	5434975	262	2575
WST-20-0518	135	-53	441	452282	5434975	263	2575
WST-20-0520	133	-46	388	452281	5434975	263	2575
WST-20-0533	143	-26	133	453315	5435165	124	3575
WST-20-0534	143	-32	135	453315	5435165	124	3575
WST-20-0535	143	-37	138	453315	5435165	124	3575
WST-20-0536	132	-27	135	453316	5435166	124	3575
WST-20-0549	141	-13	396	452208	5434898	249	2475
WST-20-0565	134	-12	354	452208	5434898	249	2475
WST-20-0566A	133	-16	368	452208	5434898	248	2475
WST-20-0568	158	-58	493	453104	5435065	231	3325
WST-20-0582	176	-56	144	453177	5435125	173	3425
WST-20-0586	167	-13	193	453418	5435305	69	3725
WST-20-0587	145	-43	205	453418	5435305	69	3725
WST-20-0589	147	-55	376	452281	5434975	263	2575

Lynx Zone

Triple Lynx

Mineralization occurs as quartz-carbonate-pyrite-tourmaline vein-type associated with pervasive sericite-pyrite ± silica alteration and contain sulphides similar to the main Lynx Zone: pyrite dominated with minor other sulphides ranging from trace to up to 70% locally, and local visible gold. Locally fuchsite is present when proximal to the gabbros. Mineralization is hosted in or at the contacts of felsic porphyritic dikes with rhyolites (locally bleached) or gabbros.

Zone 27

Mineralization is typically characterized by 5% to 50% disseminated, stringer, semi-massive or stockwork pyrite, ptygmatic tourmaline veins, quartz-tourmaline crustiform veins, and local quartz-carbonate veins. Local visible gold is observed as small specks or clusters with quartz veins. Alteration consists of moderate to strong sericite, weak to strong silica, weak chlorite and carbonate and locally weak fuchsite. Mineralization is hosted in strongly altered andesites or in or at the contact of the rhyolite.

Caribou Zone

F-Zone

Mallard

Bobcat

Mineralization most commonly occurs in gold-bearing quartz-pyrite veins controlled by northeast trending faults and shears and to a lesser extent in minor crustiform quartz-tourmaline-ankerite-pyrite veins and pyrite replacement zones and stockwork. Local visible gold is associated with carbonate ± silica ± chlorite alteration. Mineralization is hosted in sheared mafic volcanics, rhyolites near faults, or at the contact with felsic porphyritic intrusions.

Qualified Person

Quality Control and Reporting Protocols

True width determination is estimated at 55-80% 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 a four acids digestion -MS61 method at ALS Laboratories. Drill program design, QualityAssurance/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 Gold Deposit

The Windfall gold deposit is located between Val-d’Or and Chibougamau in Eeyou Istchee James Bay, Québec, Canada. The mineral resource defined by Osisko, as disclosed in the news release dated February 19, 2020 and supported by the technical report entitled “An updated mineral resource estimate for the Windfall Lake Project, Located in the Abitibi Greenstone Belt, Urban Township, Eeyou Istchee James Bay, Québec, Canada” and dated April 3, 2020 (with an effective date of January 3, 2020), and assuming a cut-off grade of 3.5 g/t, comprises 4,127,000 tonnes at 9.1 g/t Au (1,206,000 ounces) in the indicated mineral resource category and 14,532,000 tonnes at 8.40 g/t Au (3,938,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the February 19,2020 news release are further described in the full technical report prepared by Micon International Limited (“Micon”) and BBA Inc (“BBA”), in accordance with NI 43-101 available on SEDAR (www.sedar.com) under the Corporation’s issuer profile. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal zones:Lynx, Main Zone, and Underdog. Mineralization is generally comprised of deformed sub-vertical zones plunging to the northeast. Vein-type or pyrite replacement-type styles of mineralization crosscut syn-volcanic host rocks and syn-deformation felsic porphyry intrusions and are spatially associated with the contacts of the intrusions. The deposit is well defined from surface to a depth of 1,200 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 gold deposit located between Val-d’Or and Chibougamau in Québec and holds a100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quévillon area (over 2,700 square kilometres).

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. Any statement that involves 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”, “potential”, “feasibility”, “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 news release contains the forward-looking information pertaining to, among other things: the Windfall gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate; the prospects, if any, of the Windfall gold deposit; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; the projected capital expenditures of mining activities at the Windfall gold deposit; upgrading an inferred mineral resource to a measured mineral resource or indicated mineral resource category; future drilling at the Windfall gold deposit; the deposit remaining open along strike to the northeast and at depth; significant high-grade zones (Lynx 4, Triple Lynx) remaining open down plunge; the plunge potential of the Lynx and Underdog zones; the significance of historic exploration activities and results. 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 and royalty interests in the Windfall gold deposit; the ability of the Corporation to obtain required approvals; 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.

