Mr. John Burzynski reports
OSISKO INTERSECTS 56.1 G/T AU OVER 8.9 METRES AT WINDFALL
Osisko Mining Inc. has provided new results from the continuing drill program at its 100-per-cent-owned Windfall Lake gold project located in the Abitibi greenstone belt, Urban township, Eeyou Istchee James Bay, Quebec. The 800,000-metre drill program combines definition, expansion and exploration drilling in and around the main Windfall gold deposit and the adjacent Lynx deposit (located immediately northeast of Windfall).
Significant new analytical results from 72 intercepts in 39 drill holes and six wedges focused on infill and expansion drilling in the Main Windfall Lake deposit are presented in the associated table.
New Bobcat zone with high grades discovered near surface and at shallow depths; Continued high-grade infill and expansion from Underdog; New hit from Drake.
Highlights from the new results include: 56.1 grams per tonne gold over 8.9 metres in OSK-W-17-1336-W1; 218 g/t Au over 2.1 metres in OSK-W-17-1191; 160 g/t over 2.0 metres in OSK-W-17-1142-W1; 106 g/t Au over 3.0 metres in OSK-W-17-1305; 30.8 g/t over 9.9 metres in OSK-OBM-16-693; 83.5 g/t Au over 3.4 metres in OSK-W-17-780-W1; 128 g/t Au over 2.1 metres in OSK-W-17-1203; 58.8 g/t Au over 2.5 metres in OSK-W-17-1095; 72.8 g/t Au over 2.0 metres in OSK-W-17-1020; 42.4 g/t Au over 3.3 metres in OSK-W-17-1138; 52.8 g/t Au over 2.3 metres in OSK-W-17-1381; 26.2 g/t Au over 3.8 metres in OSK-W-17-1374; 41.9 g/t Au over 2.0 metres in OSK-W-17-1289; 14.1 g/t Au over 5.6 metres in OSK-W-17-1255; and 26.5 g/t Au over 2.1 metres in OSK-W-17-1142.
Hole FromToIntervalAu uncut Au cut to 100 g/tNo. (m) (m) (m) (g/t) (g/t)OSK-OBM-16-630518.2 521.0 2.84.82OSK-OBM-16-693654.1 664.0 9.930.822.2including 654.1 656.0 1.980.045.5including 658.1 661.9 3.837.432.1OSK-W-16-747936.9 939.3 2.46.96including 938.1 938.6 0.532.5OSK-W-17-780-W1 1,343.8 1,347.2 3.483.529.4including 1,346.6 1,347.2 0.6 407 100OSK-W-17-936-W1 776.0 778.0 2.03.65including 777.2 778.0 0.88.07785.0 787.7 2.74.03including 787.0 787.7 0.77.71OSK-W-17-936-W2 671.1 673.3 2.211.1OSK-W-17-968102.0 109.4 7.44.02including 107.4 109.4 2.07.77118.0 122.3 4.311.210.5including 122.0 122.3 0.3 109 100OSK-W-17-989-W2 664.6 667.0 2.44.56OSK-W-17-1020 271.5 273.5 2.072.8including 272.0 273.5 1.596.9OSK-W-17-109588.290.7 2.558.852.9including88.689.7 1.1 114 100OSK-W-17-1125 427.0 429.0 2.06.80including 427.0 428.0 1.013.5616.0 618.0 2.03.87including 617.2 618.0 0.89.35OSK-W-17-113811.014.3 3.342.4including13.014.3 1.398.1 21.024.0 3.03.28OSK-W-17-1139 148.0 150.2 2.24.29157.5 160.1 2.64.53including 159.5 160.1 0.69.21OSK-W-17-1140 781.2 783.3 2.17.07including 783.0 783.3 0.348.8OSK-W-17-114213.115.2 2.126.5including14.014.6 0.684.5OSK-W-17-1142-W1370.0 372.0 