Mr. John Burzynski reports
OSISKO INTERSECTS 71.9 G/T AU OVER 2.9 METRES AT LYNX
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 ownship, 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 31 intercepts in 22 drill holes and three wedges focused on infill and expansion drilling in the Lynx deposit are presented in the associated table. Osisko continues to extend the known Lynx zones of mineralization through the application of the Windfall geological model and as the density of drilling increases.
Highlights from the new results include: 71.9 grams per tonne gold over 2.9 metres OSK-W-17-941; 76.4 g/t Au over 2.4 metres and 52.5 g/t Au over 2.1 metres in OSK-W-17-1367-W1, 52.3 g/t Au over 2.1 metres in OSK-W-17-967, 40.6 g/t Au over 2.3 metres in OSK-W-17-1413; 48.0 g/t Au over 2.0 metres in OSK-W-18-1422 and 10.1 g/t Au over 6.5 metres in OSK-W-18-1415. Maps showing hole locations and full analytical results are available at the company's website.
HoleFrom To IntervalAu uncutAu cut to 100 g/tNo.(m)(m)(m) (g/t)(g/t)OSK-W-17-898 375.5380.75.23.75including375.5376.20.710.8including380.2380.70.516.4OSK-W-17-907 893.0895.02.05.71including894.0895.01.010.3OSK-W-17-941 231.0233.92.971.9 25.9including 231.85 232.150.3 545100OSK-W-17-967 240.9243.02.152.3 47.7including242.0243.01.0 109100OSK-W-17-1099108.0110.12.13.04including109.8110.10.314.5OSK-W-17-1104560.0562.02.04.30including560.5561.30.810.4 591.8594.02.24.06including591.8592.30.517.8OSK-W-17-1113363.4366.02.63.33including365.6366.00.419.5OSK-W-17-1115693.0695.02.011.7OSK-W-17-1147712.8716.53.73.29including712.8713.10.324.4OSK-W-17-1177575.0577.02.03.21OSK-W-17-1181-W3 1,113.71,116.42.76.11OSK-W-17-1187264.0266.72.73.43OSK-W-17-1190430.0432.02.05.91including430.6431.61.011.6OSK-W-17-1193979.0981.82.84.48OSK-W-17-1290423.0427.04.034.5including425.0427.02.067.5OSK-W-17-1293 41.5 44.02.514.4including 43.0 44.01.035.4OSK-W-17-1356229.6232.02.44.14OSK-W-17-1367-W1 1,009.51,011.62.152.5 29,2including1,010.31,010.90.6 182100 1,016.61,019.02.476.4 28.3including1,016.61,017.10.5 331100OSK-W-17-1396897.0899.82.86.13OSK-W-17-1413296.0298.32.340.6 39.4including297.4298.30.9 103100 967.8970.22.48.35including967.8968.70.915.9OSK-W-18-1414-W1 842.4846.03.68.20including842.4843.00.620.6including844.8845.30.517.1 855.2857.92.726.5OSK-W-18-1415457.0463.56.510.1including457.0457.70.768.8OSK-W-18-1418544.0546.32.38.09including545.2545.50.361.0 551.0553.22.24.02OSK-W-18-1422386.0388.02.048.0 21.8including386.7387.10.4 231100OSK-W-18-1423107.5109.62.17.77including108.5108.90.438.7 221.2223.72.54.65Notes(1) True widths are estimated at 65 to 80 per cent of the reported core length interval.
OSK-W-17-898 intersected Lynx 3 with 3.75 g/t Au over 5.2 metres. Mineralization is composed of 4 per cent disseminated pyrite and 3 per cent pyrite stringers hosted in quartz-tourmaline and quartz-carbonates veins in a fragmental felsic dike.
OSK-W-17-907 intersected Lynx 4 with 5.71 g/t Au over 2.0 metres. Mineralization is composed of 1 per cent quartz-tourmaline veins with pyrite and 1 per cent pyrite-silica flooding within a strongly sericitized and silicified rhyolite.
OSK-W-17-941 intersected 71.9 g/t Au over 2.9 metres in Lynx 2. Mineralization is composed of local visible gold within a silicified and weakly sericitized fragmental felsic dike.
OSK-W-17-967 intersected crustiform veins returning 52.3 g/t Au over 2.1 metres in the Lynx 2 mineralization is composed of 1 per cent disseminated pyrite in quartz-carbonate-chlorite veins within a sericitized gabbro.
OSK-W-17-1099 intersected 3.04 g/t Au over 2.1 metres in Lynx 2. Mineralization is composed of up to 2 per cent pyrite clusters, 10 per cent pyrite in pervasive silica flooding and 3 per cent pyrite-tourmaline stringers hosted in a silica-altered fragmental felsic dike.
OSK-W-17-1104 intersected 4.30 g/t Au over 2.0 metres and 4.06 g/t Au over 2.2 metres in Lynx HW. Mineralization is composed of up to 3 per cent disseminated and stringer pyrite within a gabbro with sericite and fuchsite alteration.
OSK-W-17-1113 intersected 3.33 g/t Au over 2.6 metres. Mineralization is composed of quartz veins with trace pyrite stringers and 1 per cent pyrite clusters and quartz-carbonate veins in a weakly sericitized rhyolite.
OSK-W-17-1115 intersected 11.7 g/t Au over 2.0 metres related to vein-type mineralization. The interval is composed of 5 per cent pyrite-tourmaline stringers and quartz veins within a chloritized andesite.