CONTACT INFORMATION:

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

OSISKO WINDFALL INFILL DRILLING

Posted on January 18, 2021November 8, 2023 by Yannick Fradette

New Intercepts Include 90.5 g/t Au Over 9.7 Metres in Triple Lynx

(Toronto, January 18, 2021) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide new analytical results from the ongoing expansion and definition drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

Drilling is currently focused on the Lynx deposit. Osisko Chief Executive Officer John Burzynski commented: “Broken record alert, infill drilling continues to show both the continuity and high-grade nature of Lynx, consistently returning good results on grade and widths as demonstrated by today’s headline hole. We are advancing our work on the deposit at full speed, with over 35 drills active on surface and underground.”

Selected high-grade intercepts from the new results include: 90.5 g/t Au over 9.7 meters in OSK-W-20-2252-W7; 59.5 g/t Au over 2.0 metres in OSK-W-20-2292-W5; 38.4 g/t Au over 5.5 meters in OSK-W-20-2252-W8; 37.1 g/t Au over 2.0 metres in WST-20-0542A; 32.2 g/t Au over 3.7 metres in OSK-W-20-2243-W6. 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	Zone	Corridor
OSK-W-20-2139-W12	913.0	915.0	2.0	3.96		Lynx_361	Triple Lynx
OSK-W-20-2243-W6	925.2	928.9	3.7	32.2		Triple Lynx	Triple Lynx
including	927.2	928.2	1.0	55.2		Triple Lynx	Triple Lynx
OSK-W-20-2252-W7	861.3	866.6	5.3	4.54		Triple Lynx	Triple Lynx
including	866.3	866.6	0.3	16.6		Triple Lynx	Triple Lynx
	871.0	876.0	5.0	5.45		Triple Lynx	Triple Lynx
	900.0	909.7	9.7	90.5	32.3	Lynx_371	Triple Lynx
including	904.7	905.2	0.5	324	100
and	905.6	906.2	0.6	725	100
	911.2	913.3	2.1	7.79		Lynx_361	Triple Lynx
including	912.1	912.4	0.3	33.7		Lynx_361	Triple Lynx
	961.9	964.0	2.1	13.7		Lynx_363	Triple Lynx
including	962.8	963.1	0.3	75.9		Lynx_363	Triple Lynx
	987.0	989.3	2.3	3.76		Lynx_364	Triple Lynx
OSK-W-20-2252-W8	877.0	879.0	2.0	4.30		Lynx_371	Triple Lynx
	921.8	924.1	2.3	23.7		Lynx_361	Triple Lynx
including	922.8	923.4	0.6	62.1		Lynx_361	Triple Lynx
	967.0	972.5	5.5	38.4		Lynx_363	Triple Lynx
including	969.6	970.6	1.0	91.7
and	970.6	971.6	1.0	69.5
OSK-W-20-2271-W2	1038.0	1040.0	2.0	3.79		Lynx_330	Lynx
OSK-W-20-2275	756.0	758.0	2.0	4.76		Triple Lynx	Triple Lynx
OSK-W-20-2275-W3	864.7	867.2	2.5	3.68		Triple Lynx	Triple Lynx
OSK-W-20-2275-W4	933.9	936.2	2.3	3.62		Triple Lynx	Triple Lynx
OSK-W-20-2280-W3	1039.0	1041.0	2.0	4.33		Lynx_363	Triple Lynx
including	1039.6	1039.9	0.3	26.3		Lynx_363	Triple Lynx