2.0 160including 370.5 371.5 1.0 320OSK-W-17-117878.080.1 2.15.89including79.580.1 0.617.5OSK-W-17-1191 235.4 237.5 2.1 21834.6including 236.8 237.5 0.7 650 100OSK-W-17-120327.930.0 2.1 12842.9including27.928.8 0.9 298 100OSK-W-17-121827.029.0 2.03.99189.0 191.5 2.54.46OSK-W-17-125124.027.0 3.08.89including24.025.0 1.021.0 55.059.0 4.03.86including55.056.0 1.012.3192.0 195.0 3.04.11including 193.4 193.7 0.340.2OSK-W-17-1255 156.0 161.6 5.614.1including 156.6 159.5 2.921.1OSK-W-17-127354.957.0 2.14.05including54.955.4 0.514.3OSK-W-17-1280 369.8 372.7 2.93.19OSK-W-17-1288 749.0 751.0 2.04.41OSK-W-17-1289 343.0 345.0 2.041.9including 343.0 344.0 1.083.5OSK-W-17-1305 348.0 351.0 3.0 10650.1including 349.5 351.0 1.5 211 100OSK-W-17-1309 218.1 220.2 2.15.64including 218.1 218.8 0.716.5OSK-W-17-1313 425.1 427.3 2.25.46including 425.9 426.7 0.814.2443.0 445.5 2.53.50 19.022.0 3.03.05OSK-W-17-131745.047.5 2.54.31170.0 172.0 2.04.60OSK-W-17-1336-W11,064.1 1,073.0 8.956.115.1including 1,067.0 1,070.1 3.1 15133.7OSK-W-17-1371 604.6 607.0 2.43.61OSK-W-17-1374 312.6 315.0 2.44.27324.5 328.3 3.826.2721.0 723.7 2.73.09including 723.0 723.7 0.710.5OSK-W-17-1378 382.0 384.0 2.04.21477.2 479.3 2.15.49OSK-W-17-1381 111.5 113.8 2.316.7including 112.5 112.9 0.494.6653.0 655.3 2.352.813.2including 654.2 654.5 0.3 404 100OSK-W-17-138329.534.2 4.713.1 83.087.0 4.04.01 94.997.0 2.15.01102.0 104.1 2.15.33including 103.1 104.1 1.010.5OSK-W-17-1385 734.7 737.2 2.58.40including 735.9 736.6 0.728.6741.6 745.3 3.75.04including 744.3 745.3 1.013.0820.5 824.0 3.56.64including 820.5 821.1 0.626.2OSK-W-17-1388 368.6 371.0 2.411.9697.0 699.2 2.24.59OSK-W-17-1390 505.0 507.2 2.23.44OSK-W-17-1391 297.0 299.9 2.912.2including 299.4 299.9 0.565.4OSK-W-17-1393 157.0 159.0 2.03.91including 158.3 158.7 0.416.7OSK-W-17-1399 574.0 576.0 2.03.55OSK-W-17-1400 325.6 328.0 2.44.05OSK-W-17-1404 141.4 144.0 2.64.28including 142.0 143.0 1.011.0168.0 171.0 3.04.54including 170.7 171.0 0.313.4535.0 537.0 2.03.96539.7 543.0 3.34.33356.8 359.5 2.710.4including 358.6 359.0 0.453.2OSK-W-17-140679.381.8 2.56.97including79.780.0 0.347.7248.5 250.9 2.43.47322.0 324.5 2.55.71Notes(1) True widths are estimated at 65 to 80 per cent of the reported core length interval.
OSK-OBM-16-693 intersected 30.8 g/t Au over 9.9 metres in the Underdog corridor. Mineralization is composed of up to 10 per cent pyrite-silica flooding, up to 5 per cent pyrite stringers, 3 per cent disseminated pyrite and local visible gold. The host rhyolite, in contact with a porphyritic felsic dike, is strongly silica and sericite altered.
OSK-W-17-780-W1 intersected 83.5 g/t Au over 3.4 metres in FW3 HW. Mineralization is composed of 4 per cent pyrite stringers and smoky quartz veins within a strongly silica-altered porphyritic felsic dike.
