OSISKO WINDFALL DRILLING DISCOVERS NEW GOLD ZONE NEAR LYNX 4

Posted on March 23, 2022November 8, 2023 by lboivin

60.7 g/t Au Over 5.0 Metres

(Toronto, March 23, 2022) 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.

Expansion drilling in the Lynx 4 area has defined a new sub-vertical zone located 80 metres south-west of wireframe LX4-3449 and 150 metres under wireframe LX4-3451. The new mineralization is currently defined by 18 intercepts (13 new intercepts and five holes previously reported, results presented below) over an area measuring 200 metres x 300 metres and remains open for expansion in several directions. High-grade mineralization typical of the Lynx area defines the new zone with disseminated pyrite associated with strong pervasive silica alteration hosted in a sericitized rhyolite. This new zone is located outside the January 2022 mineral resource estimate (see Osisko news release dated January 10, 2022), and with continued definition drilling will result in a new resource wireframe.

Osisko Chief Executive Officer John Burzynski commented: “The expansion program at Windfall continues to pay dividends as illustrated by today’s announcement of a new zone outside our current resources. These results confirm how prolific the Lynx area is with respect to resource growth. We will continue to selectively target open areas where previous holes highlight strong potential for additional ounces.”

Selected high-grade intercepts include: 60.7 g/t Au over 5.0 metres in OSK-W-21-2601; 76.4 g/t Au over 3.6 metres in OSK-W-21-2540-W3; and 30.5 g/t Au over 2.0 metres in OSK-W-21-2369-W3. Maps showing hole locations and full analytical results are available at www.osiskomining.com. Maps: Long Section_LX4 EN New Zone_20220323, Long Section_LX4 EN Ext_20220323, PR_EN_20220323_Lynx4-New Zone.

Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	Au (g/t) cut to 100 g/t	Corridor
OSK-W-21-1949-W14	1307.1	1313.0	5.9	3.57		Lynx 4
including	1311.6	1311.9	0.3	11.6		Lynx 4
OSK-W-21-2369-W3	1261.8	1264.5	2.7	5.16		Lynx 4
	1267.0	1269.0	2.0	30.5	24.9	Lynx 4
including	1268.1	1268.4	0.3	137	100	Lynx 4
OSK-W-21-2540-W3	1409.4	1413.0	3.6	76.4	24.2	Lynx 4
including	1409.4	1410.1	0.7	368	100	Lynx 4
	1416.3	1419.0	2.7	7.02		Lynx 4
	1420.8	1423.0	2.2	5.80		Lynx 4
OSK-W-21-2540-W6	1361.8	1364.0	2.2	4.74		Lynx 4
including	1361.8	1362.3	0.5	20.6		Lynx 4
	1409.0	1411.0	2.0	20.6		Lynx 4
including	1409.3	1409.8	0.5	76.6		Lynx 4
	1480.0	1483.0	3.0	4.25		Lynx 4
including	1482.5	1483.0	0.5	11.8		Lynx 4
	1490.2	1495.0	4.8	5.84		Lynx 4
OSK-W-21-2601	1328.1	1332.0	3.9	5.30		Lynx 4
	1426.5	1431.5	5.0	60.7	45.6	Lynx 4
including	1426.5	1426.8	0.3	282	100	Lynx 4
	1459.0	1461.0	2.0	7.39		Lynx 4
including	1459.6	1460.0	0.4	36.3		Lynx 4
OSK-W-21-2369-W3*	1215.9	1218.0	2.1	5.17		Lynx 4
	1223.7	1226.1	2.4	15.5		Lynx 4
OSK-W-20-2170-W6**	1367.8	1370.0	2.2	6.61		Lynx 4
	1379.0	1381.0	2.0	14.5
	1384.0	1386.4	2.4	6.70

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below. *Results previously released on April 27, 2021, **results previously released on January 11, 2021, and October 7, 2020.

Drill hole location

Hole No.	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-21-1949-W14	105	-57	1332	453440	5435479	401	3825
OSK-W-21-2369-W3	130	-56	1415	453424	5435566	410	3850
OSK-W-21-2540-W3	117	-60	1470	453465	5435640	410	3925
OSK-W-21-2540-W6	117	-60	1541	453465	5435640	410	3925
OSK-W-21-2601	125	-61	1500	453425	5435657	413	3900

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 in thickness. 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 can locally 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), Director of Exploration for Osisko’s Windfall 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 3.5 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 Estimate (“MRE“) defined by Osisko, as disclosed in the news release dated January 10, 2022 is supported by the technical report entitled “Mineral Resource Estimate Update for the Windfall Project” dated February 10, 2022 (with an effective date of October 21, 2021), and assuming a cut-off grade of 3.50 g/t Au, comprises 565,000 tonnes at 11.6 g/t Au (210,000 ounces) in the measured mineral resource category, 8,907,000 tonnes at 10.5 g/t Au (2,994,000 ounces) in the indicated mineral resource category and 13,035,000 tonnes at 8.6 g/t Au (3,585,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the January 10, 2022, news release, certain of which are described in the January 10, 2022, news release, are further described in the full technical report for this updated mineral resource estimate 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 2,500 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 WINDFALL DRILLING INTERCEPT HIGH GRADE IN LYNX

Posted on March 16, 2022November 8, 2023 by lboivin

431 g/t Au over 4.7 metres

(Toronto, March 16, 2022) 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 50 intercepts in 27 drill holes (2 from surface, 25 from underground) and 8 wedges. The infill intercepts are located inside defined January 2022 mineral resource estimate (“MRE”) blocks (see Osisko news release dated January 10, 2022). The expansion intercepts are located outside the January 2022 MRE blocks and either expand resource wireframes or are in a defined zone or corridor but do not yet correlate to a specific wireframe.

Osisko Chief Executive Officer John Burzynski commented: “The Lynx infill and expansion drill programs continue to impress with respect to both high-grade and width. A third of today’s intercepts are greater than an ounce per ton gold and a third are greater than five meters in length. Drilling at Windfall remains focused on Lynx and other strategic areas.”

Selected high-grade intercepts include: 431 g/t Au over 4.7 metres and 32.6 g/t Au over 3.4 metres in WST-21-0929B; 187 g/t Au over 5.4 metres in OSK-W-21-2601-W1; 103 g/t Au over 6.6 metres in WST-21-0907; 65.5 g/t Au over 7.4 metres in OSK-W-21-2605-W1; 45.2 g/t Au over 8.5 metres in WST-21-0934; 22.1 g/t Au over 12.0 metres in OSK-W-21-2613-W1; 116 g/t Au over 2.1 metres in WST-21-0994; 36.0 g/t Au over 6.4 metres in OSK-W-21-1949-W16; 42.1 g/t Au over 5.2 metres in WST-21-0689A and 23.9 g/t Au over 5.6 metres in OSK-W-21-2381-W3. Maps showing hole locations and full analytical results are available at www.osiskomining.com. Maps: Long Section_All zones In EN 20220316, Long Section_All zones Ex EN 20220316, PR_EN_20220316_Surface, PR_EN_20220316_UG.

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-21-1949-W16	624.7	631.1	6.4	36.0	22.6	LXM_3388	Lynx
including	629.6	630.0	0.4	298	100
and	630.0	630.4	0.4	116	100
OSK-W-21-2287-W12	1200.3	1202.5	2.2	14.3		LX4_3449	Lynx 4
including	1200.3	1201.2	0.9	31.8		LX4_3449	Lynx 4
OSK-W-21-2564-W1	742.0	744.1	2.1	33.9	25.9	TLX_3171	Triple Lynx
including	742.7	743.2	0.5	134	100	TLX_3171	Triple Lynx
OSK-W-21-2605	1304.0	1306.0	2.0	7.18		LX4_3445	Lynx 4
OSK-W-21-2605-W1	1295.7	1303.1	7.4	65.5	25.0	LX4_3449	Lynx 4
including	1296.4	1296.8	0.4	754	100
and	1296.8	1297.7	0.9	142	100
OSK-W-21-2613-W1	980.0	982.9	2.9	7.04		TLX_3161	Triple Lynx
including	981.8	982.9	1.1	14.6		TLX_3161	Triple Lynx
	1116.0	1128.0	12.0	22.1	19.9	TLX_3160	Triple Lynx
including	1118.2	1119.0	0.8	132	100
and	1127.0	1128.0	1.0	68.0
	1131.0	1133.0	2.0	5.13		TLX_3160	Triple Lynx
WST-21-0689A	217.8	223.0	5.2	42.1	24.7	TLX_3161	Triple Lynx
including	220.0	220.5	0.5	281	100	TLX_3161	Triple Lynx
WST-21-0713	26.7	33.0	6.3	5.34		LXM_3303	Lynx
including	32.1	33.0	0.9	18.3		LXM_3303	Lynx
WST-21-0877	328.5	331.0	2.5	7.63		LSW_3556	Lynx SW
including	329.2	329.5	0.3	56.5		LSW_3556	Lynx SW
WST-21-0907	527.7	534.3	6.6	103	32.4	LX4_3401	Lynx 4
including	530.4	531.4	1.0	565	100	LX4_3401	Lynx 4
WST-21-0929B	550.4	553.8	3.4	32.6	12.7	LX4_3404	Lynx 4
including	553.0	553.3	0.3	326	100	LX4_3404	Lynx 4
	564.8	569.5	4.7	431	62.6	LX4_3430	Lynx 4
including	564.8	565.6	0.8	293	100
and	565.6	566.4	0.8	2010	100
and	567.0	568.0	1.0	147	100
WST-21-0933A	331.0	333.5	2.5	4.76		TLX_3166	Triple Lynx
	498.4	500.4	2.0	31.2	25.2	LX4_3450	Lynx 4
including	499.0	499.3	0.3	140	100	LX4_3450	Lynx 4
WST-21-0934	481.1	489.6	8.5	45.2	22.9	LX4_3430	Lynx 4
including	483.6	484.5	0.9	236	100
and	485.9	486.2	0.3	323	100
WST-21-0948	504.6	506.8	2.2	27.9	23.1	LX4_3409	Lynx 4
including	504.6	504.9	0.3	136	100	LX4_3409	Lynx 4
WST-21-0956	244.6	246.6	2.0	41.9		TLX_3121	Triple Lynx
	251.0	253.3	2.3	40.5		TLX_3121	Triple Lynx
including	252.0	252.5	0.5	96.7		TLX_3121	Triple Lynx
WST-21-0961	199.0	201.1	2.1	17.8		TLX_3161	Triple Lynx
including	199.7	200.4	0.7	52.1		TLX_3161	Triple Lynx
WST-21-0964	484.0	486.0	2.0	3.87		LX4_3401	Lynx 4
WST-21-0967	219.5	221.8	2.3	9.91		TLX_3161	Triple Lynx
including	220.1	220.6	0.5	45.4		TLX_3161	Triple Lynx
WST-21-0970	466.4	468.4	2.0	9.06		LX4_3430	Lynx 4
including	468.1	468.4	0.3	57.5		LX4_3430	Lynx 4
	476.0	478.3	2.3	6.34		LX4_3444	Lynx 4
including	476.7	477.0	0.3	22.2		LX4_3444	Lynx 4
WST-21-0978A	315.4	317.6	2.2	20.4		TLX_3131	Triple Lynx
including	316.2	316.6	0.4	98.4		TLX_3131	Triple Lynx
WST-21-0981	178.7	181.1	2.4	20.9		TLX_3161	Triple Lynx
including	178.7	179.0	0.3	65.7		TLX_3161	Triple Lynx
WST-21-0991	328.0	330.0	2.0	40.5	35.8	LHW_3212	Lynx HW
including	328.5	329.2	0.7	114	100	LHW_3212	Lynx HW
WST-21-0994	181.3	183.4	2.1	116	40.7	TLX_3184	Triple Lynx
including	181.9	182.6	0.7	325	100	TLX_3184	Triple Lynx
WST-21-0995	25.7	27.8	2.1	5.57		TLX_3161	Triple Lynx
	30.9	33.0	2.1	7.46		TLX_3161	Triple Lynx
WST-21-0996A	194.6	200.3	5.7	6.65		TLX_3164	Triple Lynx
including	198.8	199.1	0.3	47.7		TLX_3164	Triple Lynx
	225.0	231.0	6.0	4.10		TLX_3169	Triple Lynx
	381.0	383.0	2.0	4.18		TLX_3191	Triple Lynx
including	381.3	381.7	0.4	20.2		TLX_3191	Triple Lynx
WST-21-0997	555.0	557.2	2.2	9.24		LX4_3404	Lynx 4
WST-22-1000	147.3	155.5	8.2	8.26		TLX_3161	Triple Lynx
including	150.3	150.8	0.5	44.8		TLX_3161	Triple Lynx
WST-22-1002	250.0	252.0	2.0	20.7		LHW_3224	Lynx HW
including	251.0	252.0	1.0	41.4		LHW_3224	Lynx HW
	268.0	270.0	2.0	3.63		LHW_3224	Lynx HW
WST-22-1007	199.4	201.7	2.3	9.11		TLX_3161	Triple Lynx
including	199.8	200.2	0.4	29.4		TLX_3161	Triple Lynx

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below. LX4 = Lynx 4, LHW = Lynx Hanging Wall, LXM = Lynx Main, LSW = Lynx Southwest and TLX = Triple Lynx.