OSK-W-17-1147 intersected 3.29 g/t Au over 3.7 metres in Lynx 4. Mineralization is composed of 1 per cent pyrite clusters with ptygmatic tourmaline veins within a sericitized rhyolite.
OSK-W-17-1177 intersected Lynx 1 with 3.21 g/t Au over 2.0 metres. Mineralization is composed of 1 per cent pyrite stringers and tourmaline veins at a fuchsite-altered contact between a gabbro and a porphyritic felsic dike.
OSK-W-17-1181-W3 intersected Lynx 4 with 6.11 g/t Au over 2.7 metres. Mineralization is composed of disseminated pyrite and tourmaline ptygmatic veins in a porphyritic felsic dike crosscutting a gabbro.
OSK-W-17-1187 intersected Lynx 3 with 3.43 g/t Au over 2.7 metres. Mineralization is composed of 4 per cent pyrite clusters and 2 per cent pyrite stringers with pervasive silica alteration in a sericitized porphyritic felsic dike.
OSK-W-17-1190 intersected 5.91 g/t Au over 2.0 metres in Lynx 1. Mineralization is composed of 5 per cent pyrite stringers and 3 per cent pyrite-silica flooding within a moderate sericite-altered porphyritic felsic dike.
OSK-W-17-1193 intersected Lynx 4 with 4.48 g/t Au over 2.8 metres. Mineralization is composed of up to 2 per cent pyrite stringers within a strongly sericitized felsic porphyritic dike.
OSK-W-17-1290 intersected 34.5 g/t Au over 4.0 metres in a vein within the Lynx corridor. Mineralization is composed of traces of disseminated pyrite within a gabbro with strong chlorite and carbonate alteration.
OSK-W-17-1293 intersected Lynx 1 with 14.4 g/t Au over 2.5 metres. Mineralization is composed of disseminated pyrite, pyrite stringers and quartz-carbonates veins in a chloritized mafic intrusion bordered by the Bank fault deformation zone.
OSK-W-17-1356 intersected Lynx 1 with 4.14 g/t Au over 2.4 metres. Mineralization is composed of traces of pyrite clusters and/or fragments and pyrite stringers at the contact between a sericitized fragmental intrusive unit and an andesite.
OSK-W-17-1367-W1 intersected Lynx 4 with 52.5 g/t Au over 2.1 metres and 76.4 g/t Au over 2.4 metres. The first interval is composed of 4 per cent pyrite clusters in 10-centimetre quartz-tourmaline veins and disseminated pyrite in a strongly fuchsite-altered gabbro. The second interval is composed of trace pyrite-tourmaline stringer, 1 per cent disseminated pyrite and 4 per cent pyrite in ptygmatic tourmaline veinlets with trace chalcopyrite. Local visible gold is present in brittle fractures crosscutting tourmaline ptygmatic veins at contact between a small porphyritic dike and a fuchsite-altered gabbro.
OSK-W-17-1396 intersected 6.13 g/t Au over 2.8 metres in Lynx 4. The mineralization is composed of up to 15 per cent pyrite in quartz-tourmaline veins and 1 per cent chalcopyrite within a sericitized and bleached mafic intrusion.
OSK-W-17-1413 intersected Lynx 2 with 40.6 g/t Au over 2.3 metres and Lynx 6 with 8.35 g/t Au over 2.4 metres. The first interval is composed of local visible gold and 1 per cent pyrite clusters within a rhyolite with intense pervasive silica flooding. The second interval is composed of local visible gold and 3 per cent disseminated pyrite in carbonate fracture filling, 2 per cent pyrite stringers in smoky quartz veins hosted in a sheared andesite with chlorite alteration.
OSK-W-18-1414-W1 intersected Lynx 1 with 8.20 g/t Au over 3.6 metres and 26.5 g/t Au over 2.7 metres. The first interval is composed of up to 7 per cent pyrite clusters, up to 3 per cent pyrite stringers and ptygmatic quartz-tourmaline veins within a sericitized gabbro and rhyolite contact. The second interval is composed of up to 5 per cent pyrite-silica flooding and 3 per cent pyrite stringers within a strong silica-altered rhyolite.
OSK-W-18-1415 intersected Lynx HW with 10.1 g/t Au over 6.5 metres. Mineralization is composed of local visible gold, up to 15 per cent pyrite with pervasive silica flooding within a weakly bleached, sericitized and fuchsite-altered gabbro.
OSK-W-18-1418 intersected Lynx 4 with 8.09 g/t Au over 2.3 metres and 4.02 g/t Au over 2.2 metres. Mineralization is composed of up to 5 per cent pyrite stringers and 3 per cent pyrite clusters in smoky quartz with, local carbonate in fracture filling and disseminated tourmaline hosted in a sericitized and silicified rhyolite.
OSK-W-18-1422 intersected Lynx hangingwall with 48.0 g/t Au over 2.0 metres. Mineralization is composed of up to 5 per cent pyrite stringers, up to 3 per cent pyrite clusters and 2 per cent disseminated pyrite within a sericite, fuchsite- and silica-altered gabbro.
OSK-W-18-1423 intersected two intervals, 7.77 g/t Au over 2.1 metres in Lynx 1 and 4.65 g/t Au over 2.5 metres, in a crustiform vein. The first interval is composed of 3 per cent pyrite stringers, 1 per cent pyrite clusters and crustiform quartz-carbonates veins within a strongly sericitized felsic porphyritic dike. The second interval is composed of up to 4 per cent pyrite-tourmaline stringer and quartz-carbonate vein within a sericite, fuchsite, chlorite and carbonate altered andesite.
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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