OSISKO INFILL DRILLING CONTINUES TO INTERSECT HIGH GRADE

2020-03-31 / @nasdaq

 

415 g/t Au over 2.0 Metres

149 g/t Au Over 5.6 Metres

TORONTO, March 31, 2020 (GLOBE NEWSWIRE) -- Osisko Mining Inc. (OSK:TSX. "Osisko" or the "Corporation") is pleased to provide new infill drilling results from the definition and expansion drill program at its 100% owned Windfall gold project located in the Abitibi greenstone belt, Urban Township, Eeyou Istchee James Bay, Québec.

The current program is focused on the Lynx deposit, exploration on the main mineralized zones, and deep exploration in the central areas of the mineralized system. Prior to the government mandated temporary shutdown related to the Covid-19 crisis, fifteen surface drills and four underground rigs on the exploration ramp were active at Lynx and Triple Lynx. Significant new analytical results from the infill program are presented below and include from 90 intercepts in 34 drill holes, 12 wedges, and 5 extensions of previous drill holes.

Selected high-grade intercepts from new results include: 149 g/t Au over 5.6 metres in OSK-W-20-2170-W2; 415 g/t Au over 2.0 metres and 85.7 g/t Au over 2.0 metres in OSK-W-20-2100-W7; 337 g/t Au over 2.0 metres and 243 g/t Au over 2.0 metres in WST-20-0295; 21.9 g/t Au over 18.1 metres and 36.9 g/t Au over 9.7 metres in OSK-W-19-1272-W4; 79.1 g/t Au over 2.2 metres and 61.2 g/t Au over 2.3 metres in OSK-W-20-1731-W5; 21.2 g/t Au over 6.0 metres in OSK-W-18-1739. Maps showing hole locations and full analytical results are available at www.osiskomining.com.