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-21-2381-W3	919.0	921.0	2.0	4.28		TLX	Triple Lynx
	959.8	962.7	2.9	12.9		TLX	Triple Lynx
including	961.5	961.9	0.4	51.0		TLX	Triple Lynx
	997.0	1002.6	5.6	23.9		TLX_3158	Triple Lynx
including	997.0	997.4	0.4	50.6		TLX_3158	Triple Lynx
OSK-W-21-2540-W5	1134.0	1136.0	2.0	22.8		TLX	Triple Lynx
including	1134.0	1135.1	1.1	41.3		TLX	Triple Lynx
OSK-W-21-2601-W1	1004.6	1010.0	5.4	187	71.8	TLX_3158	Triple Lynx
including	1005.4	1007.8	2.4	330	100
and	1008.3	1008.6	0.3	325	100
OSK-W-21-2647	1364.0	1366.5	2.5	16.6		TLX_3172	Triple Lynx
including	1365.0	1365.6	0.6	62.4		TLX_3172	Triple Lynx
WST-21-0927	588.0	593.5	5.5	4.60		LX4	Lynx 4
including	588.0	588.7	0.7	25.6		LX4	Lynx 4
	650.3	661.0	10.7	5.79		LX4	Lynx 4
including	651.0	651.7	0.7	21.7		LX4	Lynx 4
WST-21-0970	448.9	451.4	2.5	17.4		LX4	Lynx 4
including	449.9	450.5	0.6	65.0		LX4	Lynx 4
WST-21-0992	242.1	244.2	2.1	11.8		LXM	Lynx
including	242.1	243.0	0.9	25.4		LXM	Lynx
WST-21-0996A	359.0	362.1	3.1	4.21		TLX	Triple Lynx

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below., LXM = Lynx Main, LX4 = Lynx 4 and TLX = Triple Lynx.

Drill hole location

Hole No.	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-21-1949-W16	105	-57	1014	453440	5435479	401	3825
OSK-W-21-2287-W12	116	-53	1302	453607	5435714	404	4075
OSK-W-21-2381-W3	134	-53	1392	453620	5435790	402	4125
OSK-W-21-2540-W5	117	-60	1311	453465	5435640	410	3925
OSK-W-21-2564-W1	132	-50	1152	452960	5435539	419	3425
OSK-W-21-2601-W1	125	-61	1235	453425	5435657	413	3900
OSK-W-21-2605	112	-55	1401	453552	5435669	408	4025
OSK-W-21-2605-W1	112	-55	1380	453552	5435669	408	4025
OSK-W-21-2613-W1	114	-53	1152	452981	5435549	420	3450
OSK-W-21-2647	100	-61	1215	453525	5435704	405	4000
WST-21-0689A	161	-64	397	453356	5435272	16	3650
WST-21-0713	165	4	40	453359	5435194	84	3625
WST-21-0877	158	-60	490	453105	5435065	231	3325
WST-21-0907	130	-40	701	453375	5435297	-26	3675
WST-21-0927	146	-48	751	453321	5435235	54	3600
WST-21-0929B	115	-46	771	453506	5435327	-90	3800
WST-21-0933A	131	-52	733	453222	5435121	135	3450
WST-21-0934	119	-39	583	453507	5435332	-47	3800
WST-21-0948	136	-31	583	453374	5435296	-26	3675
WST-21-0956	134	-60	301	453508	5435328	-7	3800
WST-21-0961	163	-56	390	453507	5435327	-7	3800
WST-21-0964	127	-38	684	453374	5435297	-26	3675
WST-21-0967	160	-60	271	453506	5435327	-7	3800
WST-21-0970	117	-34	519	453507	5435333	-47	3800
WST-21-0978A	146	-49	702	453508	5435327	-7	3800
WST-21-0981	174	-51	258	453358	5435296	-149	3675
WST-21-0991	134	-29	391	453461	5435326	32	3775
WST-21-0992	120	-34	499	453507	5435333	-47	3800
WST-21-0994	197	-38	231	453357	5435296	-148	3675
WST-21-0995	149	-39	148	453440	5435223	-159	3700
WST-21-0996A	143	-45	427	453358	5435297	-149	3675
WST-21-0997	119	-45	640	453506	5435326	-90	3800
WST-22-1000	139	-45	447	453359	5435297	-149	3675
WST-22-1002	122	-36	341	453507	5435332	-48	3800
WST-22-1007	142	-36	183	453345	5435313	-67	3650

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

Quality Control and Reporting Protocols

About the Windfall Gold Deposit

About Osisko Mining Inc.

Cautionary Note Regarding Forward-Looking Information

CONTACT INFORMATION:

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

OSISKO ANNOUNCES MOU WITH THE CREE FIRST NATION OF WASWANIPI TO TRANSPORT HYDROELECTRIC POWER TO WINDFALL

Posted on February 28, 2022November 8, 2023 by lboivin

(Toronto, February 28, 2022) Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to announce that it has entered into a memorandum of understanding (“MOU”) with the Cree First Nation of Waswanipi (the “CFNW”) whereby the CFNW will transport hydroelectric power to the Windfall project.

The CFNW will finance, build, own and operate a 120kV transmission line that will transport hydroelectricity to the Windfall project and surrounding area. As an end user, Osisko will pay transportation fees to the CFNW. The MOU outlines the principal terms of the agreement between Osisko and the CFNW which will ensure delivery of hydroelectricity to Osisko’s Windfall project for a nominal period of 18 years, with further extensions over the life of the Windfall mill.

The MOU solidifies the partnership approach between Osisko and the CFNW to natural resource development. Additionally, using hydroelectric power through the final stages of exploration and throughout the construction and operations phases will reduce greenhouse gas emissions by reducing the Windfall project’s dependency on fossil fuels.

CEO and Chairman of Osisko John Burzynski stated: “Osisko is proud to enter into this MOU with the Cree First Nation of Waswanipi, historically a new approach with respect to conducting business on Eeyou Istchee/James-Bay territory. The hydroelectric power transportation MOU is aligned with Osisko’s vision for sustainable development of natural resources, and with the CFNW’s vision of sustainable infrastructure within their traditional territory.

Chief Marcel Happyjack of the Cree First Nation of Waswanipi stated: “Osisko has consulted and worked with us as rightsholders since their acquisition of Windfall in August 2015. Their sustainable development approach is highlighted by the success of Miyuukaa Corp., our socio-economic development entity. This ownership opportunity is the culmination of years of mutual respect and collaboration. We are writing a new chapter in sustainable infrastructure development within the Eeyou Istchee/James Bay territory.”

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 2,500 square kilometres).

Cautionary Statements

This news release contains “forward-looking information” within the meaning of applicable Canadian securities legislation based on expectations, estimates and projections as at the date of this news release. Forward-looking information involves risks, uncertainties and other factors that could cause actual events, results, performance, prospects and opportunities to differ materially from those expressed or implied by such forward-looking information. Forward-looking information in this news release includes, but is not limited to the ability of Osisko to complete the negotiation and enter into final and additional documentation in relation to the provision or electricity on terms acceptable to it; the ability of CFNW to finance, build, own and operate the power line; objectives, goals or future plans; statements regarding development and the provision of supplies to support development. Factors that could cause actual results to differ materially from such forward-looking information include, but are not limited to, successful negotiation of documents; capital and operating costs varying significantly from estimates; delays in obtaining or failures to obtain required governmental, environmental or other project approvals; uncertainties relating to the availability and costs of financing needed in the future; changes in equity markets; inflation; fluctuations in commodity prices; delays in the development of projects; the other risks involved in the mineral exploration and development industry; and those risks set out in Osisko’s public disclosure record on SEDAR (www.sedar.com) under Osisko’s issuer profile. Although Osisko believes that the assumptions and factors used in preparing the forward-looking information in this news release are reasonable, undue reliance should not be placed on such information, which only applies as of the date of this news release, and no assurance can be given that such events will occur in the disclosed time frames or at all. Osisko disclaims any intention or obligation to update or revise any forward-looking information, whether as a result of new information, future events or otherwise, other than as required by law.

CONTACTS INFORMATION:

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

John Kitchen

Miyuukaa Corp.

Director and Chief Executive Officer

Telephone (819) 856-7273

OSISKO WINDFALL DRILLING CONTINUES TO INTERCEPT HIGH GRADE

Posted on February 24, 2022November 8, 2023 by lboivin

449 g/t Au over 2.3 metres in Lynx

(Toronto, February 24, 2022) 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 128 intercepts in 54 drill holes (6 from surface, 48 from underground) and 20 wedges. The infill intercepts are located inside defined January 2022 mineral resource estimate (“MRE”) blocks (see Osisko news release dated January 10, 2022). The expansion intercepts are located outside the January 2022 MRE blocks and either expand resource wireframes or are in a defined zone or corridor but do not yet correlate to a specific wireframe.

Osisko Chief Executive Officer John Burzynski commented: “Today’s drill results reinforce Windfall’s strong upside. We continue to be successful with our expansion drilling as illustrated by four new intercepts which expand Triple Lynx wireframe 3172 100 meters to the east as well as our headline hole from the Lynx hanging wall area. Infill drilling is continuing to intercept grade and width where anticipated, with the purpose of converting inferred blocks to the measured and indicated categories in support of the feasibility study to be completed later this year.”

Selected high-grade intercepts include: 449 g/t Au over 2.3 metres in WST-21-0935; 56.5 g/t Au over 6.9 metres in OSK-W-21-1949-W13; 52.7 g/t Au over 6.5 metres in OSK-W-21-1963-W10; 124 g/t Au over 2.6 metres in OSK-W-21-2601 and 21.8 g/t Au over 8.9 metres in OSK-W-21-2540-W7. Maps showing hole locations and full analytical results are available at www.osiskomining.com. Maps: Long Section_Infill EN-20220224, Long Section_Expan EN-20220224, PR_EN_20220224_Surface, PR_EN_20220224_UG.

