Osisko Mining drills three m of 177 g/t Au at Windfall
2021-03-17 08:08 ET - News Release
Mr. John Burzynski reports
OSISKO EXPANSION DRILLING ADDS NEW HIGH GRADE AT LYNX
Osisko Mining Inc. has provided new analytical results from the continuing drill program at its 100-per-cent-owned Windfall gold project located in the Abitibi greenstone belt, Urban township, Eeyou Istchee James Bay, Quebec.
Drilling is currently focused on the Lynx deposit. Significant new analytical results presented below include 66 intercepts in 22 drill holes (5 from surface, 17 from underground) and 21 wedges. The intercepts are located outside the February 2021 mineral resource estimate ("MRE") (see Osisko news release dated February 17, 2021) and either expand resource wireframes or are located in a defined zone or corridor but do not yet correlate to a specific wireframe.
Osisko Chief Executive Officer John Burzynski commented: "Today's expansion results in Lynx and Triple Lynx continue to confirm the growth potential of these zones. The higher-grade intercept in OSK-W-20-2381-W1 extends Lynx 90 metres from the nearest MRE block and WST-20-0602 extends Triple Lynx 100 metres from the nearest MRE block".
Selected high-grade intercepts include: 177 g/t Au over 3.0 metres and 66.6 g/t Au over 2.0 metres in OSK-W-20-2381-W1; 43.4 g/t Au over 5.3 metres in WST-20-0602; 56.4 g/t Au over 3.2 metres in WST-20-0603; 52.1 g/t Au over 3.4 metres in WST-20-0611; 70.2 g/t Au over 2.2 metres in OSK-W-20-2313-W7; 57.2 g/t Au over 2.1 metres in OSK-W-20-2391; and 25.1 g/t Au over 4.8 metres in OSK-W-20-2252-W8. Maps showing hole locations and full analytical results are available at www.osiskomining.com
Expansion Drilling Hole No. From (m)To (m)Interval (m)Au (g/t) uncutAu (g/t) cut to 100 g/t Zone Corridor OSK-W-20-2170-W7 1029.6 1031.9 2.3 11.1 Triple LynxTriple Lynx including 1029.6 1030.0 0.4 59.7 OSK-W-20-2252-W10 1182.6 1184.8 2.2 3.89 Triple LynxTriple Lynx 1190.2 1192.4 2.2 13.8 Triple LynxTriple Lynx including 1191.2 1192.1 0.9 31.3 1204.3 1206.3 2.0 4.22 Triple LynxTriple Lynx OSK-W-20-2252-W8 975.2 980.0 4.8 25.1 22.6 Triple LynxTriple Lynx including 976.5 977.7 1.2 85.8 75.6 OSK-W-20-2271-W2 1133.5 1135.5 2.0 3.64 Lynx 4 Lynx including 1134.0 1134.5 0.5 14.5 OSK-W-20-2271-W5 1064.6 1067.4 2.8 4.74 Lynx 4 Lynx including 1064.6 1065.0 0.4 13.1 OSK-W-20-2280-W7 977.0 981.8 4.8 7.78 Triple LynxTriple Lynx including 977.0 977.4 0.4 30.4 OSK-W-20-2283-W2 951.0 953.0 2.0 3.94 Triple LynxTriple Lynx OSK-W-20-2287 1245.0 1247.0 2.0 3.51 Lynx 4 Lynx OSK-W-20-2292-W1 1131.8 1134.0 2.2 3.66 Triple LynxTriple Lynx including 1131.8 1132.1 0.3 23.5 OSK-W-20-2313-W7 993.0 995.2 2.2 70.2 14.4 Triple LynxTriple Lynx including 994.9 995.2 0.3 509 100 OSK-W-20-2313-W9 793.0 797.5 4.5 5.65 Triple LynxTriple Lynx including 796.5 797.5 1.0 13.4 OSK-W-20-2322-W1 1047.4 1049.7 2.3 3.69 Lynx 4 Lynx including 1047.4 1048.0 0.6 13.7 OSK-W-20-2328 898.2 900.5 2.3 3.64 Lynx 4 Lynx OSK-W-20-2363 578.0 582.0 4.0 6.19 Triple LynxTriple Lynx including 581.3 582.0 0.7 24.4 OSK-W-20-2363-W1 662.0 664.1 2.1 4.43 Triple LynxTriple Lynx OSK-W-20-2363-W2 751.0 753.5 2.5 5.90 Triple LynxTriple Lynx including 753.0 753.5 