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Osisko Mining Inc
Symbol C : OSK
Shares Issued 262,747,888
Close 2019-06-14 C$ 3.20
Recent Sedar Documents

Osisko Mining drills five m of 132 g/t Au at Windfall

2019-06-17 08:13 ET - News Release

Mr. John Burzynski reports

OSISKO INFILL DRILLING CONTINUES TO INTERSECT HIGH-GRADE AT LYNX

Osisko Mining Inc. has provided new infill drilling results from the continuing definition and expansion program at its 100-per-cent-owned Windfall gold project located in the Abitibi greenstone belt, Urban township, Eeyou Istchee James Bay, Quebec. The program is currently focused on infill drilling within the main Windfall gold deposit and the adjacent Lynx deposit (located immediately northeast of Windfall), exploration and expansion drilling on the main mineralized zones, and deep exploration in the central areas of the intrusive system. Significant new analytical results from 19 intercepts in seven drill holes and six wedges from surface focused on Lynx infill drilling are presented in the "Surface drilling" table. Additionally, 69 intercepts in 43 underground drill holes focused on five-metre infill drilling, including the pending Lynx bulk sample area, are included in the "Underground drilling" table.

Highlights from new infill drilling results at Lynx include:

  • 132 grams per tonne gold over 5.0 metres in WST-19-0117;
  • 51.0 g/t Au over 6.3 metres in OSK-W-19-909-W7;
  • 56.2 g/t Au over 4.7 metres in WST-19-0106;
  • 106 g/t Au over 2.0 metres in WST-19-0119;
  • 82.9 g/t Au over 2.3 metres in WST-19-0113;
  • 85.3 g/t Au over 2.0 metres in WST-19-0125;
  • 36.0 g/t Au over 4.1 metres in OSK-W-18-1785-W1;
  • 23.4 g/t Au over 6.3 metres in OSK-W-18-1539;
  • 63.6 g/t Au over 2.1 metres in WST-19-0137;
  • 59.3 g/t Au over 2.2 metres in WST-19-148;
  • 37.0 g/t Au over 3.5 metres in WST-19-0130;
  • 42.1 g/t Au over 3.0 metres in WST-19-0093.

Maps showing hole locations and full analytical results are available at the company's website.

                                     SURFACE DRILLING
 
                       From        To     Int.              Au           Au (g/t)
Hole No.                 (m)       (m)      (m)    (g/t) uncut    cut to 100 g/t          Area      Zone

OSK-W-18-1539         910.7     917.0      6.3            23.4                            Lynx      Lynx
including             910.7     911.2      0.5            71.5
including             914.2     915.2      1.0            88.9
OSK-W-18-1785-W1      258.9     263.0      4.1            36.0              22.6      Lynx_305      Lynx
including             258.9     259.5      0.6             192               100
                      275.0     277.3      2.3            27.4                        Lynx_310      Lynx
OSK-W-19-1181-W5      991.7     993.9      2.2            19.6                        Lynx_317      Lynx
including             993.4     993.9      0.5            74.2
                      997.2     999.2      2.0            6.50                          Lynx 4      Lynx
including             998.2     999.2      1.0            12.2
                    1,005.0   1,009.7      4.7            13.4                        Lynx_330      Lynx
including           1,006.2   1,007.0      0.8            47.7
OSK-W-19-1181-W8      879.8     882.0      2.2            20.5                        Lynx_324      Lynx
including             879.8     880.4      0.6            54.2
OSK-W-19-1850         141.8     144.8      3.0            16.8                        Lynx_304      Lynx
including             141.8     142.1      0.3            99.8
OSK-W-19-1852         154.7     156.8      2.1            13.7                        Lynx_305      Lynx
including             155.4     156.1      0.7            35.9
OSK-W-19-1855         301.0     303.0      2.0            4.67                        Lynx_305      Lynx
OSK-W-19-1857-W1    1,230.8   1,233.3      2.5            3.94                        Lynx_313      Lynx
                    1,235.4   1,237.6      2.2            3.31                        Lynx_313      Lynx
OSK-W-19-1860         287.7     290.5      2.8            6.39                        Lynx_305      Lynx
including             287.7     288.6      0.9            17.1
                      294.5     298.4      3.9            13.0                        Lynx_305      Lynx
including             297.0     297.7      0.7            42.4
OSK-W-19-1915         585.0     587.1      2.1            7.84                            Lynx      Lynx
including             585.0     585.4      0.4            40.7
OSK-W-19-1939         253.6     255.8      2.2            4.47                         Lynx HW      Lynx
OSK-W-19-909-W7       976.7     983.0      6.3            51.0                18      Lynx_313      Lynx
including             982.0     982.6      0.6             447               100
                      985.0     987.1      2.1            14.3                        Lynx_313      Lynx
OSK-W-19-961-W1     1,075.0   1,077.0      2.0            5.11                        Lynx_312      Lynx