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-21-1871-W1	498.4	500.4	2.0	13.1		CA2_2225	Caribou
including	499.0	499.4	0.4	65.3		CA2_2225	Caribou
OSK-W-21-1949-W10	1073.0	1075.6	2.6	42.0	35.2	LX4_3430	Lynx 4
including	1073.8	1074.7	0.9	120	100	LX4_3430	Lynx 4
OSK-W-21-1949-W13	1081.5	1088.4	6.9	56.5	37.7	LX4_3404	Lynx 4
including	1081.5	1082.2	0.7	284	100	LX4_3404	Lynx 4
OSK-W-21-1949-W15	1095.5	1100.6	5.1	25.3	14.0	LX4_3404	Lynx 4
including	1096.5	1097.0	0.5	216	100	LX4_3404	Lynx 4
OSK-W-21-1949-W16	650.0	656.0	6.0	4.20		LXM_3353	Lynx
including	653.7	654.0	0.3	16.2		LXM_3353	Lynx
	737.6	742.3	4.7	24.1		LXM_3345	Lynx
including	738.1	739.0	0.9	71.3		LXM_3345	Lynx
OSK-W-21-1963-W10	1317.7	1324.2	6.5	52.7	40.1	LX4_3449	Lynx 4
including	1320.1	1321.1	1.0	182	100	LX4_3449	Lynx 4
OSK-W-21-2512-W3	667.4	669.4	2.0	8.09		UDD_4128	Underdog
including	668.3	668.6	0.3	17.5		UDD_4128	Underdog
	748.0	750.0	2.0	4.74		UDD_4104	Underdog
including	748.0	748.4	0.4	22.0		UDD_4104	Underdog
	774.0	776.1	2.1	9.36		UDD_4106	Underdog
including	775.7	776.1	0.4	47.0		UDD_4106	Underdog
OSK-W-21-2531-W3	815.0	817.0	2.0	25.4		UDD_4135	Underdog
	820.3	826.0	5.7	9.27		UDD_4121	Underdog
including	820.3	820.8	0.5	51.4		UDD_4121	Underdog
OSK-W-21-2544-W1	769.6	776.3	6.7	14.7		TLX_3171	Triple Lynx
including	771.7	772.0	0.3	55.0
and	772.0	772.5	0.5	69.4
OSK-W-21-2544-W3	767.3	770.4	3.1	16.7		TLX_3171	Triple Lynx
including	768.0	768.7	0.7	52.2		TLX_3171	Triple Lynx
OSK-W-21-2578	585.8	588.0	2.2	7.90		UDD_4128	Underdog
including	587.0	587.3	0.3	33.5		UDD_4128	Underdog
OSK-W-21-2640-W1	649.2	652.0	2.8	4.85		CA2_2262	Caribou
OSK-W-21-2646	1046.4	1054.3	7.9	5.66		TLX_3158	Triple Lynx
including	1047.1	1048.0	0.9	13.8		TLX_3158	Triple Lynx
WST-21-0708	617.2	619.5	2.3	8.56		LX4_3448	Lynx 4
including	619.2	619.5	0.3	63.6		LX4_3448	Lynx 4
WST-21-0878	184.4	186.5	2.1	15.7		TLX_3161	Triple Lynx
including	186.2	186.5	0.3	62.6		TLX_3161	Triple Lynx
	190.0	192.1	2.1	20.8		TLX_3161	Triple Lynx
including	191.6	192.1	0.5	87.3		TLX_3161	Triple Lynx
WST-21-0879	367.0	369.1	2.1	7.16		TLX_3167	Triple Lynx
WST-21-0881A	297.6	301.7	4.1	12.3	11.5	LSW_3556	Lynx SW
including	299.0	299.3	0.3	111	100	LSW_3556	Lynx SW
WST-21-0883	283.7	286.0	2.3	6.96		LSW_3500	Lynx SW
including	284.8	285.2	0.4	37.8		LSW_3500	Lynx SW
WST-21-0894B	305.2	307.4	2.2	42.0	24.7	LSW_3501	Lynx SW
including	306.1	306.5	0.4	195	100	LSW_3501	Lynx SW
WST-21-0896	521.7	523.9	2.2	6.87		LX4_3450	Lynx 4
including	522.7	523.0	0.3	49.2		LX4_3450	Lynx 4
WST-21-0897A	345.6	351.1	5.5	6.72		TLX_3131	Triple Lynx
including	350.3	351.1	0.8	22.5		TLX_3131	Triple Lynx
	522.0	524.4	2.4	4.06		LX4_3403	Lynx 4
including	522.0	522.4	0.4	20.7		LX4_3403	Lynx 4
	545.0	547.0	2.0	16.9		LX4_3104	Lynx 4
	660.0	662.0	2.0	49.1	26.6	LX4_3448	Lynx 4
including	660.8	661.1	0.3	250	100	LX4_3448	Lynx 4
WST-21-0905C	323.0	325.0	2.0	27.9		TLX_3166	Triple Lynx
	464.7	466.8	2.1	7.18		LX4_3450	Lynx 4
including	464.7	465.1	0.4	21.9		LX4_3450	Lynx 4
WST-21-0908C	529.5	531.7	2.2	30.3	19.0	LX4_3404	Lynx 4
including	530.0	530.4	0.4	163	100	LX4_3404	Lynx 4
	554.3	557.6	3.3	21.5	18.5	LX4_3430	Lynx 4
including	554.3	554.8	0.5	120	100	LX4_3430	Lynx 4
WST-21-0911	546.7	549.0	2.3	10.3		LX4_3430	Lynx 4
including	547.6	547.9	0.3	71.1		LX4_3430	Lynx 4
WST-21-0912	497.0	499.0	2.0	6.09		LX4_3450	Lynx 4
including	497.4	498.0	0.6	19.8		LX4_3450	Lynx 4
WST-21-0914	313.9	315.9	2.0	4.68		LSW_3556	Lynx SW
WST-21-0919	366.3	368.6	2.3	8.97		TLX_3167	Triple Lynx
including	368.0	368.6	0.6	33.6		TLX_3167	Triple Lynx
	425.6	427.8	2.2	8.84		TLX_3165	Triple Lynx
including	426.0	426.8	0.8	23.7		TLX_3165	Triple Lynx
WST-21-0924A	44.9	47.0	2.1	16.7		LXM_3303	Lynx
including	45.4	45.9	0.5	67.1		LXM_3303	Lynx
	64.0	66.1	2.1	42.8	24.6	LXM_3336	Lynx
including	64.0	64.5	0.5	177	100	LXM_3336	Lynx
WST-21-0927	512.0	514.0	2.0	10.6		LX4_3450	Lynx 4
including	512.6	513.1	0.5	35.0		LX4_3450	Lynx 4
	720.7	725.0	4.3	20.7		LX4_3412	Lynx 4
including	723.0	724.0	1.0	50.9		LX4_3412	Lynx 4
WST-21-0928	264.4	266.8	2.4	9.03		TLX_3161	Triple Lynx
WST-21-0931	313.3	315.3	2.0	27.4		TLX_3131	Triple Lynx
	527.0	529.0	2.0	13.3		LX4_3450	Lynx 4
including	527.7	528.0	0.3	67.6		LX4_3450	Lynx 4
WST-21-0932	204.8	207.8	3.0	49.9	36.8	LHW_3207	Lynx HW
including	207.1	207.8	0.7	156	100	LHW_3207	Lynx HW
WST-21-0933A	712.4	716.4	4.0	10.0		LX4_3412	Lynx 4
WST-21-0935	160.7	164.6	3.9	11.4		LXM_3388	Lynx
including	160.7	161.5	0.8	47.6		LXM_3388	Lynx
WST-21-0936A	338.3	340.5	2.2	4.80		TLX_3133	Triple Lynx
including	339.6	340.5	0.9	11.3		TLX_3133	Triple Lynx
	436.5	439.5	3.0	3.96		TLX_3165	Triple Lynx
WST-21-0937	96.0	98.2	2.2	5.40		LXM_3371	Lynx
including	97.1	97.5	0.4	29.0		LXM_3371	Lynx
WST-21-0943	302.8	305.0	2.2	7.80		TLX_3153	Triple Lynx
including	303.7	304.2	0.5	18.2		TLX_3153	Triple Lynx
WST-21-0946	326.0	330.1	4.1	20.4		TLX_3131	Triple Lynx
including	329.6	330.1	0.5	75.2		TLX_3131	Triple Lynx
WST-21-0948	454.9	457.0	2.1	5.64		LX4_3416	Lynx 4
WST-21-0957B	260.2	263.0	2.8	6.71		LHW_3203	Lynx HW
including	261.0	261.3	0.3	19.6
and	261.7	262.0	0.3	14.4
	276.0	281.0	5.0	4.51		LHW_3215	Lynx HW
including	280.0	281.0	1.0	11.1		LHW_3215	Lynx HW
WST-21-0958A	518.6	520.6	2.0	20.1		LX4_3450	Lynx 4
including	518.6	519.3	0.7	57.3		LX4_3450	Lynx 4
WST-21-0960	535.0	537.0	2.0	3.85		LX4_3404	Lynx 4
including	536.2	537.0	0.8	8.84		LX4_3404	Lynx 4
	563.7	565.8	2.1	11.6		LX4_3430	Lynx 4
including	564.6	565.2	0.6	40.1		LX4_3430	Lynx 4
	570.4	572.4	2.0	11.7		LX4_3430	Lynx 4
including	571.0	571.6	0.6	37.3		LX4_3430	Lynx 4
WST-21-0962	80.8	83.0	2.2	6.54		LXM_3307	Lynx
including	81.5	81.8	0.3	47.4		LXM_3307	Lynx
	466.0	468.0	2.0	10.7		LX4_3450	Lynx 4
including	466.6	466.9	0.3	59.3		LX4_3450	Lynx 4
WST-21-0963	168.5	170.6	2.1	83.7	47.4	LXM_3388	Lynx
including	169.4	170.0	0.6	227	100	LXM_3388	Lynx
	468.1	470.1	2.0	10.7		LX4_3430	Lynx 4
including	469.0	469.5	0.5	25.5		LX4_3430	Lynx 4
WST-21-0964	336.0	338.0	2.0	9.93		TLX_3131	Triple Lynx
WST-21-0965A	315.0	317.0	2.0	6.74		TLX_3131	Triple Lynx
WST-21-0968	194.2	196.2	2.0	4.64		TLX_3161	Triple Lynx
	217.0	219.0	2.0	4.21		TLX_3169	Triple Lynx
WST-21-0970	173.3	175.3	2.0	19.0		LXM_3388	Lynx
including	173.3	173.7	0.4	94.2		LXM_3388	Lynx
	261.4	263.4	2.0	11.8		LHW_3224	Lynx HW
including	261.4	261.9	0.5	39.2		LHW_3224	Lynx HW
WST-21-0971	58.5	61.0	2.5	5.56		LXM_3339	Lynx
	338.2	341.3	3.1	4.19		TLX_3166	Triple Lynx
WST-21-0979	201.0	203.0	2.0	15.6	15.3	TLX_3184	Triple Lynx
including	202.7	203.0	0.3	103	100	TLX_3184	Triple Lynx
	231.4	235.6	4.2	5.40		TLX_3161	Triple Lynx
including	231.4	231.7	0.3	48.5		TLX_3161	Triple Lynx
WST-21-0980	180.5	182.6	2.1	10.1		TLX_3161	Triple Lynx
including	180.5	180.9	0.4	52.6		TLX_3161	Triple Lynx
	329.0	331.0	2.0	4.37		TLX_3131	Triple Lynx
including	329.8	330.2	0.4	15.9		TLX_3131	Triple Lynx
WST-21-0981	167.0	169.0	2.0	4.51		TLX_3161	Triple Lynx
WST-21-0983	205.0	207.2	2.2	4.21		TLX_3154	Triple Lynx
including	206.8	207.2	0.4	19.3		TLX_3154	Triple Lynx
	249.0	251.0	2.0	3.63		TLX_3161	Triple Lynx
WST-21-0987	46.3	48.8	2.5	6.65		TLX_3161	Triple Lynx
WST-21-0993	153.2	155.7	2.5	3.63		TLX_3184	Triple Lynx
including	155.4	155.7	0.3	8.11		TLX_3184	Triple Lynx
	177.5	180.7	3.2	4.62		TLX_3161	Triple Lynx
including	177.5	177.9	0.4	15.1
and	180.0	180.7	0.7	11.5
	215.0	217.0	2.0	4.71		TLX_3175	Triple Lynx
including	216.5	217.0	0.5	11.3		TLX_3175	Triple Lynx

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below. CA2 = Caribou, LX4 = Lynx 4, LHW = Lynx Hanging Wall, LXM = Lynx Main, LSW = Lynx Southwest, TLX = Triple Lynx, and UDD = Underdog.