0.5 12.0 867.6 870.0 2.4 5.18 Triple LynxTriple Lynx including 867.6 868.0 0.4 27.7 887.0 889.0 2.0 3.75 Triple LynxTriple Lynx OSK-W-20-2363-W3 999.1 1001.6 2.5 4.52 Triple LynxTriple Lynx OSK-W-20-2371-W1 654.0 656.3 2.3 17.9 Triple LynxTriple Lynx including 655.2 655.8 0.6 60.8 717.0 719.0 2.0 5.97 Triple LynxTriple Lynx 937.0 939.0 2.0 3.68 Triple LynxTriple Lynx including 938.1 938.4 0.3 20.4 977.5 980.9 3.4 10.8 Triple LynxTriple Lynx including 977.5 977.8 0.3 70.1 OSK-W-20-2371-W2 815.0 817.0 2.0 3.60 Triple LynxTriple Lynx 1047.0 1049.0 2.0 4.04 Lynx 4 Lynx including 1047.4 1048.1 0.7 11.4 OSK-W-20-2375-W3 918.0 920.0 2.0 3.86 Lynx 4 Lynx OSK-W-20-2381-W1 1332.0 1335.0 3.0 177 38.2 Lynx 4 Lynx including 1332.0 1333.0 1.0 515 100 1364.5 1366.5 2.0 66.6 26.6 Lynx 4 Lynx including 1366.1 1366.5 0.4 300 100 OSK-W-20-2391 1183.3 1185.4 2.1 57.2 26.2 Triple LynxTriple Lynx including 1185.1 1185.4 0.3 317 100 1283.0 1285.1 2.1 9.73 Triple LynxTriple Lynx including 1283.7 1284.0 0.3 58.1 OSK-W-20-2391-W2 1380.0 1382.0 2.0 10.7 Triple LynxTriple Lynx including 1380.9 1381.2 0.3 65.3 1390.3 1394.7 4.4 21.2 Triple LynxTriple Lynx including 1392.8 1393.1 0.3 65.3 and 1393.9 1394.7 0.8 58.0 OSK-W-20-2394-W1 889.0 891.0 2.0 5.04 Triple LynxTriple Lynx OSK-W-20-2394-W3 1012.6 1015.0 2.4 33.5 Triple LynxTriple Lynx including 1013.2 1014.0 0.8 99.9 OSK-W-21-2445 445.0 447.0 2.0 10.3 Triple LynxTriple Lynx including 446.7 447.0 0.3 61.6 WST-20-0522 243.0 245.1 2.1 3.79 Lynx SW Lynx SW WST-20-0523A 297.0 299.0 2.0 3.83 Lynx SW Lynx SW WST-20-0524 238.7 241.0 2.3 3.60 Lynx SW Lynx SW including 239.6 240.0 0.4 16.9 WST-20-0548A 271.4 273.6 2.2 3.60 Triple LynxTriple Lynx including 272.1 272.8 0.7 10.9 WST-20-0554 357.4 359.4 2.0 6.43 Triple LynxTriple Lynx 424.0 426.2 2.2 3.77 Triple LynxTriple Lynx WST-20-0569 412.0 414.0 2.0 4.31 Lynx SW Lynx including 412.4 412.7 0.3 27.6 WST-20-0570 323.0 325.0 2.0 3.85 Lynx SW Lynx SW WST-20-0574 302.9 305.7 2.8 9.11 Lynx SW Lynx SW 308.0 310.0 2.0 4.07 Lynx SW Lynx SW 394.5 396.9 2.4 5.64 Lynx SW Lynx SW 416.0 418.7 2.7 9.20 Lynx SW Lynx SW including 418.4 418.7 0.3 78.9 510.8 513.0 2.2 4.58 Lynx SW Lynx SW including 511.7 512.2 0.5 20.0 WST-20-0575 159.0 161.0 2.0 3.54 Triple LynxTriple Lynx WST-20-0602 397.1 400.4 3.3 9.53 Lynx SW Lynx SW including 397.6 398.0 0.4 28.7 572.0 577.3 5.3 43.4 29.9 Lynx SW Lynx SW including 572.0 573.0 1.0 172 100 WST-20-0603 250.5 253.7 3.2 56.4 34.3 Lynx SW Lynx SW including 252.0 252.7 0.7 201 100 257.8 260.0 2.2 5.07 Lynx SW Lynx SW 278.0 280.0 2.0 28.0 Triple LynxTriple Lynx including 278.7 279.2 0.5 95.2 WST-20-0606A 248.5 250.5 2.0 5.41 Lynx SW Lynx SW 273.2 275.2 2.0 15.3 Lynx SW Lynx SW including 273.7 274.0 0.3 37.3 329.0 331.0 2.0 4.41 Lynx SW Lynx SW WST-20-0609 299.0 301.4 2.4 12.9 Lynx SW Lynx SW including 300.9 301.4 0.5 57.0 326.7 329.0 2.3 4.77 Triple LynxTriple Lynx including 326.7 327.4 0.7 11.1 346.7 349.0 2.3 3.90 Lynx SW Lynx SW including 346.7 347.2 0.5 17.4 WST-20-0611 289.0 292.4 3.4 52.1 27.0 Triple LynxTriple Lynx including 291.8 292.4 0.6 242 100 WST-20-0615 258.1 260.5 2.4 12.0 Lynx SW Lynx SW WST-20-0626 451.7 453.8 2.1 4.51 Lynx SW Lynx SW WST-20-0631 14.8 17.0 2.2 7.22 Lynx Lynx including 14.8 15.6 0.8 19.7