Infill Drilling

Hole No.From (m)To (m)Interval (m)Au (g/t) uncutAu (g/t)  cut to 100 g/tZoneCorridor
OSK-W-17-1121701.4703.62.25.77 Lynx_367Lynx
OSK-W-17-1346620.1626.26.13.44 Lynx_365Lynx
OSK-W-18-17331102.01104.52.57.59 Lynx_338Lynx
including1103.31103.70.429.2 
OSK-W-18-1738696.4699.02.63.95 Lynx_367Lynx
including696.4696.80.414.7 
 706.0708.32.33.21 Lynx_367Lynx
 710.0712.32.318.3 Lynx_367Lynx
including710.4711.30.944.7 
OSK-W-18-1739703.0709.06.021.2 Lynx_331Triple Lynx
including707.0708.01.095.1 
 722.0726.04.05.41 Lynx_331Lynx
including725.0726.01.016.1 
 737.0739.02.013.0 Lynx_331Lynx
including737.9738.20.381.1 
OSK-W-19-1166-W6938.2941.12.97.35 Lynx_330Lynx
including940.2940.60.450.6 
 960.5962.92.449.428.9Lynx_330Lynx
including961.5962.10.6182100
OSK-W-19-1181-W121137.01139.02.03.15 Lynx_330Lynx
OSK-W-19-1272-W4763.5772.08.58.56 Lynx_371Lynx
including763.5764.00.548.8 
 774.5792.618.121.915.4Lynx_361Lynx
including780.0780.40.4392100
and786.1786.60.555.6 
and791.2792.10.947.9 
 839.9849.69.736.926.4Lynx_363Lynx
including841.0841.80.8227100
and848.0849.01.061.0 
 884.0886.62.612.0 Lynx_364Lynx
including884.9885.40.537.1 
OSK-W-19-1731-W4878.0880.02.03.16 Lynx_313Lynx
OSK-W-19-1897848.0851.03.04.37 Underdog_4100Underdog
 860.0862.32.319.0 Underdog_4100Underdog
including860.8861.81.042.8 
 892.0894.02.06.96 Underdog_4102Underdog
 983.3985.62.36.35 Underdog_4511Underdog
including985.1985.60.517.8 
OSK-W-19-1903205.6208.02.43.35 Caribou_2506Caribou
including205.6206.40.810.0 
OSK-W-19-1995424.1427.33.24.19 Caribou_2534Caribou
OSK-W-19-2059863.8866.72.97.07 Lynx_327Lynx
including865.4865.70.343.0 
OSK-W-19-2067-W21155.01157.02.04.49 Lynx_374Triple Lynx
OSK-W-19-2077797.0799.02.04.35 Lynx_364Triple Lynx
OSK-W-19-2119129.3132.12.88.26 F11_6000F-11
 157.0161.14.112.6 F11_6001F-11
including157.0158.01.037.3 
OSK-W-19-2139887.9890.02.13.81 Lynx_361Triple Lynx
including887.9888.30.414.4 
OSK-W-20-1072-W4868.4871.93.59.90 Lynx_330Lynx
including868.4869.00.637.1 
 928.0930.22.211.7 Lynx_340Lynx
including928.0928.30.332.9 
OSK-W-20-1731-W5547.5549.72.279.115.4Lynx_304Lynx
including549.4549.70.3567100
 915.0917.22.215.8 Lynx_329Lynx
including916.4917.20.832.2 
 923.0925.32.361.213.4Lynx_329Lynx
including923.8924.10.3466100
OSK-W-20-1733-W1979.0981.02.018.6 Lynx_329Lynx
including979.9980.20.364.0 
OSK-W-20-2100-W7923.0925.02.085.755.7Lynx_361Lynx
including923.6924.00.4186100
and924.3925.00.7137100
 933.0935.02.041516.1Lynx_361Lynx
including934.0934.30.32760100
 946.0948.02.03.81 Lynx_361Lynx
 959.0962.03.06.58 Lynx_361Lynx
 967.0969.02.04.79 Lynx_363Lynx
including967.7968.00.326.0 
 979.0981.62.67.05 Lynx_364Lynx
including981.0981.60.620.8 
OSK-W-20-2139-W5891.1894.63.54.93 Lynx_361Lynx
including891.1891.50.427.7 
 941.7947.05.33.60 Lynx_364Lynx
including941.7943.01.37.91 
 1113.41115.92.53.12 Lynx_374Triple Lynx
including1114.41114.80.418.7 
OSK-W-20-2170-W2971.0976.65.614939.3Lynx_363Lynx
including974.8976.61.8439100
 1116.01118.02.013.8 Lynx_370Triple Lynx
including1116.91117.20.380.8 
OSK-W-20-2202-W2930.7934.43.711.8 Lynx_361Lynx
including932.9933.40.527.2 
and934.1934.40.350.2 
 949.0951.02.015.4 Lynx_363Lynx
including950.0950.30.381.1 
 954.4960.56.17.49 Lynx_363Lynx
including954.4954.70.354.4 
OSK-W-20-2237133.0135.32.33.80 Lynx_311Lynx
including133.0133.50.514.8 
OSK-W-20-224464.666.82.23.89 Lynx_304Lynx
 108.7111.02.321.520.1Lynx_311Lynx
including109.5109.90.4108100
OSK-W-20-224577.379.42.17.31 Lynx_304Lynx
including77.377.90.625.2 
OSK-W-20-224662.064.02.010.7 Lynx_311Lynx
including62.362.90.635.5 
OSK-W-20-224855.958.02.18.14 Lynx_311Lynx
including56.356.60.356.7 
WST-19-0187124.2126.42.23.83 Z27_1115Zone 27
including125.8126.10.318.1 
WST-19-0234119.0121.02.010.8 Lynx_304Lynx
including120.7121.00.367.4 
WST-19-023569.671.62.025.423.5Lynx_308Lynx
including70.370.60.3113100
 101.0103.62.66.58 Lynx_320Lynx
including103.2103.60.442.6 
 118.8121.12.37.89 Lynx_304Lynx
including120.6121.10.530.3 
WST-20-028248.050.02.07.53 Lynx_311Lynx
WST-20-0290103.0105.12.17.92 Lynx_320Lynx
including103.0103.80.819.9 
WST-20-0295134.0136.02.024320.6Lynx_304Lynx
including134.5134.90.41210100
 142.0144.02.033717.9Lynx_304Lynx
including142.4142.70.32230100
WST-20-029863.265.42.23.94 Lynx_311Lynx
including65.065.40.421.0 
 135.7137.82.121.8 Lynx_320Lynx
including136.7137.50.856.9 
WST-20-033185.087.82.88.41 Lynx_304Lynx
including87.087.80.824.8 
WST-20-033394.096.12.14.33 Lynx_304Lynx
including95.696.10.517.9 
WST-20-033460.062.02.04.53 Lynx_325Lynx
 94.797.32.656.953.6Lynx_304Lynx
including96.097.31.3107100
WST-20-033551.053.52.54.47 Lynx_303Lynx
 117.3119.52.25.16 Lynx_359Lynx
including118.0118.70.716.0 
WST-20-033650.456.05.63.97 Lynx_311Lynx
including50.451.41.08.12 
and55.056.01.011.0 
 103.0105.02.050.243.6Lynx_323Lynx
including103.4104.41.098.785.4
 121.9124.02.121.7 Lynx_304Lynx
including122.4122.90.574.2 
WST-20-033874.576.72.24.23 Lynx_323Lynx
including74.575.30.89.99 
 85.587.92.43.42 Lynx_304Lynx
WST-20-0355110.6112.72.14.58 Lynx_304Lynx
including110.6111.20.612.8 
WST-20-0356111.5113.72.25.08 Lynx_304Lynx
WST-20-0357114.6117.22.65.26 Lynx_323Lynx
including114.6115.10.510.9 
WST-20-0358118.5120.72.28.65 Lynx_323Lynx
including118.5119.51.016.8 
 127.5130.02.538.217.4Lynx_304Lynx
including128.7129.10.4230100
WST-20-0360108.0110.02.018.7 Lynx_304Lynx
including108.6108.90.386.6 
 126.2128.42.210.9 Lynx_359Lynx
including126.5126.80.351.5 
 129.6131.72.15.11 Lynx_359Lynx
WST-20-0361113.0115.22.24.02 Lynx_304Lynx
 125.4127.82.425.512.5Lynx_359Lynx
including125.4125.70.3204100
WST-20-0373131.1133.22.111.7 Lynx_304Lynx
including132.8133.20.440.2 
WST-20-0374135.3139.44.117.5 Lynx_304Lynx
including135.3136.00.771.3 
and138.5138.80.352.9 
WST-20-0387151.8153.82.06.27 Lynx_304Lynx
including151.8152.20.430.9 