                   UNDERGROUND DRILLING
 
                 From       To     Int.               Au             Au (g/t)
Hole No.           (m)      (m)      (m)     (g/t) uncut      cut to 100 g/t          Area       Zone

WST-19-0089      75.4     77.6      2.2             4.05                          Lynx_311       Lynx
including        75.4     76.0      0.6             10.9
WST-19-0090      85.0     87.4      2.4             5.23                          Lynx_311       Lynx
including        85.7     86.5      0.8             15.3
WST-19-0091      85.5     89.8      4.3             21.5                17.5      Lynx_311       Lynx
including        85.5     86.1      0.6              129                 100
WST-19-0092      87.0     89.0      2.0             3.33                          Lynx_311       Lynx
including        88.1     88.4      0.3             17.5
WST-19-0093      86.3     89.3      3.0             42.1                          Lynx_308       Lynx
WST-19-0097      65.9     68.0      2.1             14.2                          Lynx_311       Lynx
including        65.9     66.5      0.6             46.3
WST-19-0098      66.0     68.7      2.7             38.7                25.6      Lynx_311       Lynx
including        66.6     67.2      0.6              159                 100
WST-19-0099      76.5     78.5      2.0             28.5                15.7      Lynx_311       Lynx
including        77.9     78.2      0.3              185                 100
WST-19-0100      69.4     72.5      3.1             34.1                18.6      Lynx_311       Lynx
including        72.2     72.5      0.3              260                 100
WST-19-0101      73.0     75.0      2.0             7.66                          Lynx_311       Lynx
including        74.0     74.3      0.3             47.9
WST-19-0102      65.6     68.1      2.5             6.12                          Lynx_311       Lynx
including        66.2     66.5      0.3             48.7
WST-19-0106      65.0     68.0      3.0             10.2                          Lynx_311       Lynx
including        66.8     67.3      0.5             36.9
                108.7    111.0      2.3             5.04                          Lynx_310       Lynx
including       109.8    110.1      0.3             33.0
                126.0    130.7      4.7             56.2                10.4      Lynx_304       Lynx
including       126.6    127.0      0.4              639                 100
WST-19-0107      66.0     68.6      2.6             9.94                          Lynx_311       Lynx
including        67.8     68.6      0.8             25.8
WST-19-0108      67.1     69.4      2.3             22.5                          Lynx_311       Lynx
including        67.6     68.5      0.9             54.7
WST-19-0111      70.4     72.5      2.1             13.3                          Lynx_311       Lynx
including        71.8     72.5      0.7             37.8
WST-19-0112      70.8     73.1      2.3             16.0                          Lynx_311       Lynx
WST-19-0113      75.4     77.7      2.3             82.9                20.7      Lynx_311       Lynx
including        75.4     75.8      0.4              458                 100
WST-19-0114      71.0     73.3      2.3             5.89                          Lynx_311       Lynx
including        71.7     72.4      0.7             18.3
WST-19-0115      72.4     74.8      2.4             17.1                          Lynx_311       Lynx
including        73.0     73.6      0.6             68.1
WST-19-0116      87.6     91.1      3.5             26.9                12.6          Lynx       Lynx
including        89.0     89.3      0.3              267                 100
                 99.0    104.2      5.2             3.91                          Lynx_310       Lynx
including       103.6    104.2      0.6             19.6
WST-19-0117      84.5     89.5      5.0              132                34.2      Lynx_308       Lynx
including        85.5     86.0      0.5              922                 100
WST-19-0118      44.0     47.0      3.0             18.0                          Lynx_311       Lynx
including        46.4     47.0      0.6             81.9
WST-19-0119      55.7     57.9      2.2             3.94                          Lynx_311       Lynx
including        56.4     56.9      0.5             16.6
                 87.0     89.0      2.0              106                25.2      Lynx_310       Lynx
including        88.5     89.0      0.5              425                 100
                 97.6     99.7      2.1             4.09                              Lynx       Lynx
WST-19-0120      59.2     63.2      4.0             7.34                          Lynx_311       Lynx
including        59.2     59.9      0.7             29.7
                128.3    130.7      2.4             10.5                          Lynx_304       Lynx
WST-19-0121      54.4     58.0      3.6             8.66                          Lynx_308       Lynx
WST-19-0122      44.0     46.0      2.0             32.9                15.3      Lynx_311       Lynx
including        44.8     45.1      0.3              217                 100
                 55.0     57.0      2.0             50.8                26.2      Lynx_308       Lynx
