Osisko Mining drills 9.7 m of 90.5 g/t Au at Windfall
Osisko Mining drills 9.7 m of 90.5 g/t Au at Windfall
2021-01-18 08:16 ET - News Release
Mr. John Burzynski reports
OSISKO WINDFALL INFILL DRILLING
Osisko Mining Inc. has provided new analytical results from the continuing expansion and definition drill program at its 100-per-cent-owned Windfall gold project located in the Abitibi greenstone belt, Urban township, Eeyou Istchee James Bay, Que.
Drilling is currently focused on the Lynx deposit. Osisko Chief Executive Officer John Burzynski commented: "Broken record alert, infill drilling continues to show both the continuity and high-grade nature of Lynx, consistently returning good results on grade and widths as demonstrated by today's headline hole. We are advancing our work on the deposit at full speed, with over 35 drills active on surface and underground."
The table below contains resource definition infill intercepts located inside the February 2020 mineral resource estimate wireframes (see Osisko news release dated February 19, 2020). Significant new analytical results are presented below and include 46 intercepts in 17 drill holes and 14 wedges.
Selected high-grade intercepts from the new results include: 90.5 g/t Au over 9.7 meters in OSK-W-20-2252-W7; 59.5 g/t Au over 2.0 metres in OSK-W-20-2292-W5; 38.4 g/t Au over 5.5 meters in OSK-W-20-2252-W8; 37.1 g/t Au over 2.0 metres in WST-20-0542A; 32.2 g/t Au over 3.7 metres in OSK-W-20-2243-W6. Maps showing hole locations and full analytical results are available at www.osiskomining.com.
Hole No. From (m)To (m)Interval (m)Au (g/t) uncutAu (g/t) cut to 100 g/t Zone Corridor OSK-W-20-2139-W12 913.0 915.0 2.0 3.96 Lynx_361 Triple Lynx OSK-W-20-2243-W6 925.2 928.9 3.7 32.2 Triple LynxTriple Lynx including 927.2 928.2 1.0 55.2 OSK-W-20-2252-W7 861.3 866.6 5.3 4.54 Triple LynxTriple Lynx including 866.3 866.6 0.3 16.6 871.0 876.0 5.0 5.45 Triple LynxTriple Lynx 900.0 909.7 9.7 90.5 32.3 Lynx_371 Triple Lynx including 904.7 905.2 0.5 324 100 and 905.6 906.2 0.6 725 100 911.2 913.3 2.1 7.79 Lynx_361 Triple Lynx including 912.1 912.4 0.3 33.7 961.9 964.0 2.1 13.7 Lynx_363 Triple Lynx including 962.8 963.1 0.3 75.9 987.0 989.3 2.3 3.76 Lynx_364 Triple Lynx OSK-W-20-2252-W8 877.0 879.0 2.0 4.30 Lynx_371 Triple Lynx 921.8 924.1 2.3 23.7 Lynx_361 Triple Lynx including 922.8 923.4 0.6 62.1 967.0 972.5 5.5 38.4 Lynx_363 Triple Lynx including 969.6 970.6 1.0 91.7 and 970.6 971.6 1.0 69.5 OSK-W-20-2271-W2 1038.0 1040.0 2.0 3.79 Lynx_330 Lynx OSK-W-20-2275 756.0 758.0 2.0 4.76 Triple LynxTriple Lynx OSK-W-20-2275-W3 864.7 867.2 2.5 3.68 Triple LynxTriple Lynx OSK-W-20-2275-W4 933.9 936.2 2.3 3.62 Triple LynxTriple Lynx OSK-W-20-2280-W3 1039.0 1041.0 2.0 4.33 Lynx_363 Triple Lynx including 1039.6 1039.9 0.3 26.3 1045.0 1047.0 2.0 4.58 Lynx_363 Triple Lynx including 1046.2 1046.5 0.3 28.8 OSK-W-20-2280-W4 1124.0 1129.0 5.0 7.04 Lynx_370 Triple Lynx including 1125.3 1125.8 0.5 30.0 OSK-W-20-2280-W5 888.7 890.7 2.0 19.2 Triple LynxTriple Lynx including 890.1 890.7 0.6 62.3 OSK-W-20-2283-W1 826.0 828.0 2.0 3.91 Triple LynxTriple Lynx OSK-W-20-2283-W6 844.8 847.0 2.2 3.62 Triple LynxTriple Lynx including 844.8 845.3 0.5 13.0 OSK-W-20-2292-W5 1039.0 1041.0 2.0 59.5 20.3 Triple LynxTriple Lynx including 1039.4 1039.8 0.4 296 100 OSK-W-20-2292-W6 884.4 886.5 2.1 8.95 Triple LynxTriple Lynx OSK-W-20-2345 144.2 150.0 5.8 4.23 Lynx_355 Lynx OSK-W-20-2350 112.5 115.0 2.5 22.9 20.6 Lynx_335 Lynx including 113.5 113.9 0.4 115 100 137.0 139.0 2.0 16.3 15.8 Lynx_355 Lynx including 137.5 137.8 0.3 103 100 OSK-W-20-2363 686.0 688.0 2.0 3.82 Lynx_365 Triple Lynx WST-20-0011 295.4 297.6 2.2 3.66 Lynx SW Lynx including 296.4 297.0 0.6 11.4 WST-20-0490 114.0 116.1 2.1 28.1 27.7 Lynx_339 Lynx including 115.4 115.8 0.4 102 100 294.3 296.4 2.1 5.57 Triple LynxTriple Lynx including 295.7 296.1 0.4 21.7 WST-20-0498 142.0 144.0 2.0 3.38 Lynx Lynx WST-20-0503 54.0 56.0 2.0 3.76 Lynx_311 Lynx WST-20-0505A 280.0 282.0 2.0 3.19 Lynx SW Lynx SW WST-20-0516 168.0 170.0 2.0 23.8 Lynx_359 Lynx including 