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

Drill hole location

Hole NumberAzimuth (°)Dip (°)Length (m)UTM EUTM NElevationSection
OSK-W-17-1121335-6478345343654349593963575
OSK-W-17-1346334-6485845346754350693973650
OSK-W-18-1733138-51114045332954354664063725
OSK-W-18-1738329-6981545346054349863963600
OSK-W-18-1739125-5581345313354353544163500
OSK-W-19-1166-W6132-59113745362154356384054050
OSK-W-19-1181-W12133-58137145378954357904014275
OSK-W-19-1272-W4127-60107045324654355354123675
OSK-W-19-1731-W4139-5197545338354355184093800
OSK-W-19-1897331-57112545253554344054032500
OSK-W-19-1903330-6056445247054343824002450
OSK-W-19-1995336-5956445281854347753972950
OSK-W-19-2059131-5299345344654354774003825
OSK-W-19-2067-W2123-53115945324154356974163750
OSK-W-19-2077127-57112345314754354894183575
OSK-W-19-2119148-4528245254654360014053300
OSK-W-19-2139115-52114945298054355494203450
OSK-W-20-1072-W4145-57109245361254355323994000
OSK-W-20-1731-W5139-51102845338354355184093800
OSK-W-20-1733-W1138-51120645332954354664063725
OSK-W-20-2100-W7122-47112245309354357264193650
OSK-W-20-2139-W5115-52114645298054355494203450
OSK-W-20-2170-W2128-59118845342554356574133900
OSK-W-20-2202-W2127-54114645299954356064243500
OSK-W-20-2237337-4920745326754349603983425
OSK-W-20-2244330-5216545323554349703983400
OSK-W-20-2245321-4915345323554349703983400
OSK-W-20-2246329-5211145323654350013993425
OSK-W-20-2248328-5212345321554350063983400
WST-19-0187320613945211854346061872250
WST-19-02341501715745321654351142243450
WST-19-0235150915945321654351142243450
WST-20-0282173-168245322854351261353475
WST-20-0290140222345322954351271363475
WST-20-0295131-716645322954351271363475
WST-20-0298130-3618445322954351271353475
WST-20-0331137-113345341154352301143675
WST-20-0333140-2413645341154352301143675
WST-20-0334140-3614145341154352301133675
WST-20-0335141-4214245341154352301133675
WST-20-0336134-4414845341154352301133675
WST-20-0338146-1211245341054352291143675
WST-20-0355145-2424745345054352651163725
WST-20-0356147-1414245345054352651163725
WST-20-0357143-4016345345054352651153725
WST-20-0358146-4316845345054352651153725
WST-20-0360151-2325445345054352651163725
WST-20-0361152-2829545345054352651153725
WST-20-0373155-4116845349354352871163775
WST-20-0374152-4517545349454352871163775
WST-20-0387152-5220845349454352871163775