including        55.8     56.3      0.5              199                 100
WST-19-0123      58.5     61.2      2.7             3.51                          Lynx_308       Lynx
including        60.6     61.2      0.6             9.03
WST-19-0125      47.0     49.0      2.0             85.3                31.1      Lynx_311       Lynx
including        47.5     48.0      0.5              317                 100
                 60.0     62.0      2.0             7.36                          Lynx_308       Lynx
WST-19-0126      42.0     44.0      2.0             6.60                              Lynx       Lynx
including        42.9     43.5      0.6             21.2
                 50.0     52.5      2.5             11.7                          Lynx_311       Lynx
including        50.4     50.8      0.4             72.2
WST-19-0128      51.4     54.4      3.0             10.7                          Lynx_311       Lynx
including        54.1     54.4      0.3             80.2
WST-19-0129      60.5     62.6      2.1             4.59                          Lynx_311       Lynx
including        62.3     62.6      0.3             30.7
WST-19-0130      50.8     54.3      3.5             37.0                24.3      Lynx_311       Lynx
including        53.6     54.3      0.7              164                 100
WST-19-0132      72.1     74.1      2.0             27.3                          Lynx_310       Lynx
including        72.1     73.1      1.0             54.2
                 78.5     80.7      2.2             3.03                              Lynx       Lynx
                104.6    107.3      2.7             6.68                          Lynx_304       Lynx
including       106.0    106.5      0.5             19.8
                122.0    124.0      2.0             4.17                              Lynx       Lynx
including       123.5    124.0      0.5             14.2
WST-19-0133      45.0     47.4      2.4             16.2                              Lynx       Lynx
including        45.0     45.4      0.4             86.0
                 67.2     69.3      2.1             4.63                              Lynx       Lynx
including        68.2     68.5      0.3             30.7
WST-19-0136      41.1     45.1      4.0             8.51                          Lynx_308       Lynx
                 46.0     48.0      2.0             4.21                          Lynx_308       Lynx
                 67.7     69.8      2.1             15.9                          Lynx_310       Lynx
                 94.8    102.2      7.4             5.98                          Lynx_304       Lynx
including        95.5     95.8      0.3             34.6
WST-19-0137      50.4     56.3      5.9             17.5                16.0      Lynx_308       Lynx
including        52.4     53.0      0.6             51.8
including        55.9     56.3      0.4              124                 100
                107.0    109.1      2.1             63.6                50.1      Lynx_304       Lynx
WST-19-0139      52.2     54.6      2.4             4.08                          Lynx_308       Lynx
WST-19-0141      53.0     55.4      2.4             3.91                          Lynx_308       Lynx
including        53.7     54.4      0.7             11.8
                 59.0     61.1      2.1             10.9                          Lynx_308       Lynx
including        59.0     59.3      0.3             73.7
                 88.4     90.5      2.1             18.4                          Lynx_305       Lynx
                103.2    105.4      2.2             5.89                          Lynx_304       Lynx
including       105.1    105.4      0.3             42.7
WST-19-0142A    103.0    105.0      2.0             5.92                          Lynx_305       Lynx
including       103.6    103.9      0.3             38.4
WST-19-0143      69.7     71.8      2.1             16.1                          Lynx_308       Lynx
including        69.7     70.4      0.7             48.2
                 81.0     83.0      2.0             4.85                              Lynx       Lynx
including        81.7     82.1      0.4             23.3
                117.5    119.7      2.2             3.27                          Lynx_304       Lynx
WST-19-0148      55.5     57.6      2.1             10.5                          Lynx_311       Lynx
including        56.8     57.2      0.4             51.7
                 77.8     80.1      2.3             11.6                              Lynx       Lynx
including        79.7     80.1      0.4             35.4
                112.0    114.2      2.2             59.3                41.8      Lynx_305       Lynx
including       112.0    112.7      0.7              155                 100
                118.8    121.2      2.4             6.31                          Lynx_304       Lynx
including       120.5    121.2      0.7             18.6
WST-19-0149      76.0     78.4      2.4             4.03                          Lynx_310       Lynx
WST-19-0155      51.0     53.3      2.3             5.60                          Lynx_311       Lynx
                 67.0     69.0      2.0             13.8                              Lynx       Lynx
including        68.0     69.0      1.0             27.3