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-21-1871-W1	864.0	866.0	2.0	16.2		UDD	Underdog
including	864.4	865.0	0.6	53.4		UDD	Underdog
OSK-W-21-1871-W3	849.0	851.5	2.5	5.51		UDD	Underdog
including	851.0	851.5	0.5	20.5		UDD	Underdog
OSK-W-21-2512-W2	539.9	543.0	3.1	3.66		CAE	Caribou
OSK-W-21-2540-W7	963.7	972.6	8.9	21.8	19.4	TLX_3158	Triple Lynx
including	966.1	966.6	0.5	142	100	TLX_3158	Triple Lynx
	1111.0	1113.0	2.0	8.46		TLX	Triple Lynx
	1125.0	1127.4	2.4	3.55		TLX	Triple Lynx
OSK-W-21-2540-W9	923.0	925.2	2.2	10.9		TLX	Triple Lynx
including	923.8	924.3	0.5	45.4		TLX	Triple Lynx
	965.5	967.8	2.3	24.8	21.8	TLX_3158	Triple Lynx
including	967.5	967.8	0.3	123	100	TLX_3158	Triple Lynx
OSK-W-21-2540-W10	990.3	992.7	2.4	17.6		TLX_3158	Triple Lynx
	1132.0	1134.0	2.0	5.57		TLX_3172	Triple Lynx
	1144.0	1146.0	2.0	7.90		TLX_3172	Triple Lynx
OSK-W-21-2540-W11	992.7	995.0	2.3	23.9		TLX_3158	Triple Lynx
including	993.1	994.1	1.0	53.3		TLX_3158	Triple Lynx
OSK-W-21-2587-W2	527.5	529.6	2.1	3.59		LXM	Lynx
including	527.5	527.9	0.4	13.6		LXM	Lynx
OSK-W-21-2601	992.7	995.3	2.6	124	38.5	TLX_3158	Triple Lynx
including	994.2	994.9	0.7	418	100	TLX_3158	Triple Lynx
OSK-W-21-2601-W2	883.9	886.0	2.1	10.5		TLX	Triple Lynx
including	883.9	884.5	0.6	36.6		TLX	Triple Lynx
	978.3	981.1	2.8	32.6		TLX_3158	Triple Lynx
OSK-W-21-2601-W3	944.0	946.0	2.0	13.0		TLX_3158	Triple Lynx
OSK-W-21-2635	297.0	299.0	2.0	13.9		CAE	Caribou
including	297.0	298.0	1.0	27.7		CAE	Caribou
OSK-W-21-2636	712.0	714.3	2.3	3.52		UDD	Underdog
including	714.0	714.3	0.3	12.4		UDD	Underdog
OSK-W-21-2637	569.0	571.0	2.0	31.3		CAE	Caribou
including	570.2	571.0	0.8	77.8		CAE	Caribou
WST-21-0708	239.0	241.3	2.3	11.0		TLX	Triple Lynx
including	240.0	240.7	0.7	35.8		TLX	Triple Lynx
WST-21-0754	150.6	153.8	3.2	6.83		LXM	Lynx
including	152.5	152.9	0.4	21.4		LXM	Lynx
WST-21-0913	150.9	153.0	2.1	15.9		LXM	Lynx
including	150.9	151.7	0.8	41.6		LXM	Lynx
WST-21-0914	384.5	387.0	2.5	6.59		LSW	Lynx SW
including	385.2	385.8	0.6	26.8		LSW	Lynx SW
WST-21-0927	398.0	400.0	2.0	4.78		TLX	Triple Lynx
WST-21-0929B	193.6	196.0	2.4	30.3		TLX	Triple Lynx
including	194.7	195.2	0.5	69.5		TLX	Triple Lynx
WST-21-0931	456.1	459.1	3.0	9.87		TLX	Triple Lynx
WST-21-0935	265.7	268.0	2.3	449	17.5	LHW	Lynx HW
including	266.6	267.0	0.4	2580	100	LHW	Lynx HW
WST-21-0936A	398.0	400.1	2.1	3.99		TLX	Triple Lynx
WST-21-0943	153.8	156.0	2.2	4.87		LXM	Lynx
including	154.1	154.7	0.6	16.6		LXM	Lynx
WST-21-0944	258.0	260.2	2.2	4.05		LHW	Lynx HW
WST-21-0960	402.2	404.5	2.3	5.59		LX4	Lynx 4
including	402.2	402.6	0.4	21.5		LX4	Lynx 4
WST-21-0962	187.0	189.0	2.0	14.5		LXM	Lynx
including	188.0	188.4	0.4	52.1		LXM	Lynx
	402.0	404.0	2.0	18.9		TLX	Triple Lynx
	419.0	421.2	2.2	8.19		TLX	Triple Lynx
including	419.9	420.4	0.5	35.1		TLX	Triple Lynx
	639.0	641.3	2.3	6.98		LX4	Lynx 4
WST-21-0964	312.3	314.7	2.4	7.87		TLX	Triple Lynx
including	313.7	314.2	0.5	33.9		TLX	Triple Lynx
WST-21-0966	371.0	373.1	2.1	3.45		LHW_3233	Lynx HW
including	372.5	372.8	0.3	21.4		LHW_3233	Lynx HW
WST-21-0969	331.0	333.0	2.0	4.65		TLX	Triple Lynx
including	331.0	332.0	1.0	9.21		TLX	Triple Lynx
	480.0	482.1	2.1	4.36		LX4	Lynx 4
	536.8	539.0	2.2	11.5		LX4	Lynx 4
including	536.8	537.8	1.0	25.0		LX4	Lynx 4
WST-21-0971	467.0	469.0	2.0	7.40		LX4	Lynx 4
including	467.0	467.9	0.9	16.3		LX4	Lynx 4
	479.0	482.0	3.0	4.82		LX4	Lynx 4
WST-21-0981	192.4	195.3	2.9	7.36		TLX	Triple Lynx
including	192.4	193.0	0.6	24.2		TLX	Triple Lynx
WST-21-0993	160.0	162.1	2.1	12.7		TLX	Triple Lynx
including	161.1	162.1	1.0	26.1		TLX	Triple Lynx

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below. CAE = Caribou, LHW = Lynx Hanging Wall, LSW = Lynx Southwest, LXM = Lynx Main, LX4 = Lynx 4, TLX = Triple Lynx, and UDD = Underdog.

Drill hole location

Hole No.	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-21-1871-W1	331	-56	1119	452496	5434397	402	2475
OSK-W-21-1871-W3	331	-56	906	452496	5434397	402	2475
OSK-W-21-1949-W10	105	-57	1317	453440	5435479	401	3825
OSK-W-21-1949-W13	105	-57	1212	453440	5435479	401	3825
OSK-W-21-1949-W15	105	-57	1305	453440	5435479	401	3825
OSK-W-21-1949-W16	105	-57	1014	453440	5435479	401	3825
OSK-W-21-1963-W10	123	-58	1451	453761	5435816	401	4275
OSK-W-21-2512-W2	331	-54	834	452448	5434465	400	2475
OSK-W-21-2512-W3	331	-54	819	452448	5434465	400	2475
OSK-W-21-2531-W3	344	-62	1329	452566	5434415	403	2550
OSK-W-21-2540-W7	117	-60	1152	453465	5435640	410	3925
OSK-W-21-2540-W9	117	-60	1349	453465	5435640	410	3925
OSK-W-21-2540-W10	117	-60	1181	453465	5435640	410	3925
OSK-W-21-2540-W11	117	-60	1028	453465	5435640	410	3925
OSK-W-21-2544-W1	128	-50	1140	452960	5435539	419	3425
OSK-W-21-2544-W3	128	-50	810	452960	5435539	419	3425
OSK-W-21-2578	350	-53	942	452178	5434397	399	2200
OSK-W-21-2587-W2	127	-59	1167	453350	5435673	418	3850
OSK-W-21-2601	125	-61	1500	453425	5435657	413	3900
OSK-W-21-2601-W2	125	-61	1500	453425	5435657	413	3900
OSK-W-21-2601-W3	125	-61	1305	453425	5435657	413	3900
OSK-W-21-2635	327	-56	708	452684	5434475	402	2675
OSK-W-21-2636	337	-52	801	452499	5434619	403	2575
OSK-W-21-2637	140	-59	747	452768	5435312	406	3150
OSK-W-21-2640-W1	336	-58	737	452683	5434351	402	2625
OSK-W-21-2646	109	-58	1272	453326	5435648	413	3800
WST-21-0708	134	-40	670	453374	5435296	-26	3675
WST-21-0754	151	-44	220	453356	5435272	16	3650
WST-21-0878	128	-40	711	453375	5435297	-26	3675
WST-21-0879	139	-44	724	453258	5435209	96	3525
WST-21-0881A	147	-57	457	453105	5435065	231	3325
WST-21-0883	126	-59	393	453105	5435065	231	3325
WST-21-0894B	132	-52	417	452955	5435004	253	3175
WST-21-0896	140	-47	741	453258	5435209	96	3525
WST-21-0897A	127	-42	699	453375	5435297	-26	3675
WST-21-0905C	141	-52	511	453221	5435121	135	3450
WST-21-0908C	122	-44	664	453506	5435326	-90	3800
WST-21-0911	121	-44	635	453507	5435332	-48	3800
WST-21-0912	141	-41	640	453258	5435209	96	3525
WST-21-0913	138	-49	594	453322	5435236	54	3600
WST-21-0914	148	-59	502	453105	5435066	231	3325
WST-21-0919	141	-46	597	453257	5435209	96	3525
WST-21-0924A	151	-29	138	453314	5435164	124	3550
WST-21-0927	146	-48	751	453321	5435235	54	3600
WST-21-0928	154	-70	391	453507	5435327	-7	3800
WST-21-0929B	115	-46	771	453506	5435327	-90	3800
WST-21-0931	144	-50	603	453321	5435235	54	3600
WST-21-0932	136	-26	360	453461	5435326	32	3775
WST-21-0933A	131	-52	733	453222	5435121	135	3450
WST-21-0935	132	-10	283	453462	5435326	33	3775
WST-21-0936A	137	-48	570	453257	5435209	96	3525
WST-21-0937	147	-25	127	453314	5435164	124	3550
WST-21-0943	151	-55	388	453507	5435327	-7	3800
WST-21-0944	116	-8	325	453462	5435326	33	3775
WST-21-0946	168	-51	403	453507	5435327	-7	3800
WST-21-0948	136	-31	583	453374	5435296	-26	3675
WST-21-0957B	120	-9	306	453462	5435326	33	3775
WST-21-0958A	141	-49	579	453321	5435235	54	3600
WST-21-0960	116	-42	600	453506	5435327	-90	3800
WST-21-0962	132	-49	685	453222	5435122	135	3450
WST-21-0963	121	-36	543	453507	5435333	-47	3800
WST-21-0964	127	-38	684	453374	5435297	-26	3675
WST-21-0965A	141	-49	344	453507	5435327	-7	3800
WST-21-0966	145	-28	390	453461	5435326	32	3775
WST-21-0968	183	-48	243	453358	5435296	-148	3675
WST-21-0969	133	-52	639	453321	5435235	54	3600
WST-21-0970	117	-34	519	453507	5435333	-47	3800
WST-21-0971	139	-62	615	453222	5435121	135	3450
WST-21-0979	178	-55	255	453358	5435296	-149	3675
WST-21-0980	131	-38	681	453374	5435297	-26	3675
WST-21-0981	174	-51	258	453358	5435296	-149	3675
WST-21-0983	176	-59	279	453358	5435297	-149	3675
WST-21-0987	154	-4	73	453440	5435223	-157	3700
WST-21-0993	191	-28	231	453357	5435296	-148	3675

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.

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.