Lynx Zone
Mineralization in the Lynx zone is typically characterized by trace to 15% disseminated, clustered or stringer pyrite (locally up to 70%), local visible gold, trace to 3% sphalerite, chalcopyrite, and galena, local ptygmatic pyrite-tourmaline or tourmaline veinlets, quartz-carbonate veins (locally crustiform), smoky quartz veins and veinlets, and local chlorite-calcite or quartz-carbonate chlorite fracture filling. Alteration consists of weak to strong sericite, weak to strong silica with areas of local pervasive silica flooding, weak to moderate chlorite and carbonate, and locally weak to strong fuchsite. Mineralization is hosted in or at the contacts of felsic porphyritic or fragmental intrusions with rhyolites, andesites (locally bleached), or gabbros.

Triple Lynx Zone
Mineralization in the Triple Lynx zone is typically characterized by trace to 30% disseminated, clustered or stringer pyrite, local visible gold, trace sphalerite, chalcopyrite, and galena, local quartz-tourmaline veins (up to 20%), local ptygmatic tourmaline veins, and local smoky quartz and quartz-carbonate veins. Alteration consists of weak to strong sericite, weak to strong silica with areas of local pervasive silica flooding, weak to moderate chlorite and carbonate, and locally weak to strong fuchsite. Mineralization is hosted in or at the contacts of felsic porphyritic dikes with rhyolites (locally bleached) or gabbros.

Zone 27
Mineralization in Zone 27 is typically characterized by 5% to 50% disseminated, stringer, semi-massive or stockwork pyrite, ptygmatic tourmaline veins, quartz-tourmaline crustiform veins, and local quartz-carbonate veins. Local visible gold is observed as small specks or clusters with quartz veins. Alteration consist of moderate to strong sericite, weak to strong silica, weak chlorite and carbonate and locally weak fuchsite. Mineralization is hosted in strongly altered andesites or in or at the contact of the rhyolite.

Caribou Zone
Mineralization in the Caribou zone is typically characterized by trace to 20% disseminated, clustered or stringer pyrite, trace chalcopyrite, sphalerite, and local quartz-tourmaline and quartz-carbonate veins. Local visible gold and electrum is observed in the quartz veins or has remobilization in fractures filling. Alteration consists of weak to strong sericite, weak to moderate silica, and moderate carbonate and chlorite. Mineralization is hosted in andesites or rhyolites frequently at or near the contact of felsic porphyritic dikes.

Underdog Zone
Mineralization in the Underdog zone is typically characterized by trace to 30% disseminated, clustered, or stringer pyrite, local visible gold, quart-tourmaline veins, ptygmatic tourmaline veins and local quartz-carbonate veins. Alteration consists of weak to strong silica or weak to strong sericite. Mineralization is hosted in or at the rheological contacts between felsic porphyritic intrusions with strong alteration.

F-Zone
Mineralization in the F-Zone is typically characterised by trace to 10% disseminated or clustered pyrite, and local visible gold in fracture filling and quartz-carbonate veins. Alteration consists of medium to strong carbonate, weak to moderate sericite, and weak silica. Mineralization is hosted in sheared andesites with carbonate replacement or quartz veining.