Notes:  True widths are estimated at 55 to 80 per cent of the reported core length interval. See 
        quality control and reporting protocols. 

OSK-W-18-1539 intersected 23.4 g/t Au over 6.3 metres. Mineralization is composed of local visible gold, up to 20 per cent disseminated pyrite, up to 10 per cent disseminated sphalerite, 3 per cent chalcopyrite, 3 per cent molybdenite and traces of arsenopyrite within a moderate silica, sericite and fuchsite altered rhyolite.

OSK-W-18-1785-W1 intersected two intervals: 36.0 g/t Au over 4.1 metres and 27.4 g/t Au over 2.3 metres. The first interval contains local visible gold, up to 15 per cent finely disseminated pyrite, up to 1.5 per cent sphalerite within pervasive silica flooding with quartz-tourmaline veins. The mineralization is at the contact between a moderate fuchsite and sericite altered rhyolite and a felsic porphyritic dike. The second interval contains local visible gold, up to 15 per cent finely disseminated pyrite, trace sphalerite and pyrite tourmaline stringers within a strong silica and moderate sericite altered felsic porphyritic dike.

OSK-W-19-1181-W5 intersected three intervals: 19.6 g/t Au over 2.2 metres, 6.50 g/t Au over 2.0 metres and 13.4 g/t Au over 4.7 metres. The first interval contains up to 3 per cent stringer, clustered, and disseminated pyrite and quartz-tourmaline veins at the contact between a moderate sericite altered gabbro and a moderate fuchsite and sericite altered rhyolite. The second interval contains 1 per cent pyrite in clusters and stringers within a strong sericite altered rhyolite. The last interval is composed of up to 5 per cent pyrite clusters within a moderate sericite altered rhyolite.

OSK-W-19-1181-W8 intersected 20.5 g/t Au over 2.2 metres. The mineralization is composed of 4 per cent pyrite stringers with a tourmaline breccia and quartz-carbonate veins hosted in a moderate chlorite and weak fuchsite altered rhyolite.

OSK-W-19-1850 intersected 16.8 g/t Au over 3.0 metres. The mineralization is composed of up to 2 per cent pyrite stringers within a strong chlorite and moderate carbonate altered gabbro.

OSK-W-19-1852 intersected 13.7 g/t Au over 2.1 metres. The mineralization is composed of up to 5 per cent disseminated, clustered and stringer pyrite, and trace sphalerite with pervasive silica flooding hosted in a moderate sericite altered rhyolite.

