Osisko Windfall Infills and Expands With More High-Grade

2022-05-04 / @nasdaq

 

TORONTO, May 04, 2022 (GLOBE NEWSWIRE) -- 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 43 intercepts in 17 underground drill holes and 5 wedges from surface. 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: “May the 4th be with you. Today’s results continue to strengthen our confidence in the high-grade nature of Windfall. While the focus for the feasibility study remains on the Lynx areas, other areas such as Mallard, also continue to infill nicely and contribute high-grade ounces to the resource.”

Selected high-grade intercepts include: 243 g/t Au over 2.8 metres in WST-22-1016, 20.6 g/t Au over 9.5 metres in WST-22-1006-W1; 16.3 g/t Au over 7.9 metres in OSK-W-22-2587-W3; 48.4 g/t Au over 2.1 metres in WST-22-1003A; 37.9 g/t Au over 2.1 metres in WST-22-1010; 36.8 g/t Au over 2.1 metres in WST-21-0940; 38.2 g/t Au over 2.0 metres in OSK-W-21-2601-W2, 37.1 g/t Au over 2.0 meters in WST-21-0991, and 36.1 g/t Au over 2.0 metres in WST-22-1006-W2. Maps showing hole locations and full analytical results are available at www.osiskomining.com. Maps: Long Section_In EN 20220504, Long Section_Ex EN 20220504, PR_EN_20220504_Surface, PR_EN_20220504_UG.

Infill Drilling

Hole No.From (m)To (m)Interval (m)Au (g/t) uncutAu (g/t) cut to 100 g/tZoneCorridor
OSK-W-21-2605-W11352.71355.12.47.53 LX4_3445
Lynx 4
including1352.71353.00.319.4 
OSK-W-22-2587-W31047.61055.57.916.3 TLX_3158
Lynx HW
including1052.01053.01.039.9 
WST-21-0708522.3524.42.122.9 LX4_3401
Lynx 4
including522.3523.00.768.4 
WST-21-089270.072.12.18.41 LXM_3336Lynx
 111.1113.62.515.7 LXM_3359
Lynx
including112.8113.30.548.5 
WST-21-092661.964.02.118.9 LXM_3336
Lynx
including61.962.40.574.2 
WST-21-093896.098.02.08.39 LXM_3371
Lynx
including96.396.70.441.4 
WST-21-0939A60.362.52.23.81 LXM_3336
Lynx
including60.360.70.417.4 
WST-21-0939A96.599.02.511.7 LXM_3371
Lynx
including97.498.10.741.5 
WST-21-094295.097.02.028.715.6LXM_3371
Lynx
including95.595.80.3188100
WST-21-0991173.0175.02.037.130.0LHW_3206
Lynx
including174.4175.00.6124100
WST-22-1006-W1505.5515.09.520.614.8LX4_3404
Lynx 4
including505.5505.80.389.6 
and507.1507.50.4240100
and509.1509.40.392.8 
 560.9563.02.18.21 LX4_3430
Lynx 4
including560.9561.30.441.2 
WST-22-1006-W2519.4521.42.04.30 LX4_3404
Lynx 4
including519.4519.80.417.6 
 523.3527.03.73.93 LX4_3404
Lynx 4
including523.3524.10.88.29 
 582.0584.02.036.130.4LX4_3430
Lynx 4
including582.0582.60.6119100
WST-22-1003A78.080.12.148.433.5MAL_5219
Mallard
including78.579.20.7145100
WST-22-1010400.0402.22.23.62 LX4_3410Lynx 4
 406.0408.02.04.35 LX4_3440Lynx 4
WST-22-1012529.0531.32.312.5 LX4_3450
Lynx 4
including529.6530.40.835.5 
WST-22-1013147.3152.55.29.62 TLX_3161
Triple Lynx
including151.2151.70.524.6 
 206.5212.86.33.54 TLX_3164
Triple Lynx
including206.5207.10.612.5 
and212.1212.80.79.90 
WST-22-1014463.1465.12.04.56 LX4_3430
Lynx 4
including463.6463.90.321.4 
 489.7493.33.64.30 LX4_3461Lynx 4
 516.6519.02.49.53 LX4_3443
Lynx 4
including516.6517.00.425.6 

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


Expansion Drilling

Hole No.From (m)To (m)Interval (m)Au (g/t) uncutAu (g/t) cut to 100 g/tZoneCorridor
OSK-W-21-2601-W21296.21298.22.038.2 LX4
Lynx 4
including1296.61297.20.6100 
OSK-W-22-2605-W21329.81335.05.26.56 LX4_3462
Lynx 4
including1331.71332.30.628.9 
 1374.01376.02.010.7 LX4_3445Lynx 4
 1407.31409.92.617.4 LX4
Lynx 4
including1408.51409.40.946.9 
OSK-W-22-2605-W31433.91436.32.44.74 LX4Lynx 4
WST-21-0939A113.8115.82.013.1 LXM_3359
Lynx
including113.8114.50.730.1 
WST-21-0940111.0113.12.136.830.9LXM_3359
Lynx
including112.5113.10.6121100
WST-21-0941115.2117.32.114.4 LXM_3359
Lynx
including115.2115.60.475.1 
WST-21-0946175.0177.22.226.018.3TLX_3161
Triple Lynx
including176.8177.20.4143100
WST-22-1003A95.497.52.19.97 MAL
Mallard
including97.197.50.434.9 
 166.1169.63.58.29 MAL
Mallard
including168.7169.60.925.4 
WST-22-1006-W1434.8437.42.613.6 LX4
Lynx 4
including434.8436.01.229.0 
WST-22-1010387.9390.02.137.9 LX4
Lynx 4
including387.9388.80.987.7 
WST-22-1011343.5345.52.03.65 TLX
Triple Lynx
including343.8344.10.313.8 
WST-22-1014254.7257.73.03.89 LHW_3224Lynx HW
 318.8322.03.24.38 LXMLynx
WST-22-1016174.0177.33.34.92 TLX
Triple Lynx
including176.6177.30.715.3 
 195.2198.02.824341.4TLX
Triple Lynx
including195.7196.00.31495100

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


Drill hole location

Hole No.Azimuth (°)Dip (°)Length (m)UTM EUTM NElevationSection
OSK-W-21-2601-W2125-61150045342554356564123900
OSK-W-21-2605-W1112-55138045355154356694084025
OSK-W-22-2587-W3127-59122145335054356734133850
OSK-W-22-2605-W2112-55143145355154356694084025
OSK-W-22-2605-W3112-55145545355154356694084025
WST-21-0708134-406704533745435296-263675
WST-21-0892138-2511645331454351641243550
WST-21-0926149-2711145331454351641243550
WST-21-0938146-2210645331454351641243550
WST-21-0939A150-2412945331554351641243550
WST-21-0940148-2112745331554351651253550
WST-21-0941153-2312945331554351641243550
WST-21-0942148-2012645331554351641243550
WST-21-0946168-514034535075435327-73800
WST-21-0991134-293914534615435326323775
WST-22-1003A355-5721345220654349032472475
WST-22-1006-W1121-456284535065435326-903800
WST-22-1006-W2121-456284535065435326-903800
WST-22-1010136-284814534455435276-993725
WST-22-1011134-326304533445435312-663650
WST-22-1012141-505794533225435236543600
WST-22-1013142-444204533605435297-1493675
WST-22-1014123-375404535075435332-473800
WST-22-1016143-654484536475435347-1893950


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.

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

Qualified Person
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


Primary Logo

Share to Youtube Share to Facebook Facebook Share to Linkedin Share to Twitter Twitter Share to Tiktok