168.5 169.3 0.8 43.0 WST-20-0525 159.7 161.8 2.1 10.8 Lynx_359 Lynx including 160.3 160.6 0.3 52.7 WST-20-0536 91.0 93.0 2.0 14.2 Lynx_304 Lynx including 91.7 92.1 0.4 66.9 98.0 100.0 2.0 13.5 Lynx_304 Lynx including 98.6 98.9 0.3 83.8 111.0 113.0 2.0 8.90 Lynx_359 Lynx including 111.8 112.6 0.8 22.2 117.0 119.0 2.0 3.26 Lynx_359 Lynx WST-20-0537 99.8 101.9 2.1 5.28 Lynx_304 Lynx WST-20-0542A 46.9 49.1 2.2 30.3 Lynx_303 Lynx including 46.9 47.6 0.7 94.0 64.3 66.3 2.0 37.1 Lynx_323 Lynx including 65.2 66.3 1.1 63.3 WST-20-0545 95.7 98.0 2.3 18.1 Lynx_304 Lynx 124.0 127.1 3.1 10.6 Lynx_359 Lynx including 126.6 127.1 0.5 46.2 WST-20-0569 243.0 245.0 2.0 13.7 Lynx SW Lynx SW including 243.8 244.2 0.4 67.3 WST-20-0571 413.0 415.0 2.0 6.65 Lynx SW Lynx SW including 413.0 414.0 1.0 13.3
Notes: True widths are estimated at 55 {⤅ –} 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. The vein-type 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.
Triple Lynx
Mineralization in the Triple Lynx zone is vein-type, quartz-carbonate-pyrite-tourmaline veins, associated with pervasive sericite-pyrite plus or minus silica alteration and contain sulphides similar to the main Lynx Zone, pyrite dominated with minor other sulphides, ranging from trace to up to 70% locally, and local visible gold. Locally fuchsite is present when proximal to the gabbros. Mineralization is hosted in or at the contacts of felsic porphyritic dikes with rhyolites (locally bleached) or gabbros.
Qualified Person
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 {㬰 –} 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. All NQ core assays reported were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at (i) ALS Laboratories in Val d'Or, Quebec, Thunder Bay, Ontario, Sudbury, Ontario or Vancouver, British Colombia, or (ii) Bureau Veritas in Timmins, Ontario. The 1-kilogram screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. Selected samples are also analyzed for multi-elements, including silver, using a four acids digestion -MS61 method at ALS Laboratories. Drill program design, 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 Eeyou Istchee James Bay, Quebec, Canada. The mineral resource defined by Osisko, as disclosed in the news release dated February 19, 2020 and supported by the technical report entitled "An updated mineral resource estimate for the Windfall Lake Project, Located in the Abitibi Greenstone Belt, Urban Township, Eeyou Istchee James Bay, Quebec, Canada" and dated April 3, 2020 (with an effective date of January 3, 2020), and assuming a cut-off grade of 3.5 g/t, comprises 4,127,000 tonnes at 9.1 g/t Au (1,206,000 ounces) in the indicated mineral resource category and 14,532,000 tonnes at 8.40 g/t Au (3,938,000 ounces) in the inferred mineral resource category. The key assumptions, parameters and methods used to estimate the mineral resource estimate disclosed in the February 19,2020 news release are further described in the full technical report prepared by Micon International Limited ("Micon") and BBA Inc ("BBA"), in accordance with NI 43-101 available on SEDAR (www.sedar.com) under the Corporation's issuer profile. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal zones: Lynx, Main Zone, and Underdog. Mineralization is generally comprised of deformed sub-vertical zones plunging to the northeast. Vein-type or pyrite replacement-type styles of mineralization crosscut syn-volcanic host rocks and syn-deformation felsic porphyry intrusions and are spatially associated with the contacts of the intrusions. The deposit is well defined from surface to a depth of 1,200 metres and remains open along strike and at depth. Mineralization has been identified 30 metres from surface in some areas and as deep as 2,000 metres in others, with significant potential to extend mineralization down-plunge and at depth.
About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% interest in the high-grade Windfall gold deposit located between Val-d'Or and Chibougamau in 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.