OSK-W-19-1855 intersected 4.67 g/t Au over 2.0 metres. The mineralization is composed of 2 per cent disseminated pyrite and tourmaline ptygmatic veins within a strong silica altered felsic fragmental intrusion.

OSK-W-19-1857-W1 intersected two intervals: 3.94 g/t Au over 2.5 metres and 3.31 g/t Au over 2.2 metres. The two intervals contain up to 7 per cent pyrite stringers and clusters, quartz-tourmaline veins and trace chalcopyrite at the contact between a moderate silica and weak sericite altered rhyolite with a strong sericite altered gabbro. Both units have weak fuchsite alteration.

OSK-W-19-1860 intersected two intervals: 6.39 g/t Au over 2.8 metres and 13.0 g/t Au over 3.9 metres. The first interval contains up to 3 per cent disseminated pyrite and quartz-tourmaline veins hosted in a moderate silica and sericite altered felsic fragmental intrusion. The second interval contains up to 4 per cent finely disseminated pyrite, smoky quartz veins and local visible gold within a strong silica and weak sericite altered rhyolite.

OSK-W-19-1915 intersected 7.84 g/t Au over 2.1 metres. The mineralization is composed of local visible gold with pervasive silica flooding, 2 per cent pyrite stringers and clusters hosted in a weak sericite and carbonate altered felsic fragmental intrusion.

OSK-W-19-1939 intersected 4.47 g/t Au over 2.2 metres. The mineralization is composed of 3 per cent pyrite stringers and clusters hosted in a moderate sericite and weak silica altered felsic intrusion.

OSK-W-19-909-W7 intersect two intervals: 51.0 g/t Au over 6.3 metres and 14.3 g/t Au over 2.1 metres. The first interval contains local visible gold and electrum with pervasive silica flooding, 20 per cent pyrite clusters, trace chalcopyrite and smoky quartz veins hosted at the contact between a strong silica altered rhyolite and a felsic porphyritic intrusion. The second interval contains 1 per cent pyrite stringers within a strong silica, strong sericite and weak fuchsite altered felsic porphyritic dike.

OSK-W-19-961-W1 intersected 5.11 g/t Au over 2.0 metres. The mineralization is composed of 5 per cent pyrites clusters and smoky quartz veins within a silica altered rhyolite.