OSK-W-17-1020 intersected 72.8 g/t Au over 2.0 meters in the new Bobcat zone. This zone is northeast along strike and on top of the Caribou corridor. The two zones have parallel plunges to the northeast. Mineralization is composed of 1 per cent disseminated pyrite and 2 per cent of pyrite-silica flooding within a strongly sericitized rhyolite.
OSK-W-17-1095 intersected 58.8 g/t Au over 2.5 metres in zone 27. Mineralization is composed of up to 5 per cent pyrite with low-angle silica flooding hosted in a strongly silicified and fuchsitized andesite.
OSK-W-17-1138 intersected 42.4 g/t Au over 3.3 metres in Bobcat. Mineralization is very near surface (starting 11 metres downhole) and is composed of 3 per cent silica flooding, 1 per cent disseminated pyrite and crustiform vein within a sericitized rhyolite.
OSK-W-17-1139 intersected two veins in a sheared andesite south of the main zone. Mineralization, 4.29 g/t Au over 2.2 metres and 4.53 g/t Au over 2.6 metres, is composed of up to 4 per cent disseminated pyrite within a chloritized andesite.
OSK-W-17-1142-W1 intersected 160 g/t Au over 2.0 metres providing a new hit for Drake. Mineralization is composed of up to 10 per cent pyrite, local visible gold and electrum associated in quartz-carbonate veins. The bleached andesite is near the Red Dog contact.
OSK-W-17-1191 intersected 218 g/t Au over 2.1 metres in zone 27. Mineralization is composed of 5 per cent pyrite stringers and 3 per cent pyrite fragments within a strongly sericitized and silicified andesite.
OSK-W-17-1203 intersected 128 g/t Au over 2.1 metres in zone 27. Mineralization is composed of up to 20 per cent pyrite, pyrite silica flooding and local visible gold within a strongly silicified rhyolite.
OSK-W-17-1251 intersected 8.89 g/t Au over 3.0 metres, 3.86 g/t Au over 4.0 metres and 4.11 g/t Au over 3.0 metres in Bobcat. The first interval is composed of up to 7 per cent pyrite-silica flooding and 1 per cent ptygmatic tourmaline veins within a strongly sericitized and silicified felsic porphyritic dike. The second interval is within a sericitized rhyolite and composed of up to 5 per cent pyrite stringers and disseminated pyrite. The third interval is within a quartz crustiform vein.
OSK-W-17-1255 intersected 14.1 g/t Au over 5.6 metres in Bobcat. Mineralization is composed of up to 10 per cent pyrite within a pyrite-silica flooding running at low core angle. The hosting gabbro is strongly altered in silica and sericite.
OSK-W-17-1289 intersected 41.9 g/t Au over 2.0 meters in Mallard. Mineralization is composed of 1 per cent disseminated pyrite in quartz-tourmaline veins within a chloritized andesite.
OSK-W-17-1305 intersected 106 g/t Au over 3.0 metres in the Caribou corridor. Mineralization is composed of disseminated pyrite within quartz-carbonate veins hosted in a sericitized andesite.
OSK-W-17-1336-W1 intersected 56.1 g/t Au over 8.9 metres in Underdog corridor. Mineralization is composed of local visible gold with up to 8 per cent pyrite stringers, disseminated chalcopyrite and quartz-tourmaline veins within a silicified porphyritic felsic dike.
OSK-W-17-1381 intersected 16.7 g/t Au over 2.3 metres in Bobcat and 52.8 g/t Au over 2.3 metres in zone 27. The first interval is composed of 2 per cent pyrite stringers, 3 per cent pyrite fragments and a 10-centimetres quartz-carbonate vein within a sericitized and silicified rhyolite. The second interval is composed of 4 per cent disseminated pyrite and local visible gold within a quartz-cabonate vein hosted in a chloritized andesite.
OSK-W-17-1383 intersected four intervals in Bobcat: 13.1 g/t Au over 4.7 metres, 4.01 g/t Au over 4.0 metres, 5.01 g/t Au over 2.1 metres and 5.33 g/t Au over 2.1 metres. Mineralization is composed of up to 5 per cent pyrite stringers, 1 per cent pyrite tourmaline stringers and up to 1 per cent disseminated pyrite. The first interval is in a porphyritic felsic dike and the three others are in crustiform veins within a silicified rhyolite.