	1045.0	1047.0	2.0	4.58		Lynx_363	Triple Lynx
including	1046.2	1046.5	0.3	28.8		Lynx_363	Triple Lynx
OSK-W-20-2280-W4	1124.0	1129.0	5.0	7.04		Lynx_370	Triple Lynx
including	1125.3	1125.8	0.5	30.0		Lynx_370	Triple Lynx
OSK-W-20-2280-W5	888.7	890.7	2.0	19.2		Triple Lynx	Triple Lynx
including	890.1	890.7	0.6	62.3		Triple Lynx	Triple Lynx
OSK-W-20-2283-W1	826.0	828.0	2.0	3.91		Triple Lynx	Triple Lynx
OSK-W-20-2283-W6	844.8	847.0	2.2	3.62		Triple Lynx	Triple Lynx
including	844.8	845.3	0.5	13.0		Triple Lynx	Triple Lynx
OSK-W-20-2292-W5	1039.0	1041.0	2.0	59.5	20.3	Triple Lynx	Triple Lynx
including	1039.4	1039.8	0.4	296	100	Triple Lynx	Triple Lynx
OSK-W-20-2292-W6	884.4	886.5	2.1	8.95		Triple Lynx	Triple Lynx
OSK-W-20-2345	144.2	150.0	5.8	4.23		Lynx_355	Lynx
OSK-W-20-2350	112.5	115.0	2.5	22.9	20.6	Lynx_335	Lynx
including	113.5	113.9	0.4	115	100	Lynx_335	Lynx
	137.0	139.0	2.0	16.3	15.8	Lynx_355	Lynx
including	137.5	137.8	0.3	103	100	Lynx_355	Lynx
OSK-W-20-2363	686.0	688.0	2.0	3.82		Lynx_365	Triple Lynx
WST-20-0011	295.4	297.6	2.2	3.66		Lynx SW	Lynx
including	296.4	297.0	0.6	11.4		Lynx SW	Lynx
WST-20-0490	114.0	116.1	2.1	28.1	27.7	Lynx_339	Lynx
including	115.4	115.8	0.4	102	100	Lynx_339	Lynx
	294.3	296.4	2.1	5.57		Triple Lynx	Triple Lynx
including	295.7	296.1	0.4	21.7		Triple Lynx	Triple Lynx
WST-20-0498	142.0	144.0	2.0	3.38		Lynx	Lynx
WST-20-0503	54.0	56.0	2.0	3.76		Lynx_311	Lynx
WST-20-0505A	280.0	282.0	2.0	3.19		Lynx SW	Lynx SW
WST-20-0516	168.0	170.0	2.0	23.8		Lynx_359	Lynx
including	168.5	169.3	0.8	43.0		Lynx_359	Lynx
WST-20-0525	159.7	161.8	2.1	10.8		Lynx_359	Lynx
including	160.3	160.6	0.3	52.7		Lynx_359	Lynx
WST-20-0536	91.0	93.0	2.0	14.2		Lynx_304	Lynx
including	91.7	92.1	0.4	66.9		Lynx_304	Lynx
	98.0	100.0	2.0	13.5		Lynx_304	Lynx
including	98.6	98.9	0.3	83.8		Lynx_304	Lynx
	111.0	113.0	2.0	8.90		Lynx_359	Lynx
including	111.8	112.6	0.8	22.2		Lynx_359	Lynx
	117.0	119.0	2.0	3.26		Lynx_359	Lynx
WST-20-0537	99.8	101.9	2.1	5.28		Lynx_304	Lynx
WST-20-0542A	46.9	49.1	2.2	30.3		Lynx_303	Lynx
including	46.9	47.6	0.7	94.0		Lynx_303	Lynx
	64.3	66.3	2.0	37.1		Lynx_323	Lynx
including	65.2	66.3	1.1	63.3		Lynx_323	Lynx
WST-20-0545	95.7	98.0	2.3	18.1		Lynx_304	Lynx
	124.0	127.1	3.1	10.6		Lynx_359	Lynx
including	126.6	127.1	0.5	46.2		Lynx_359	Lynx
WST-20-0569	243.0	245.0	2.0	13.7		Lynx SW	Lynx SW
including	243.8	244.2	0.4	67.3		Lynx SW	Lynx SW
WST-20-0571	413.0	415.0	2.0	6.65		Lynx SW	Lynx SW
including	413.0	414.0	1.0	13.3		Lynx SW	Lynx SW

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below.