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

The Windfall gold deposit is located between Val-d’Or and Chibougamau in the Abitibi region of Québec, Canada. The Mineral Resource Estimate (“MRE“) defined by Osisko, as disclosed in the news release dated February 17, 2021 is supported by the technical report entitled “Preliminary Economic Assessment Update for the Windfall Project” dated April 26, 2021 (that includes Windfall Mineral Resource Estimate 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.

Cautionary Note Regarding Forward-Looking Information

CONTACT INFORMATION:

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

OSISKO TO PROCEED WITH INDEPENDENT DEVELOPMENT OF WINDFALL PROJECT

Posted on February 16, 2022November 8, 2023 by lboivin

Joint-Venture Discussions with Northern Star Resources Conclude

Toronto, Ontario (February 16, 2022) – Osisko Mining Inc. (TSX:OSK) (“Osisko“) provides the update today, that further to its announcement of November 30, 2021, Osisko and Northern Star Resources Limited (“Northern Star“) have agreed to terminate joint venture negotiations with respect to Osisko’s Windfall Project.

Osisko has determined that development of the Windfall Project on an independent basis would be optimal for the shareholders of Osisko. While joint venture negotiations have concluded, Osisko maintains a mutually beneficial relationship with Northern Star as an important debt holder through its $154 million in a convertible senior unsecured debenture due December 1, 2025 (the “Debentures“) with interest at a rate of 4.75% per annum.

The exclusivity period for negotiation of the joint venture and associated special rights of conversion into a joint venture interest under certain circumstances expire on March 1, 2022.

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 the Urban Barry area and nearby Quévillon area (over 2,500 square kilometres).

Cautionary Note Regarding Forward-Looking Information

This news release contains “forward-looking information” within the meaning of applicable Canadian securities legislation based on expectations, estimates and projections as at the date of this news release. Forward-looking information involves risks, uncertainties and other factors that could cause actual events, results, performance, prospects and opportunities to differ materially from those expressed or implied by such forward-looking information. Forward-looking information in this news release includes, but is not limited to, the use of proceeds from the sale of Debentures; the ability of Osisko to complete the negotiation and enter into the earn-in and joint venture agreement on terms acceptable to it; the ability of Osisko to fund the repayment of the Debentures; objectives, goals or future plans; statements regarding exploration results and exploration plans. Factors that could cause actual results to differ materially from such forward-looking information include, but are not limited to, successful negotiation of documents; capital and operating costs varying significantly from estimates; the preliminary nature of metallurgical test results; delays in obtaining or failures to obtain required governmental, environmental or other project approvals; uncertainties relating to the availability and costs of financing needed in the future; changes in equity markets; inflation; fluctuations in commodity prices; delays in the development of projects; the other risks involved in the mineral exploration and development industry; and those risks set out in Osisko’s public disclosure record on SEDAR (www.sedar.com) under Osisko’s issuer profile. Although Osisko believes that the assumptions and factors used in preparing the forward-looking information in this news release are reasonable, undue reliance should not be placed on such information, which only applies as of the date of this news release, and no assurance can be given that such events will occur in the disclosed time frames or at all. Osisko disclaims any intention or obligation to update or revise any forward-looking information, whether as a result of new information, future events or otherwise, other than as required by law.

For further information on Osisko please contact:

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

OSISKO FILES TECHNICAL REPORT FOR WINDFALL MINERAL RESOURCE ESTIMATE UPDATE

Posted on February 10, 2022November 8, 2023 by lboivin

(Toronto, February 10, 2022) 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 February 10, 2022 (effective date of October 20, 2021) 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
President & Chief Executive Officer
Telephone (416) 363-8653

OSISKO INFILL DRILLING OUTLINES LYNX 600 BULK

Posted on February 8, 2022November 8, 2023 by lboivin

5000 tonnes Averaging 36.7 g/t Au (Capped Grade)

350% Higher Than 2022 MRE M&I Resource Average Grade

(Toronto, February 8, 2022) Osisko Mining Inc. (OSK:TSX “Osisko” or the “Corporation”) is pleased to provide an update from the ongoing exploration program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

New analytical results from 12.5 metre infill drilling targeting the Lynx 600 level bulk sample (the “Triple Lynx” bulk sample) area are presented below. The infill program was completed in support of a revised block model for the sample, predicting approximately 5,000 tonnes with an average capped grade of 36.7 g/t Au in the planned sample area. This capped grade is 350% higher than the average grade of the recently published Windfall mineral resource estimate (“MRE”) (see Osisko news release dated January 10, 2022) measured and indicated average grade of 10.5 g/t Au and demonstrates the potential for areas of the deposit to host a significant number of additional ounces.

The infill intercepts are located inside defined January 2022 MRE blocks but were not included in the MRE (as they were received subsequent to the closure of the data base). Results include 25 intercepts in 22 drill holes (1 from surface, 21 from underground) and 3 wedges.

Chief Executive Officer John Burzynski commented: “We are highly encouraged with these initial results from the planned Lynx 600 bulk sample area. We expect to extract the sample in the coming month, and to process it during the second quarter. These infill results continue to follow a general trend we have seen at Windfall, where detailed work in high-grade areas results in excellent and often positive confirmation of the high-grade zones. Our expectation is that we may again see a positive reconciliation once the sample is processed, based on the results of the first two Windfall bulk samples which returned 126% and 189% positive reconciliations (see respective Osisko news releases dated December 18, 2018 and December 11, 2019.)”

The bulk sample is situated in wireframe 3161 of the January 2022 MRE. The revised block model (informed by the 12.5 metre spaced infill drill program) used the same parameters as the January 2022 MRE, including the same capping methods. The revised block model predicts 4,977 tonnes averaging 36.7 g/t Au and estimates 5,872 ounces of gold from the sample area.

The planned sample is located 600 metres below surface (level 0600). Access is planned via levels 0580 and 0600 which are accessible from the exploration ramp. Mining will begin with 65 metres of longitudinal development (4 metres high x 4 to 6 metres wide) along the mineralized corridor on each level. The 20 metre high long-hole stope (floor to floor) between levels is estimated to be 12.5 metres long x 6.5 metres wide. The proposed volume of approximately 4,977 tonnes to be mined includes the stope and the corresponding undercut segment of 12.5 metres of conventional development from level 0600.

Mineralization in the sample area is characterized by a two to seven metre wide zone of alteration with trace to 10% pyrite stingers, sericite and silica +/- fuchsite, which crosscuts gabbro and felsic dykes. Grey quartz veins with pyrite veinlets, trace sphalerite and local visible gold are associated with high-grade areas.

New and previously announced analytical results are shown in Table 1 and hole locations in Table 2. Maps with hole locations and full analytical results are available at www.osiskomining.com. Maps: Bulk TLX-3161 Long section EN Final.

Table 1: Lynx 600 Bulk Sample 12.5m Infill Drilling Results

Drill Hole	From (m)	To (m)	Length (m)	Au (g/t) uncut	Au (g/t) Cut to 100g/t
OSK-W-19-2133*	796.3	798.8	2.5	37.0
OSK-W-20-2133-W3*	791.2	793.5	2.3	193	41.7
OSK-W-20-2133-W4*	798.8	802.4	3.6	40.4
OSK-W-19-2197-W1*	784.5	789.6	5.1	72.0	23.6
WST-20-0613*	237.8	240.3	2.5	696	43.4
WST-21-0614*	233.1	236.8	3.7	39.5	29.6
WST-21-0619A*	214.0	216.0	2.0	20.0
WST-21-0750*	232.6	234.8	2.2	248	55.6
WST-21-0751*	222.7	225.7	3.0	7.04
WST-21-0770	–	–	–	nsa
WST-21-0811A*	209.0	211.0	2.0	73.4	55.0
WST-21-0950A	54.1	56.1	2.0	50.0	39.3
WST-21-0951	61.0	63.0	2.0	180	75.2
WST-21-0952	53.5	55.7	2.2	153	63.3
WST-21-0953B	52.6	54.8	2.2	2.99
WST-21-0954	47.1	53.8	6.7	50.1	26.2
WST-21-0955	47.1	51.0	3.9	61.6	23.6
WST-21-0972	46.5	49.7	3.2	82.3	23.3
WST-21-0973	45.9	48.0	2.1	36.8
WST-21-0976	43.6	48.6	5.0	5.24
WST-21-0977	42.8	45.8	3.0	64.4	26.4
WST-21-0984	41.8	46.7	4.9	45.3	38.3
WST-21-0985	33.8	36.6	2.8	11.2
WST-21-0986	45.8	47.8	2.0	362	34.8
WST-21-0995	37.1	41.1	4.0	22.7	21.5

Notes: True widths are estimated at 77 – 100% of the reported core length interval. See “Quality Control and Reporting Protocols” below.

nsa = no significant assays. * Denotes results published in previous news releases.

Table 2: Lynx 600 Bulk Sample 12.5m Infill Hole Locations

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-19-2133	118	-49	1055	453080	5435531	417	3525
OSK-W-20-2133-W3	118	-49	965	453080	5435531	417	3525
OSK-W-20-2133-W4	118	-49	987	453080	5435531	417	3525
OSK-W-19-2197-W1	122	-48	1104	453087	5435526	417	3550
WST-20-0613	123	-55	442	453358	5435273	16	3650
WST-21-0614	131	-59	427	453357	5435273	16	3650
WST-21-0619A	174	-61	249	453507	5435327	-7	3800
WST-21-0750	124	-54	280	453357	5435273	16	3650
WST-21-0751	133	-56	331	453357	5435272	16	3650
WST-21-0770	129	-43	835	453374	5435296	-26	3675
WST-21-0811A	125	-44	708	453375	5435296	-26	3675
WST-21-0950A	107	-40	82	453442	5435225	-158	3700
WST-21-0951	106	-24	79	453442	5435224	-158	3700
WST-21-0952	114	-32	75	453442	5435224	-157	3700
WST-21-0953B	118	-23	73	453442	5435224	-157	3700
WST-21-0954	117	-43	76	453441	5435224	-158	3700
WST-21-0955	128	-36	73	453442	5435224	-158	3700
WST-21-0972	129	-48	67	453441	5435224	-158	3700
WST-21-0973	134	-19	67	453441	5435223	-157	3700
WST-21-0976	145	-54	103	453440	5435224	-159	3700
WST-21-0977	164	-49	61	453441	5435223	-158	3700
WST-21-0984	186	-49	72	453440	5435223	-158	3700
WST-21-0985	161	-34	64	453440	5435223	-158	3700
WST-21-0986	160	-17	73	453439	5435223	-158	3700
WST-21-0995	149	-39	148	453440	5435223	-159	3700

Qualified Person

The scientific and technical content of this news release has been reviewed, prepared and approved by Judith St-Laurent, P.Geo (OGQ #1023)., B.Sc., Director of Resource Estimation at Osisko, who is a “qualified person” as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”). The infill block model in the bulk sample area from the Lynx 3161 zone of the Windfall Gold Deposit, with an effective date of February 3, 2022, was prepared by Judith St-Laurent, P.Geo (OGQ #1023)., B.Sc., Director of Resource Estimation at Osisko, who is a “qualified person” within the meaning of NI 43-101. The scientific and technical content in this press release has been reviewed and approved by Mr. Mathieu Savard, P.Geo (OGQ #510), President of Osisko Mining, 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 Lake Gold Deposit

The Windfall gold deposit is located between Val-d’Or and Chibougamau in the Abitibi greenstone belt region of Québec, Canada. The Mineral Resource Estimate (“MRE”) defined by Osisko, as disclosed in the news release dated January 10, 2022 and assuming a cut-off grade of 3.50 g/t Au, comprises 565,000 tonnes at 11.6 g/t Au (210,000 ounces) in the measured mineral resource category, 8,907,000 tonnes at 10.5 g/t Au (2,994,000 ounces) in the indicated mineral resource category and 13,035,000 tonnes at 8.6 g/t Au (3,585,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the January 10, 2022 news release, certain of which are described in the January 10, 2022 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 January 10, 2022. 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

For further information please contact:

John Burzynski

Chief Executive Officer

Telephone: (416) 363-8653

DRILLING INTERSECTS WIDE HIGH-GRADE AT OSISKO’S WINDFALL

Posted on January 18, 2022November 8, 2023 by lboivin

77.6 g/t Au Over 17.3 Metres; and 45.8 g/t Au Over 11.0 Metres in Lynx 4

124 g/t Au Over 8.0 Metres in Triple Lynx

(Toronto, January 18, 2022) 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 that have not been included in the recently released mineral resource estimate (“MRE”) (see Osisko news release dated January 10, 2022) are presented below, and include 94 intercepts in 28 drill holes (9 from surface, 19 from underground) and 25 wedges. The infill intercepts are located inside defined January 2022 MRE blocks. The expansion intercepts are located outside the January 2022 MRE blocks and either expand MRE wireframes or are in a defined zone or corridor but do not yet correlate to a specific MRE wireframe.