WST-19-0089 intersected 4.05 g/t Au over 2.2 metres. The mineralization is composed of 1 per cent pyrite stringer and 2 per cent disseminated pyrite within a moderate silica and sericite altered rhyolite. WST-19-0089 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0090 intersected 5.23 g/t Au over 2.4 metres. The mineralization includes 1 per cent pyrite stringers and 2 per cent disseminated pyrite within a moderate silica and sericite altered rhyolite. WST-19-0090 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0091 intersected 21.5 g/t Au over 4.3 metres. The mineralization is composed of local visible gold, 2 per cent pyrite stringers and 15 per cent sphalerite hosted in sericite, silica and fuchsite altered rhyolite. WST-19-0091 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0092 intersected 3.33 g/t Au over 2.0 metres. The mineralization is composed of 1 per cent pyrite stringers with pervasive silica flooding within a moderate sericite and silica altered rhyolite. WST-19-0092 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0093 intersected 42.1 g/t Au over 3.0 metres. The mineralization is composed of local visible gold in fracture filling, up to 2 per cent pyrite stringers with pervasive silica flooding, hosted in a moderate silica and weak fuchsite altered felsic fragmental intrusion. WST-19-0093 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0097 intersected 14.2 g/t Au over 2.1 metres. The mineralization is composed of trace pyrite stringers and clusters within a weak silica and sericite altered rhyolite. WST-19-0097 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0098 intersected 38.7 g/t Au over 2.7 metres. The mineralization is composed of local visible gold, up to 3 per cent disseminated and stringer pyrite, and trace chalcopyrite and sphalerite hosted in a moderate fuchsite and silica altered rhyolite. WST-19-0098 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0099 intersected 28.5 g/t Au over 2.0 metres. The mineralization is composed of local visible gold, 1 per cent disseminated pyrite and trace chalcopyrite with pervasive silica flooding hosted in a moderate sericite and silica altered rhyolite. WST-19-0099 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0100 intersected 34.1 g/t Au over 3.1 metres. The mineralization is composed of local visible gold, 1 per cent pyrite stringers and clusters with pervasive silica flooding hosted in a weak silica and sericite altered rhyolite. WST-19-0100 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0101 intersected 7.66 g/t Au over 2.0 metres. The mineralization is composed of 2 per cent pyrite-tourmaline stringers, 1 per cent pyrite clusters and trace chalcopyrite within pervasive silica flooding and hosted in a weak silica and sericite altered rhyolite. WST-19-0101 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0102 intersected 6.12 g/t Au over 2.5 metres. The mineralization is composed of 2 per cent pyrite clusters and 1 per cent pyrite-tourmaline stringers hosted at the contact between a weak silica and sericite altered rhyolite and a weak sericite altered felsic porphyritic intrusion. WST-19-0102 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0106 intersected three intervals: 10.2 g/t Au over 3.0 metres, 5.04 g/t Au over 2.3 metres and 56.2 g/t Au over 4.7 metres. The first interval is composed of up to 5 per cent disseminated, clustered and stringer pyrite associated with pervasive silica flooding hosted in a sericitized felsic porphyritic intrusion. The second interval contains trace disseminated and clustered pyrite within a moderate sericite and weak silica altered rhyolite. The last interval contains local visible gold, 3 per cent pyrite clusters, trace sphalerite and chalcopyrite associated with pervasive silica flooding hosted in a moderate silica and sericite altered felsic porphyritic intrusion. WST-19-0106 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0107 intersected 9.94 g/t Au over 2.6 metres. The mineralization is composed of up to 3 per cent pyrite clusters and stringers, traces sphalerite with pervasive silica flooding hosted in a moderate sericite altered rhyolite. WST-19-0107 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0108 intersected 22.5 g/t Au over 2.3 metres. The mineralization is composed of up to 5 per cent pyrite-tourmaline stringers and clusters hosted in a weak sericite and silica altered rhyolite. WST-19-0108 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0111 intersected 13.3 g/t Au over 2.1 metres. The mineralization is composed of local visible gold, 1 per cent disseminated pyrite with pervasive silica flooding hosted in a moderate silica and fuchsite altered felsic porphyritic intrusion. WST-19-0111 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0112 intersected 16.0 g/t Au over 2.3 metres. The mineralization is composed of 7 per cent pyrite clusters with pervasive silica flooding hosted at the contact between a felsic porphyritic intrusion and a rhyolite. WST-19-0112 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0113 intersected 82.9 g/t Au over 2.3 metres. The mineralization is composed of local visible gold, 3 per cent pyrite clusters and stringers with trace sphalerite in pervasive silica flooding hosted in a moderate sericite altered rhyolite. WST-19-0113 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0114 intersected 5.89 g/t Au over 2.3 metres. The mineralization is composed of up to 5 per cent finely disseminated pyrite with pervasive silica flooding hosted in weak fuchsite, sericite and silica altered rhyolite. WST-19-0114 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0115 intersected 17.1 g/t Au over 2.4 metres. The mineralization is composed of up to 5 per cent finely disseminated and clustered pyrite hosted in a moderate silica, and weak sericite and fuchsite altered rhyolite. WST-19-0115 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0116 intersected 26.9 g/t Au over 3.5 metres and 3.91 g/t Au over 5.2 metres. The first interval contains 3 per cent pyrite clusters and stringers with pervasive silica flooding hosted in a moderate sericite altered rhyolite. The second interval contains trace disseminated, clustered and stringer pyrite within a moderate sericite and weak silica altered rhyolite. WST-19-0115 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0117 intersected 132 g/t Au over 5.0 metres. The mineralization is composed of local visible gold, 2 per cent pyrite stringers and clusters, traces chalcopyrite and quartz-tourmaline veins hosted in a weak sericitized and silica altered felsic intrusion. WST-19-0117 was drilled from underground drill station RA-180-190-E located 180 metres below surface from Section 3450E.