Notes: True widths are estimated at 55 {㡄 –} 80% of the reported core length interval. See "Quality Control and Reporting Protocols" below. SW = Southwest.
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 plus or minus 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 plus or minus tourmaline alteration and contains disseminated pyrite from trace to 80% with local visible gold. Pyrite stockworks can form envelopes that reach several tens of metres thick. Fuchsite alteration is common and is spatially constrained to near the gabbros. Mineralization occurs at or near geological contacts between felsic porphyritic or fragmental intrusions and the host rhyolites or gabbros and locally can be hosted along the gabbro-rhyolite contact.
Qualified Person
The scientific and technical content of this news release has been reviewed, prepared and approved by Mr. Louis Grenier, M.Sc.A., P.Geo. (OGQ 800), Project Manager of Osisko's Windfall Lake gold project, who is a "qualified person" as defined by National Instrument 43-101 {䮧 –} Standards of Disclosure for Mineral Projects ("NI 43-101").
Quality Control and Reporting Protocols
True width determination is estimated at 55-80% of the reported core length interval for the zone. Assays are uncut except where indicated. Intercepts occur within geological confines of major zones but have not been correlated to individual vein domains at this time. Reported intervals include minimum weighted averages of 3.0 g/t Au diluted over core lengths of at least 2.0 metres. NQ core assays were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at (i) ALS Laboratories in Val d'Or, Quebec, 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 Quebec, Canada. The mineral resource defined by Osisko, as disclosed in the news release dated February 17, 2021 and supported by the technical report entitled "Mineral Resource Estimate Update for the Windfall Project, Eeyou Istchee James Bay, Quebec, Canada" dated March 8, 2021 (with an effective date of November 30, 2020), and assuming a cut-off grade of 3.50 g/t Au, comprises 521,000 tonnes at 11.3 g/t Au (189,000 ounces) in the measured mineral resource category, 5,502,000 tonnes at 9.4 g/t Au (1,668,000 ounces) in the indicated mineral resource category and 16,401,000 tonnes at 8.0 g/t Au (4,244,000 ounces) in the inferred mineral resource category . The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the February 17, 2021 news release are further described in the full technical report prepared by BBA Inc. in accordance with NI 43-101 and is available on SEDAR (www.sedar.com) under the Corporation's issuer profile. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal zones: Lynx, Main Zone, and Underdog.
Mineralization is generally comprised of sub-vertical zones following intrusive porphyry contacts plunging to the northeast. The r esources 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. T he 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 Quebec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quevillon area (over 2,700 square kilometres).
We seek Safe Harbor.
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