Osisko Chief Executive Officer John Burzynski commented: “Today’s results serve as a reminder that Windfall continues to grow in size, underscored by some of these new wide high-grade hits as the deposit opens up in the heart of the Lynx system. By virtue of the current resource, Windfall is the largest high-grade million ounce plus deposit ever discovered in Québec, and it has been steadily moving up the global list of top high-grade underground gold deposits. There is nothing quite like Windfall in Canada, or even globally.”

Selected high-grade intercepts include: 482 g/t Au over 5.7 metres and 380 g/t Au over 3.2 metres in OSK-W-21-1432-W10; 77.6 g/t Au over 17.3 metres in OSK-W-21-1949-W14; 124 g/t Au over 8.0 metres in OSK-W-21-2587-W2; 45.8 g/t Au over 11.0 metres and 143 g/t Au over 3.4 metres in WST-21-0707; 87.9 g/t Au over 3.2 metres in OSK-W-21-2465-W5; 83.0 g/t Au over 3.0 metres in WST-21-0895A, 37.0 g/t Au over 6.4 metres in OSK-W-21-2613 and 28.1 g/t Au over 6.0 metres in OSK-W-21-2644. Maps showing hole locations and full analytical results are available at www.osiskomining.com. Maps: Long Section_All zones Infill EN 20220118, Long Section_All zones Expan EN 20220118, PR_EN_20220118_Surface, PR_EN_20220118_UG

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-21-1432-W10	957.3	960.5	3.2	380	44.9	LX4_3460	Lynx 4
including	958.0	958.4	0.4	1240	100
and	959.7	960.1	0.4	1640	100
OSK-W-21-1432-W11	955.3	957.3	2.0	10.8		LX4_3433	Lynx 4
including	956.4	956.8	0.4	45.0		LX4_3433	Lynx 4
OSK-W-21-1432-W12	988.3	991.4	3.1	16.7		LX4_3460	Lynx 4
including	991.0	991.4	0.4	95.9		LX4_3460	Lynx 4
OSK-W-21-1871-W1	949.0	951.0	2.0	5.81		UDD_4501	Underdog
including	949.6	950.0	0.4	27.7		UDD_4501	Underdog
OSK-W-21-1871-W2	507.0	509.0	2.0	4.50		CA2_2225	Caribou
including	508.0	508.7	0.7	12.4		CA2_2225	Caribou
OSK-W-21-1949-W12	1047.9	1050.0	2.1	3.57		LX4_3430	Lynx 4
OSK-W-21-1949-W14	749.0	751.0	2.0	47.8	30.1	LXM_3345	Lynx
including	749.0	749.5	0.5	171	100	LXM_3345	Lynx
	1163.0	1180.3	17.3	77.6	27.2	LX4_3463	Lynx 4
including	1169.8	1170.2	0.4	704	100
and	1172.8	1173.2	0.4	481	100
and	1173.6	1174.0	0.4	1195	100
OSK-W-21-2479-W11	976.5	978.5	2.0	14.3		UDD_4910	Underdog
including	976.9	977.5	0.6	44.6		UDD_4910	Underdog
OSK-W-21-2531-W4	590.3	592.4	2.1	9.37		CA2_2266	Caribou
	595.0	597.0	2.0	7.06		CA2_2266	Caribou
	618.7	620.7	2.0	3.86		CA2_2257	Caribou
including	619.7	620.3	0.6	9.46		CA2_2257	Caribou
	777.2	781.0	3.8	13.8		UDD_4112	Underdog
including	777.2	777.7	0.5	81.5		UDD_4112	Underdog
OSK-W-21-2544-W1	781.4	783.4	2.0	3.68		TLX_3171	Triple Lynx
	976.1	981.0	4.9	8.30		TLX_3195	Triple Lynx
including	976.1	976.4	0.3	50.0		TLX_3195	Triple Lynx
OSK-W-21-2544-W2	802.0	804.3	2.3	20.0		TLX_3159	Triple Lynx
including	802.0	802.6	0.6	59.4		TLX_3159	Triple Lynx
	909.8	911.8	2.0	10.7		TLX_3193	Triple Lynx
including	910.4	910.8	0.4	52.1		TLX_3193	Triple Lynx
	921.6	923.7	2.1	10.3		TLX_3194	Triple Lynx
including	922.4	922.7	0.3	71.6		TLX_3194	Triple Lynx
OSK-W-21-2544-W4	770.3	773.0	2.7	14.6		TLX_3171	Triple Lynx
including	771.0	771.7	0.7	44.0		TLX_3171	Triple Lynx
	776.0	780.0	4.0	8.74		TLX_3171	Triple Lynx
OSK-W-21-2587-W1	1119.0	1126.0	7.0	21.0		TLX_3172	Triple Lynx
including	1123.5	1124.0	0.5	99.1
and	1125.7	1126.0	0.3	67.8
OSK-W-21-2587-W2	1134.0	1142.0	8.0	124	36.9	TLX_3172	Triple Lynx
including	1136.7	1137.0	0.3	1685	100
and	1139.7	1140.4	0.7	371	100
OSK-W-21-2612-W1	396.0	398.0	2.0	4.50		Z27_1115	Zone 27
OSK-W-21-2613	911.0	913.0	2.0	6.35		TLX_3161	Triple Lynx
	944.1	950.5	6.4	37.0	33.1	TLX_3161	Triple Lynx
including	947.3	947.6	0.3	114	100
and	947.9	948.4	0.5	142	100
OSK-W-21-2618	60.0	62.2	2.2	13.9		WFN_7003	Windfall North
including	60.0	61.0	1.0	30.2		WFN_7003	Windfall North
OSK-W-21-2621-W1	629.3	633.0	3.7	13.7		UDD_4100	Underdog
including	629.3	629.7	0.4	31.9		UDD_4100	Underdog
and	632.0	633.0	1.0	31.5		UDD_4100	Underdog
OSK-W-21-2626	103.4	106.0	2.6	13.7		F11_6001	F-11
OSK-W-21-2635	555.8	558.0	2.2	3.98		CA2_2232	Caribou
OSK-W-21-2637	548.0	550.0	2.0	13.9		CAE_2559	Caribou
including	548.8	549.4	0.6	44.0		CAE_2559	Caribou
OSK-W-21-2641	131.8	133.8	2.0	25.6		F11_6009	F-11
including	132.6	133.2	0.6	64.0		F11_6009	F-11
OSK-W-21-2645	126.1	128.1	2.0	19.0		F11_6000	F-11
including	126.1	126.9	0.8	45.1		F11_6000	F-11
	133.0	135.0	2.0	10.1		F11_6000	F-11
WST-21-0649	710.4	714.4	4.0	27.3	26.5	LX4_3427	Lynx 4
including	710.4	710.8	0.4	109	100	LX4_3427	Lynx 4
WST-21-0707	180.0	183.4	3.4	143	67.8	LXM_3388	Lynx
including	182.2	183.4	1.2	255	100	LXM_3388	Lynx
	499.5	510.5	11.0	45.8	38.4	LX4_3430	Lynx 4
including	499.5	500.0	0.5	99.2
and	507.0	507.8	0.8	202	100
	532.1	537.4	5.3	8.43		LX4_3434	Lynx 4
including	535.7	536.1	0.4	17.7
and	536.7	537.4	0.7	29.1
WST-21-0861	87.0	89.5	2.5	24.3	24.2	LXM_3339	Lynx
including	88.9	89.5	0.6	101	100	LXM_3339	Lynx
WST-21-0864A	257.5	259.5	2.0	4.94		LHW_3203	Lynx HW
including	258.2	258.8	0.6	15.0		LHW_3203	Lynx HW
WST-21-0878	503.9	506.2	2.3	4.30		LX4_3401	Lynx 4
including	505.5	505.8	0.3	27.6		LX4_3401	Lynx 4
	614.0	616.4	2.4	25.1		LX4_3448	Lynx 4
including	614.0	614.6	0.6	99.1		LX4_3448	Lynx 4
WST-21-0883	341.4	343.5	2.1	5.88		TLX_3166	Triple Lynx
including	342.2	342.5	0.3	27.7		TLX_3166	Triple Lynx
WST-21-0895A	480.3	482.8	2.5	26.6		LX4_3404	Lynx 4
including	481.4	481.8	0.4	75.1		LX4_3404	Lynx 4
	519.3	522.3	3.0	83.0	44.0	LX4_3440	Lynx 4
including	520.0	520.7	0.7	254	100	LX4_3440	Lynx 4
WST-21-0900	291.6	294.4	2.8	18.9		LHW_3216	Lynx HW
including	294.0	294.4	0.4	84.8		LHW_3216	Lynx HW
WST-21-0905C	52.3	54.5	2.2	13.7		LXM_3339	Lynx
including	52.9	53.4	0.5	52.2		LXM_3339	Lynx
	65.6	69.0	3.4	12.7		LXM_3311	Lynx
including	66.5	67.0	0.5	34.8		LXM_3311	Lynx
	211.0	213.0	2.0	11.2		LSW_3504	Lynx SW
WST-21-0907	543.2	545.4	2.2	5.02		LX4_3401	Lynx 4
WST-21-0908B	195.0	197.0	2.0	15.6		TLX_3121	Triple Lynx
including	195.3	195.7	0.4	62.9		TLX_3121	Triple Lynx
WST-21-0911	175.7	177.9	2.2	10.5		LXM_3388	Lynx
including	177.3	177.9	0.6	21.3		LXM_3388	Lynx
	526.9	529.0	2.1	4.41		LX4_3404	Lynx 4
including	527.3	527.6	0.3	25.4		LX4_3404	Lynx 4
	530.0	532.0	2.0	3.68		LX4_3404	Lynx 4
WST-21-0913	526.0	528.0	2.0	11.0		LX4_3450	Lynx 4
including	527.1	527.4	0.3	68.5		LX4_3450	Lynx 4
WST-21-0916A	526.8	529.0	2.2	11.9		LX4_3450	Lynx 4
including	526.8	527.2	0.4	57.4		LX4_3450	Lynx 4
WST-21-0918	345.0	347.0	2.0	26.4	25.9	TLX_3131	Triple Lynx
including	346.0	346.5	0.5	102	100	TLX_3131	Triple Lynx
	516.7	518.7	2.0	30.7		LX4_3401	Lynx 4
including	517.8	518.3	0.5	72.5		LX4_3401	Lynx 4
WST-21-0932	155.0	157.0	2.0	10.9		LXM_3388	Lynx
including	155.8	156.1	0.3	47.1		LXM_3388	Lynx
	182.0	184.0	2.0	3.89		LHW_3206	Lynx HW

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below. CAE and CA2 = Caribou, LX4 = Lynx 4, LHW = Lynx Hanging Wall, LXM = Lynx Main, LSW = Lynx Southwest, TLX = Triple Lynx, UDD = Underdog, WNF = Windfall North, F11 = F11 Zone, and Z27 = Zone 27.