WST-19-0118 intersected 18.0 g/t Au over 3.0 metres. The mineralization is composed of up to 10 per cent pyrite stringers and clusters and 1 per cent sphalerite in fracture filling at the contact between a sericite altered felsic intrusion and a sericite altered rhyolite. WST-19-0118 was drilled from underground drill station RE-195-265-O located 195 metres below surface from Section 3475E.

WST-19-0119 intersected 3.94 g/t Au over 2.2 metres, 106 g/t Au over 2.0 metres and 4.09 g/t Au over 2.1 metres. The first interval contains up to 30 per cent fine disseminated, clustered and stringer pyrite with quartz-tourmaline veins hosted in a moderate sericite altered rhyolite. The second and third intervals contains local visible gold, 1 per cent fine disseminated pyrite and quartz-carbonate veins hosted in a weak sericite and silica altered rhyolite. WST-19-0119 was drilled from underground drill station RE-195-265-O located 195 metres below surface from Section 3475E.

WST-19-0120 intersected 7.34 g/t Au over 4.0 metres and 10.5 g/t Au over 2.4 metres. The first interval contains up to 3 per cent disseminated and clustered pyrite, trace sphalerite and tourmaline ptygmatic veins within a weak fuchsite and moderate sericite altered rhyolite. WST-19-0120 was drilled from underground drill station RE-195-265-O located 195 metres below surface from Section 3475E.

WST-19-0121 intersected 8.66 g/t Au over 3.6 metres. The mineralization is composed of up to 3 per cent disseminated and stringer pyrite and up to 10 per cent quartz-tourmaline ptygmatic veins within a sericite altered felsic intrusion. WST-19-0121 was drilled from underground drill station RE-195-265-O located 195 metres below surface from Section 3475E.

WST-19-0122 intersected 32.9 g/t Au over 2.0 metres and 50.8 g/t Au over 2.0 metres. The first interval contains up to 20 per cent finely disseminated pyrite with pervasive silica flooding hosted in a moderate sericite and strong silica altered rhyolite. The second interval is composed of 10 per cent pyrite stringers and smoky quartz veins within a moderate sericite altered rhyolite. WST-19-0122 was drilled from underground drill station RE-195-265-O located 195 metres below surface from Section 3475E.

WST-19-0123 intersected 3.51 g/t Au over 2.7 metres. The mineralization is composed of 3 per cent pyrite stingers and clusters with pervasive silica flooding hosted in a strong silica and sericite altered rhyolite. WST-19-0123 was drilled from underground drill station RE-195-265-O located 195 metres below surface from Section 3475E.

WST-19-0125 intersected 85.3 g/t Au over 2.0 metres and 7.36 g/t Au over 2.0 metres. The first interval contains local visible gold and up to 10 per cent finely disseminated pyrite with pervasive silica flooding hosted in a strong fuchsite and silica altered rhyolite. The second interval is composed of 20 per cent finely disseminated pyrite within a strong sericite, silica and a moderate fuchsite altered rhyolite. WST-19-0125 was drilled from underground drill station RE-195-265-O located 195 metres below surface from Section 3475E.

WST-19-0126 intersected 6.60 g/t Au over 2.0 metres and 11.7 g/t Au over 2.5 metres. The first interval contains 4 per cent disseminated and clustered pyrite hosted in a weak sericite and silica altered rhyolite. The second interval contains local visible gold, 4 per cent pyrite tourmaline veins, up to 20 per cent finely disseminated pyrite and trace sphalerite hosted in a moderate silica and weak sericite altered rhyolite. WST-19-0126 was drilled from underground drill station RE-195-265-O located 195 metres below surface from Section 3475E.

WST-19-0128 intersected 10.7 g/t Au over 3.0 metres. The mineralization is composed of up to 3 per cent pyrite clusters and stringers with pervasive silica flooding and quartz-carbonate veins hosted in a weak silica and sericite altered rhyolite. WST-19-0128 was drilled from underground drill station RE-195-265-O located 195 metres below surface from Section 3475E.