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

Quality Control and Reporting Protocols
True width determination is estimated at 55-80% of the reported core length interval for the zone. Assays are uncut except where indicated. Intercepts occur within geological confines of major zones but have not been correlated to individual vein domains at this time. Reported intervals include minimum weighted averages of 3.0 g/t Au diluted over core lengths of at least 2.0 metres. All NQ core assays reported were obtained by either 1-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at (i) ALS Laboratories in Val d'Or, Québec, Thunder Bay, Ontario, Sudbury, Ontario or Vancouver, British Colombia, or (ii) Bureau Veritas in Timmins, Ontario. The 1-kilogram screen assay method is selected by the geologist when samples contain coarse gold or present a higher percentage of pyrite than surrounding intervals. Selected samples are also analyzed for multi-elements, including silver, using an Aqua Regia-ICP-AES method at ALS Laboratories. Drill program design, Quality Assurance/Quality Control ("QA/QC") and interpretation of results is performed by qualified persons employing a QA/QC program consistent with NI 43-101 and industry best practices. Standards and blanks are included with every 20 samples for QA/QC purposes by the Corporation as well as the lab. Approximately 5% of sample pulps are sent to secondary laboratories for check assay.

About the Windfall Gold Deposit
The Windfall gold deposit is located between Val-d'Or and Chibougamau in Eeyou Istchee James Bay, Québec, Canada. The mineral resource defined by Osisko, as disclosed in the news release dated February 19, 2020, and 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, certain of which are described in that news release, will be further described in the full technical report being prepared for this updated mineral resource estimate in accordance with NI 43-101, and will be available on SEDAR (www.sedar.com) under the Corporation's issuer profile within 45 days. The Windfall gold deposit is currently one of the highest-grade resource-stage gold projects in Canada and has world-class scale. Mineralization occurs in three principal zones: Lynx, Main Zone, and Underdog.  Mineralization is generally comprised of sub-vertical zones following intrusive porphyry contacts plunging to the northeast. The deposit is well defined from surface to a depth of 1,200 metres and remains open along strike and at depth. Mineralization has been identified 30 metres from surface in some areas and as deep as 2,000 metres in others, with significant potential to extend mineralization down-plunge and at depth.

About Osisko Mining Inc.
Osisko is a mineral exploration company focused on the acquisition, exploration, and development of precious metal resource properties in Canada. Osisko holds a 100% interest in the high-grade Windfall gold deposit located between Val-d'Or and Chibougamau in Québec and holds a 100% undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quévillon area (over 2,700 square kilometres).

Cautionary Note Regarding Forward-Looking Information
This news release contains "forward-looking information" within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections and interpretations as at the date of this news release. Any statement that involves predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often, but not always, using phrases such as "expects", or "does not expect", "is expected", "interpreted", "management's view", "anticipates" or "does not anticipate", "plans", "budget", "scheduled", "forecasts", "estimates", "potential", "feasibility", "believes" or "intends" or variations of such words and phrases or stating that certain actions, events or results "may" or "could", "would", "might" or "will" be taken to occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. This news release contains the forward-looking information pertaining to, among other things: the Windfall gold deposit being one of the highest-grade resource-stage gold projects in Canada and having world-class scale; the key assumptions, parameters and methods used to estimate the mineral resource estimate; the prospects, if any, of the Windfall gold deposit; timing and ability of Osisko to file a technical report for the mineral resource estimate; the timing and ability of Osisko, if at all, to publish a feasibility study for the Windfall gold deposit; the projected capital expenditures of mining activities at the Windfall gold deposit; upgrading an inferred mineral resource to a measured mineral resource or indicated mineral resource category; future drilling at the Windfall gold deposit; the deposit remaining open along strike to the northeast and at depth; significant high-grade zones (Lynx 4, Triple Lynx) remaining open down plunge; the plunge potential of the Lynx and Underdog zones; the significance of historic exploration activities and results. Such factors include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management's geological modelling; the ability of Osisko to complete further exploration activities, including drilling; property and royalty interests in the Windfall gold deposit; the ability of the Corporation to obtain required approvals; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, Osisko cannot assure shareholders and prospective purchasers of securities of the Corporation that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither Osisko nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. Osisko does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law.

CONTACT INFORMATION:
John Burzynski
President & Chief Executive Officer
Telephone (416) 363-8653

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