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-21-1432-W10	851.5	853.5	2.0	4.70		LX4	Lynx 4
	915.7	921.4	5.7	482	27.5	LX4	Lynx 4
including	915.7	916.2	0.5	975	100
and	917.6	917.9	0.3	2540	100
and	920.8	921.1	0.3	4330	100
OSK-W-21-1871-W1	941.6	946.7	5.1	8.53		UDD	Underdog
including	941.6	942.1	0.5	23.2
and	944.8	945.1	0.3	40.9
OSK-W-21-1871-W3	722.3	724.4	2.1	11.2		UDD	Underdog
including	723.7	724.4	0.7	23.2		UDD	Underdog
OSK-W-21-1949-W12	1018.8	1021.0	2.2	19.0		LX4	Lynx 4
	1144.2	1146.5	2.3	10.2		LX4	Lynx 4
including	1144.2	1145.0	0.8	29.2		LX4	Lynx 4
OSK-W-21-1949-W14	1060.7	1062.7	2.0	6.93		LX4	Lynx 4
including	1061.5	1062.0	0.5	23.2		LX4	Lynx 4
	1068.7	1070.7	2.0	5.92		LX4	Lynx 4
	1137.8	1140.4	2.6	4.01		LX4	Lynx 4
including	1139.0	1139.3	0.3	9.74		LX4	Lynx 4
	1185.2	1188.9	3.7	8.84		LX4	Lynx 4
including	1185.2	1185.5	0.3	27.9
and	1188.0	1188.9	0.9	20.4
	1203.5	1214.0	10.5	6.26		LX4	Lynx 4
including	1213.6	1214.0	0.4	26.4		LX4	Lynx 4
	1217.0	1219.0	2.0	4.14		LX4	Lynx 4
	1228.8	1230.9	2.1	4.81		LX4	Lynx 4
OSK-W-21-2287-W10	1121.5	1124.0	2.5	13.1		LX4	Lynx 4
including	1121.5	1122.5	1.0	32.6		LX4	Lynx 4
OSK-W-21-2369-W3	962.0	964.0	2.0	32.4	30.5	LX4	Lynx 4
including	962.0	962.6	0.6	106	100	LX4	Lynx 4
OSK-W-21-2381-W2	1267.2	1269.4	2.2	3.82		LX4	Lynx 4
including	1268.7	1269.4	0.7	10.3		LX4	Lynx 4
OSK-W-21-2465-W5	824.3	827.5	3.2	87.9	71.8	TLX	Triple Lynx
including	824.3	825.0	0.7	146	100
including	825.5	825.9	0.4	131	100
including	825.9	826.9	1.0	108	100
OSK-W-21-2465-W6	765.5	767.7	2.2	15.1		TLX	Triple Lynx
including	765.5	766.0	0.5	60.0		TLX	Triple Lynx
OSK-W-21-2540-W4	1106.9	1109.0	2.1	48.4	14.7	TLX	Triple Lynx
including	1106.9	1107.2	0.3	336	100	TLX	Triple Lynx
OSK-W-21-2601-W1	1042.0	1044.0	2.0	4.04		TLX	Triple Lynx
OSK-W-21-2621-W1	668.0	670.0	2.0	4.02		UDD	Underdog
OSK-W-21-2629	903.3	907.2	3.9	20.1		LX4	Lynx 4
including	903.3	904.3	1.0	64.2		LX4	Lynx 4
OSK-W-21-2637	561.3	564.0	2.7	28.0		Caribou	Caribou
OSK-W-21-2640-W1	635.6	637.6	2.0	3.86		Caribou	Caribou
OSK-W-21-2644	504.0	506.0	2.0	6.53		Caribou	Caribou
	509.0	511.0	2.0	4.21		Caribou	Caribou
including	509.0	509.7	0.7	10.3		Caribou	Caribou
	656.0	658.1	2.1	5.69		Caribou	Caribou
	662.0	668.0	6.0	28.1		Caribou	Caribou
including	664.0	665.0	1.0	92.6		Caribou	Caribou
WST-21-0784	335.8	337.8	2.0	6.02		TLX	Triple Lynx
WST-21-0885B	326.3	331.0	4.7	24.9	19.1	LSW	Lynx SW
including	327.0	327.5	0.5	155	100
and	330.6	331.0	0.4	55.3
WST-21-0907	186.0	188.0	2.0	18.3		TLX	Triple Lynx
including	186.4	186.8	0.4	91.2		TLX	Triple Lynx
	549.0	551.0	2.0	13.6		LX4	Lynx 4
including	549.6	550.0	0.4	66.1		LX4	Lynx 4
WST-21-0909	231.1	233.3	2.2	57.5	51.2	TLX	Triple Lynx
including	232.1	232.5	0.4	135	100	TLX	Triple Lynx
WST-21-0911	564.2	568.8	4.6	7.90		LX4	Lynx 4
WST-21-0918	646.0	648.0	2.0	11.6		LX4	Lynx 4

Notes: True widths are estimated at 55 – 80% of the reported core length interval. See “Quality Control and Reporting Protocols” below. LSW = Lynx Southwest, LXM = Lynx Main, LX4 = Lynx 4, TLX = Triple Lynx, UDD = Underdog.

Drill hole location

Hole Number	Azimuth (°)	Dip (°)	Length (m)	UTM E	UTM N	Elevation	Section
OSK-W-21-1432-W10	132	-55	1062	453811	5435779	400	4300
OSK-W-21-1432-W11	132	-55	1149	453811	5435779	400	4300
OSK-W-21-1432-W12	132	-55	1113	453811	5435779	400	4300
OSK-W-21-1871-W1	331	-56	1119	452496	5434397	402	2475
OSK-W-21-1871-W2	331	-56	915	452496	5434397	402	2475
OSK-W-21-1871-W3	331	-56	906	452496	5434397	402	2475
OSK-W-21-1949-W12	105	-57	1301	453440	5435479	401	3825
OSK-W-21-1949-W14	105	-57	1332	453440	5435479	401	3825
OSK-W-21-2287-W10	116	-53	1311	453607	5435714	404	4075
OSK-W-21-2369-W3	130	-56	1415	453424	5435566	410	3850
OSK-W-21-2381-W2	134	-53	887	453620	5435790	402	4125
OSK-W-21-2465-W5	123	-61	1062	453398	5435556	413	3825
OSK-W-21-2465-W6	123	-61	993	453398	5435556	413	3825
OSK-W-21-2479-W11	344	-55	1005	452315	5434420	399	2325
OSK-W-21-2531-W4	344	-62	1203	452566	5434415	403	2550
OSK-W-21-2540-W4	117	-60	1297	453465	5435640	410	3925
OSK-W-21-2544-W1	128	-50	1140	452960	5435539	419	3425
OSK-W-21-2544-W2	128	-50	1044	452960	5435539	419	3425
OSK-W-21-2544-W4	128	-50	858	452960	5435539	419	3425
OSK-W-21-2587-W1	127	-59	1176	453350	5435673	418	3850
OSK-W-21-2587-W2	127	-59	1167	453350	5435673	418	3850
OSK-W-21-2601-W1	125	-61	1235	453425	5435657	413	3900
OSK-W-21-2612-W1	333	-51	690	452391	5434638	402	2500
OSK-W-21-2613	114	-53	1092	452981	5435549	420	3450
OSK-W-21-2618	330	-56	248	452279	5435162	411	2650
OSK-W-21-2621-W1	344	-53	765	452272	5434396	399	2275
OSK-W-21-2626	153	-47	156	452299	5435823	406	3000
OSK-W-21-2629	114	-57	1011	453622	5435635	405	4050
OSK-W-21-2635	327	-56	708	452684	5434475	402	2675
OSK-W-21-2637	140	-59	747	452768	5435312	406	3150
OSK-W-21-2640-W1	336	-58	737	452683	5434351	402	2625
OSK-W-21-2641	177	-46	165	452436	5435884	407	3150
OSK-W-21-2644	346	-55	693	452566	5434415	403	2550
OSK-W-21-2645	157	-48	189	452409	5435902	406	3125
WST-21-0649	136	-47	790	453258	5435211	98	3525
WST-21-0707	118	-41	633	453507	5435332	-48	3800
WST-21-0784	132	-66	361	453507	5435327	-7	3800
WST-21-0861	139	-64	307	453106	5435066	231	3325
WST-21-0864A	121	-1	292	453463	5435327	33	3775
WST-21-0878	128	-40	711	453375	5435297	-26	3675
WST-21-0883	126	-59	393	453105	5435065	231	3325
WST-21-0885B	145	-53	377	452954	5435003	253	3175
WST-21-0895A	123	-42	635	453507	5435332	-48	3800
WST-21-0900	122	-13	316	453462	5435326	33	3775
WST-21-0905C	141	-52	511	453221	5435121	134	3450
WST-21-0907	130	-40	701	453374	5435296	-26	3675
WST-21-0908B	118	-43	198	453506	5435326	-90	3800
WST-21-0909	151	-59	426	453507	5435328	-7	3800
WST-21-0911	121	-44	635	453507	5435332	-48	3800
WST-21-0913	138	-49	594	453322	5435236	54	3600
WST-21-0916A	146	-52	586	453321	5435235	54	3600
WST-21-0918	130	-40	663	453374	5435296	-26	3675
WST-21-0932	136	-26	360	453462	5435326	32	3775

Caribou Zone

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.

Underdog

Windfall North

Mineralization is hosted in sheared andesites and most commonly occurs in gold-bearing quartz veins with trace to 10% pyrite, traces of sphalerite and chalcopyrite, and local visible gold. Mineralization is hosted in a silica-carbonate-sericite alteration envelope and is constrained within shear zones with pervasive sericite-carbonate ± fuchsite ± silica alteration.

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-Zones

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.

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 Estimate (“MRE“) defined by Osisko, as disclosed in the news release dated January 10, 2022 and assuming a cut-off grade of 3.50 g/t Au, comprises 565,000 tonnes at 11.6 g/t Au (210,000 ounces) in the measured mineral resource category, 8,907,000 tonnes at 10.5 g/t Au (2,994,000 ounces) in the indicated mineral resource category and 13,035,000 tonnes at 8.6 g/t Au (3,585,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the January 10, 2022 news release, certain of which are described in the January 10, 2022 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 January 10, 2022. 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 DELIVERS UPDATED WINDFALL MINERAL RESOURCE ESTIMATE

Posted on January 10, 2022November 8, 2023 by lboivin

3.2 Million Ounces Measured and Indicated Resource Averaging 10.5 g/t Au

3.6 Million Ounces Inferred Resource Averaging 8.6 g/t Au

(Toronto, January 10, 2022) Osisko Mining Inc. (OSK:TSX, “Osisko” or the “Corporation”) is pleased to provide the updated mineral resource estimate (“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 reflects the results of approximately 1.7 million metres of drilling, with 1.5 million metres completed by Osisko since October 2015, and includes all drilling completed as of September 2021 and all analytical results received as of October 20, 2021.

An additional 70,000 metres of infill and expansion drilling has been completed since September 2021. This additional drilling and outstanding analytical results, together with ongoing surface and underground drilling, will be integrated into the database for the pending feasibility study expected to be completed in Q4 2022. Map of MRE & Upside potential.

HIGHLIGHTS

3.2 M oz measured & indicated (“M&I”) resource avg. 10.5 g/t Au
M&I resource increase of 73% with avg. grade increased by 9%
Lynx contains 60% of MRE total gold
Lynx resource: M&I 2.3 M oz avg. 12g/t Au; Inferred 1.8 M oz avg. 10.9 g/t Au
3.6 M oz inferred resource avg. 8.6 g/t Au, reflecting a grade increase of 8%
50% of the MRE is hosted in 30 wireframes
98% of MRE is located from surface to 1200 m vertical depth
Exploration ramp access currently at >600 m vertical depth in Lynx
Lynx 600 bulk sample (Triple Lynx at level 600) work in progress; prior Lynx 311 bulk sample returned 189% positive grade reconciliation (see Osisko news release dated December 11, 2019)
Strong open potential for expansion of high-grade zones in Lynx to the East and down plunge

Chief Executive Officer of Osisko John Burzynski commented: “The world-class Windfall deposit continues to impress with grade and scale. Infill drilling has again exceeded our expectations, with excellent conversion, and the M&I resource increasing by 73% with average gold grade moving past double digits to 10.5 g/t. This MRE forms a strong foundation for the upcoming feasibility study. We are confident that as we complete the remaining infill work in the coming months, the resource will continue to grow and we should again see incremental increase in what is already a strong average grade.”