SW= Southwest

Drill hole location

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-20-2139-W12	115	-52	1038	452980	5435549	420	3450
OSK-W-20-2243-W6	122	-54	965	453086	5435526	417	3550
OSK-W-20-2252-W7	129	-54	1191	453241	5435694	415	3750
OSK-W-20-2252-W8	129	-54	1239	453241	5435694	415	3750
OSK-W-20-2271-W2	120	-53	1223	453462	5435683	410	3950
OSK-W-20-2275	127	-49	1094	452888	5435583	409	3400
OSK-W-20-2275-W3	127	-49	1050	452888	5435583	409	3400
OSK-W-20-2275-W4	127	-49	1052	452888	5435583	409	3400
OSK-W-20-2280-W3	127	-58	1191	453304	5435639	415	3775
OSK-W-20-2280-W4	127	-58	1215	453304	5435639	415	3775
OSK-W-20-2280-W5	127	-58	1134	453304	5435639	415	3775
OSK-W-20-2283-W1	135	-50	1035	452997	5435607	425	3500
OSK-W-20-2283-W6	135	-50	957	452997	5435607	425	3500
OSK-W-20-2292-W5	125	-54	1134	453035	5435561	420	3525
OSK-W-20-2292-W6	125	-54	1110	453035	5435561	420	3525
OSK-W-20-2345	336	-62	162	452828	5434780	397	2950
OSK-W-20-2350	324	-62	177	452854	5434793	397	2975
OSK-W-20-2363	139	-52	1031	452930	5435548	419	3425
WST-20-0011	157	-54	451	453105	5435065	231	3325
WST-20-0490	160	-31	430	453256	5435209	97	3525
WST-20-0498	132	-11	169	453228	5435126	136	3475
WST-20-0503	148	6	99	453105	5435065	232	3325
WST-20-0505A	183	-45	331	453227	5435125	134	3475
WST-20-0516	168	-33	195	453418	5435305	69	3725
WST-20-0525	165	-20	187	453418	5435305	69	3725
WST-20-0536	132	-27	135	453316	5435166	124	3575
WST-20-0537	132	-32	139	453316	5435166	124	3575
WST-20-0542A	156	-30	138	453315	5435165	124	3550
WST-20-0545	112	-24	148	453316	5435166	124	3575
WST-20-0569	165	-59	526	453104	5435065	231	3325
WST-20-0571	167	-55	465	453104	5435065	231	3325

Lynx Zone

Triple Lynx

Mineralization in the Triple Lynx zone is vein-type, quartz-carbonate-pyrite-tourmaline veins, associated with pervasive sericite-pyrite ± silica alteration and contain sulphides similar to the main Lynx Zone, pyrite dominated with minor other sulphides, ranging from trace to up to 70% locally, and local visible gold. Locally fuchsite is present when proximal to the gabbros. Mineralization is hosted in or at the contacts of felsic porphyritic dikes with rhyolites (locally bleached) or gabbros.

Qualified Person

Quality Control and Reporting Protocols

True width determination is estimated at 55-80% 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 a four acids digestion -MS61 method at ALS Laboratories. Drill program design, QualityAssurance/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 Gold Deposit

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 gold deposit located between Val-d’Or and Chibougamau in Québec and holds a100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quévillon area (over 2,700 square kilometres).

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. Any statement that involves 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”, “potential”, “feasibility”, “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 news release contains the forward-looking information pertaining to, among other things: the Windfall gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate; the prospects, if any, of the Windfall gold deposit; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; the projected capital expenditures of mining activities at the Windfall gold deposit; upgrading an inferred mineral resource to a measured mineral resource or indicated mineral resource category; future drilling at the Windfall gold deposit; the deposit remaining open along strike to the northeast and at depth; significant high-grade zones (Lynx 4, Triple Lynx) remaining open down plunge; the plunge potential of the Lynx and Underdog zones; the significance of historic exploration activities and results. 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 and royalty interests in the Windfall gold deposit; the ability of the Corporation to obtain required approvals; 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.

CONTACT INFORMATION:

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

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Category: Windfall

OSISKO EXPANSION DRILLING ADDS NEW HIGH GRADE AT LYNX

Drill hole location

OSISKO EXPANSION DRILLING ADDS NEW HIGH GRADE AT WINDFALL

Drill hole location

OSISKO MINING ORDERS MILLING EQUIPMENT FOR WINDFALL

OSISKO FILES TECHNICAL REPORT FOR WINDFALL MINERAL RESOURCE ESTIMATE UPDATE

OSISKO WINDFALL INFILLS WITH HIGH-GRADE IN MULTIPLE ZONES 35.7 g/t Au Over 9.8 Metres in Underdog 65.6 g/t Au over 4.2 meters in Caribou

Drill hole location

OSISKO INFILL CONTINUES TO DELIVER WITH 342 g/t Au OVER 2.5 METRES

Drill hole location

EXPANSION DRILLING ADDS NEW HIGH-GRADE FOR OSISKO

Drill hole location

OSISKO MINING UPDATES WINDFALL MINERAL RESOURCE ESTIMATE

OSISKO WINDFALL INFILL DRILLING: INSERT SUPERLATIVE HERE

Drill hole location

OSISKO WINDFALL INFILL DRILLING

Drill hole location

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