Zone 27 results also include 12 intercepts from seven drill holes and one wedge. Mineralization is composed of up to 15 per cent pyrite, disseminated or in stringers associated with quartz-tourmaline veins. Host rocks are rhyolites, andesites and felsic dikes.
Caribou results also include 18 intercepts from 12 drill holes. Mineralization is composed of up to 20 per cent pyrite, usually in stringers, locally semi-massive, and quartz-tourmaline veins hosted in altered porphyritic felsic dikes, andesites and rhyolites.
Wolf results include foiur intercepts from two drill holes and two wedges. Mineralization is composed of up to 70 per cent pyrite-silica flooding, up to 20 per cent pyrite stringers, and ptygmatic tourmaline veins hosted in silicified, sericitized and fuchsitized andesite.
Underdog results also include four intercepts from four drill holes. Mineralization is composed of up to 20 per cent pyrite, usually in stringers associated with trace quartz-tourmaline veins and hosted in porphyritic felsic dikes. Host dikes are strongly silica altered.
Bobcat results also include 11 intercepts from seven drill holes. Mineralization is composed of up to 10 per cent pyrite-silica flooding, up to 5 per cent disseminated pyrite and crustiform quartz veins within chloritized, sericitized andesites, rhyolites and felsic dikes.
Qualified person
The scientific and technical content of this news release has been reviewed, prepared and approved by Louis Grenier, MScA, PGeo (OGQ 800), project manager of the Windfall Lake gold project, who is a qualified person as defined by National Instrument 43-101, Standards of Disclosure for Mineral Projects.
Quality control and reporting protocols
True widths determinations are estimated at 65 per cent to 80 per cent of the reported core length intervals for most of the zones. 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 one-kilogram screen fire assay or standard 50-gram fire assaying, AA finish or gravimetric finish, at ALS Laboratories in Val d'Or, Que., Thunder Bay and Sudbury, Ont., or Vancouver, B.C., or Bureau Veritas in Timmins, Ont. The one-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 multielements, 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 are 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 per cent of sample pulps are sent to secondary laboratories for check assay.
About the Windfall Lake gold deposit
The Windfall Lake gold deposit is located between Val d'Or and Chibougamau in the Abitibi region of Quebec, Canada. The mineral resource defined by the previous operator comprises 2,762,000 tonnes at 8.42 g/t Au (748,000 ounces) in the indicated category and 3,512,000 tonnes at 7.62 g/t Au (860,000 ounces) in the inferred category (sourced from a technical report dated June 10, 2015, entitled "Preliminary Economic Assessment of the Windfall Lake Gold Property, Quebec, Canada," with an effective date of April 28, 2015, prepared in accordance with NI 43-101). The Windfall Lake gold deposit is currently one of the highest-grade resource-stage gold projects in Canada. The bulk of the mineralization occurs in the Main zone, a southwest/northeast-trending zone of stacked mineralized lenses, measuring approximately 600 metres wide and at least 1,400 metres long. The deposit is well defined from surface to a depth of 500 metres and remains open along strike and at depth. Mineralization has been identified only 30 metres from surface in some areas and as deep as 870 metres in others, with significant potential to extend mineralization up and 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-per-cent interest in the high-grade Windfall Lake gold deposit located between Val d'Or and Chibougamau in Quebec and holds a 100-per-cent undivided interest in a large area of claims in the surrounding Urban Barry area and nearby Quevillon area (over 3,300 square kilometres), a 100-per-cent interest in the Marban project located in the heart of Quebec's prolific Abitibi gold mining district, and properties in the Larder Lake mining division in Northeastern Ontario, including the Jonpol and Garrcon deposits on the Garrison property, the Buffonta past-producing mine, and the Gold Pike mine property. The corporation also holds interests and options in a number of additional properties in Northern Quebec and Ontario. Osisko continues to be well financed with approximately $190-million in cash and investments.
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