Mr. Burzynski continued: “Windfall is an outstanding, well-defined deposit which still has demonstrable strong upside potential to grow. The consistent trend over the past five years of drilling, as we completed our extensive and detailed surface and underground work programs, has been steady growth of ounces and increasing high-grade. We are confident that Windfall will grow significantly in the future with continued work. We would like very much to thank our employees and contractors for their tremendous efforts to advance our project, our Cree First Nation hosts and partners, the local and provincial governments, and our stakeholders and shareholders for their strong support.”

The MRE sensitivity table (Table 1) shows the potential for additional resources through optimizing costs and cut-off grade which will be reviewed during feasibility work. Table 2 shows resources by main area of the Windfall deposit.

Table 1: Windfall Gold Deposit Mineral Resource Estimate Sensitivity Table⁽¹⁾

Cut-off (g/t Gold)	Measured + Indicated					Inferred
Cut-off (g/t Gold)	Tonnes (000 t)	Gold (g/t)	Ag (g/t)	Gold (000 oz)	Ag (000 oz)	Tonnes (000 t)	Gold (g/t)	Ag (g/t)	Gold (000 oz)	Ag (000 oz)
5.0	6,904	12.9	6.0	2,859	1,336	8,568	10.8	6.0	2,986	1,648
4.5	7,635	12.1	5.7	2,971	1,406	9,709	10.1	5.6	3,160	1,734
4.0	8,472	11.3	5.4	3,084	1,483	11,241	9.3	5.1	3,369	1,849
3.5	9,472	10.5	5.2	3,204	1,570	13,035	8.6	4.7	3,585	1,984
3.0	10,680	9.7	4.8	3,330	1,662	15,282	7.8	4.3	3,819	2,132
2.5	12,127	8.9	4.5	3,456	1,766	18,554	6.9	3.9	4,108	2,327

Note: ⁽¹⁾ MRE cut-off 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

Tonnes⁽¹⁾ (000 t)

Gold

(g/t)

(g/t)

Gold⁽¹⁾

(000 oz)

Ag⁽¹⁾

(000 oz)

Tonnes⁽¹⁾ (000 t)

Gold

(g/t)

(g/t)

Gold⁽¹⁾

(000 oz)

Ag⁽¹⁾

(000 oz)

Tonnes⁽¹⁾ (000 t)

Gold

(g/t)

(g/t)

Gold⁽¹⁾

(000 oz)

Ag⁽¹⁾

(000 oz)

Lynx⁽²⁾

565

11.6

7.2

210

131

5,430

12.0

5.4

2,096

944

5,052

10.9

7.1

1,777

1,147

Underdog

–

800

9.5

3.3

244

4,419

7.9

3.0

1,119

432

Main⁽³⁾

–

2,676

7.6

4.8

654

410

2,909

5.8

3.3

540

306

Triple 8

–

655

7.1

4.7

149

Total

565

11.6

7.2

210

131

8,907

10.5

5.0

2,994

1,439

13,035

8.6

4.7

3,585

1,984

Notes:⁽¹⁾ Values are rounded to nearest thousand which may cause apparent discrepancies.⁽²⁾Lynx area includes: Lynx Main, Lynx HW, Lynx SW, Lynx 4 and Triple Lynx. ⁽³⁾ Main area includes: Zone 27, Caribou 1&2, Caribou Extension, Bobcat, Mallard, Windfall Nord, and F-Zones. See Windfall Gold Deposit Mineral Resource Estimate notes further below.

This MRE reflects the results of 4,536 drill holes (1,722,097 metres of core) in the resource area, including 3,882 drill holes (1,539,984 metres of core) completed by Osisko from October 2015 to September 20, 2021 with assays up to October 20, 2021. The MRE (with an effective date of October 20, 2021) was prepared by Osisko, under the supervision of BBA Inc. 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. Lynx and Underdog mineralized lenses predominantly form an extensive anastomosed network of quartz-rich and pyrite-rich veins. The mineralization system is located near contacts between volcanic and pre-mineral intrusive rocks in Main and Lynx areas, and more specifically, within pre-mineral intrusive units in Underdog.

The MRE is 50% contained within 30 wireframes, and 75% contained within 98 wireframes. The MRE considers a total of 556 mineralized lenses 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).

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	1,600
Exchange Rate	USD/CAD	1.26
Mill Recovery	%	94.9
Payability	%	99.95
Sell Cost	USD/oz	5
Royalties (NSR)	%	2
Mining Cost	CAD/t milled	107
G&A Cost	CAD/t milled	32
Processing Cost	CAD/t milled	31
Transportation	CAD/t milled	2
Environment	CAD/t milled	12
Calculated Cut-off Grade	g/t Au	3.1
MRE Cut-off Grade	g/t Au	3.5

Windfall Gold Deposit Mineral Resource Estimate Notes

The independent qualified person for the 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 October 20, 2021.

The Windfall mineral resource estimate follows 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 October 20, 2021, the database comprises a total of 4,536 drill holes for 1,722,097 metres of drilling in the areal extent of the mineral resource estimate, of which 3,882 drill holes (1,539,984 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 556 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 lenses sharing similar mineralization characteristics. Cappings vary from 6 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 for most projects were produced using 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 vary between 2.73 and 2.93 and are mainly based on the densities of lithologies within the mineralized lenses.
The Windfall mineral resource estimate is categorized as measured, indicated and inferred mineral resource as follows:
1. The measured mineral resource category is manually defined and encloses areas where:
  1. drill spacing is less than 12.5 metres,
  2. blocks are informed by a minimum of four drill holes,

geological evidence is sufficient to confirm geological and grade continuity.

lenses in the area have been accessed by underground workings.

The indicated mineral resource category is manually defined and encloses areas where:
1. drill spacing is generally less than 25 metres,
2. blocks are informed by a minimum of two drill holes,

geological evidence is sufficient to assume geological and grade continuity.

The inferred mineral resource category is manually defined and encloses areas where:
1. drill spacing is less than 100 metres,
2. blocks are informed by a minimum of two drill holes,

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 1,600 USD/oz, exchange rate at 1.26 USD/CAD, 94.9% mill recovery; payability of 99.95%; selling cost at 5 USD/oz, 2% NSR royalties, mining cost at 107 CAD/t milled, G&A cost at 32 CAD/t milled, processing cost at 31 CAD/t, transportation cost at 2 CAD/t considering mill at site, and environment cost at 12 CAD/t. A cut-off grade of 3.5 g/t Au was selected over the calculated cut-off grade of 3.1 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 / 31.103475).
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 October 20, 2021, 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

About the Windfall Gold Deposit

The Windfall gold deposit is located between Val-d’Or and Chibougamau in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec, Canada. The mineral resource defined by Osisko, as disclosed in this news release and assuming a cut-off grade of 3.5 g/t Au, comprises 565,000 tonnes at 11.6 g/t Au (210,000 ounces) in the measured mineral resource category, 8,907,000 tonnes at 10.5 g/t Au (2,994,000 ounces) in the indicated mineral resource category and 13,035,000 tonnes at 8.6 g/t Au (3,585,000 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, and Underdog. Mineralization is generally comprised of sub-vertical lenses following intrusive porphyry contacts plunging to the northeast. The resources are defined from surface to a depth of 1,600 metres, including the Triple 8 (TP8) zone. The resources excluding TP8 are defined from surface to a depth of 1,200 metres. The deposit remains open along strike and at depth. Mineralization has been identified near 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 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 the Urban Barry area and nearby Quévillon area (over 2,600 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

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 MRE 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 MRE disclosed in this news release; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; upgrading a inferred mineral resource to a measured mineral resource or indicated mineral resource category; future exploration activities, including drilling, at the Windfall gold deposit; the growth potential of the Windfall deposit and management’s expectations relating thereto; the potential for expansion of high-grade zones in Lynx to the East and down plunge; expected grade and resource growth; the deposit remaining open along strike to the northeast and at depth; cut-off grade and sensitivity analysis; 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
Office Telephone (416) 363-8653

OSISKO RECAPS WINDFALL DRILL PROGRAM RESULTS WITH TOP 21 INTERCEPTS OF 2021

Posted on December 21, 2021November 8, 2023 by lboivin

(Toronto, December 21, 2021) Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Corporation”) is pleased to provide a recap of the 2021 drill program and the top 21 intercepts of the year from its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

The 2021 drill program at Windfall included over 360,000 metres in over 900 drill holes from surface and underground. The drilling focused on infill and expansion of the mineralized zones defined in the February 2021 mineral resource estimate (see Osisko news release dated February 17, 2021) with the objectives of converting inferred resources into the measured and indicated categories in support of the upcoming feasibility study, expanding known zones, and defining new zones.

This year’s top intercepts demonstrate once again the high-grade nature of the Lynx zones, with some of the best intervals of the project. However, Caribou zone ranks first overall this year with 3,979 g/t Au over 2.3 metres. The table below presents the “Top 21 intercepts” from this year’s drill program based on metal factor (grade*length). Location map: Long Section EN top21_2021.pdf

WINDFALL 2021 TOP 21 INTERCEPTS BY METAL FACTOR

Rank	Hole No.	From (m)	To (m)	Interval (m)	Au (g/t) uncut	*gmetres uncut**	Zone
1	OSK-W-21-2565	535.8	538.1	2.3	3979	9153	Caribou
2	OSK-W-21-2287-W1	1209.9	1212.4	2.5	2181	5452	LX4_3449
3	OSK-W-21-1432-W6	970.9	976.2	5.3	632	3347	LX4_3430
4	OSK-W-21-2287-W6	1259.2	1269.7	10.5	319	3346	LX4_3449
5	OSK-W-21-2549	421.1	423.8	2.7	1096	2960	Caribou
6	WST-21-0668	36.5	38.7	2.2	877	1930	Bobcat_2350
7	WST-20-0613	237.8	240.3	2.5	696	1740	TLX_3161
8	OSK-W-21-2587	1098.4	1101.1	2.7	576	1554	TLX_3170
9	OSK-W-21-1432-W11	929.3	938.1	8.8	163	1438	Lynx 4
10	OSK-W-21-2369-W3	672.8	676.3	3.5	369	1293	LXM_3304
11	WST-21-0814	83.1	87.5	4.4	293	1291	Z27_1101
12	WST-21-0833	278.0	280.4	2.4	512	1229	LHW_3201
13	OSK-W-20-2256-W7	881.0	891.5	10.5	108	1133	TLX_3161
14	WST-20-0632	123.8	125.9	2.1	507	1066	LXM_3334
15	OSK-W-21-2287-W1	1215.0	1217.2	2.2	403	887	LX4_3449
16	OSK-W-20-2252-W7	900.0	909.7	9.7	90.5	878	TLX_3161
17	OSK-W-20-1432-W2	959.5	962.0	2.5	342	855	Lynx_3437
18	WST-21-0823	165.2	167.4	2.2	388	854	LXM_3304
19	WST-21-0828	520.0	526.3	6.3	135	849	LX4_3440
20	OSK-W-21-2492-W2	783.6	785.7	2.1	385	808	LX4_3414
21	OSK-W-20-2313-W2	645.8	648.0	2.2	344	756	TLX_3196

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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 Estimate (“MRE“) defined by Osisko, as disclosed in the news release dated February 17, 2021 is supported by the technical report entitled “Preliminary Economic Assessment Update for the Windfall Project” dated April 26, 2021 (that includes Windfall Mineral Resource Estimate 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.

Cautionary Note Regarding Forward-Looking Information

CONTACT INFORMATION:

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

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Category: Windfall

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