WST-19-0129 intersected 4.59 g/t Au over 2.1 metres. The mineralization is composed of 1 per cent pyrite clusters within a weak silica altered rhyolite. WST-19-0129 was drilled from underground drill station RE-195-265-O located 195 metres below surface from Section 3475E.

WST-19-0130 intersected 37.0 g/t Au over 3.5 metres. The mineralization is composed of up to 3 per cent pyrite clusters and local visible gold with pervasive silica flooding and trace sphalerite hosted in strong silica and fuchsite altered rhyolite. WST-19-0130 was drilled from underground drill station RE-195-265-O located 195 metres below surface from Section 3475E.

WST-19-0132 intersected four intervals: 27.3 g/t Au over 2.0 metres, 3.03 g/t Au over 2.2 metres, 6.68 g/t Au over 2.7 metres and 4.17 g/t Au over 2.0 metres. The first interval contains 1 per cent pyrite clusters within a weak sericite altered felsic fragmental intrusion. The second interval contains 2 per cent pyrite clusters with pervasive silica flooding and up to 20 per cent quartz-tourmaline ptygmatic veins within a sericitized felsic fragmental intrusion. The third interval is composed of 2 per cent pyrite clusters hosted in a strong silica and weak sericite altered rhyolite. The last interval contains 1 per cent pyrite clusters with 15 per cent smoky quartz veins hosted in a strong sericite and silica altered rhyolite. WST-19-0128 was drilled from underground drill station RE-195-265-O located 195 metres below surface from Section 3475E.

WST-19-0133 intersected 16.2 g/t Au over 2.4 metres and 4.63 g/t Au over 2.1 metres. The first interval contains 2 per cent pyrite clusters within a moderate sericite altered felsic fragmental intrusion. The second interval is composed of 3 per cent disseminated pyrite with pervasive silica flooding within a weak sericite altered felsic fragmental intrusion. WST-19-0133 was drilled from underground drill station RE-195-265-O located 195 metres below surface from Section 3475E.

WST-19-0136 intersected four intervals: 8.51 g/t Au over 4.0 metres, 4.21 g/t Au over 2.0 metres, 15.9 g/t Au over 2.1 metres and 5.98 g/t Au over 7.4 metres. The first interval contains up to 5 per cent disseminated pyrite, traces of sphalerite and smoky quartz veins within a weak silica and sericite altered felsic fragmental intrusion. The second interval contains 2 per cent pyrite stringers hosted in a moderate silica altered felsic intrusion. The third interval is composed of 5 per cent disseminated pyrite with pervasive silica flooding, local visible gold and quartz-tourmaline veins within a moderate silica and sericite altered felsic intrusion. The last interval contains local visible gold, 10 per cent pyrite and smoky quartz veins hosted in a moderate sericite and silica altered felsic porphyritic intrusion. WST-19-0136 was drilled from underground drill station AN-195-265-S located 195 metres below surface from Section 3500E.

WST-19-0137 intersected two intervals: 17.5 g/t Au over 5.9 metres and 63.6 g/t Au over 2.1 metres. The first interval contains local visible gold, 1 per cent disseminated and stringer pyrite within a moderate sericite and silica altered felsic fragmental intrusion. The second interval contains local visible gold and electrum, 4 per cent finely disseminated pyrite and trace chalcopyrite within a fuchsite, silica and sericite altered rhyolite. WST-19-0137 was drilled from underground drill station AN-195-265-S located 195 metres below surface from Section 3500E.

WST-19-0139 intersected 4.08 g/t Au over 2.4 metres. The mineralization is composed of 5 per cent disseminated pyrite with pervasive silica flooding within a moderate fuchsite, sericite and silica altered felsic intrusion. WST-19-0139 was drilled from underground drill station AN-195-265-S located 195 metres below surface from Section 3500E.

WST-19-0141 intersected four intervals: 3.91 g/t Au over 2.4 metres, 10.9 g/t Au over 2.1 metres, 18.4 g/t Au over 2.1 metres and 5.89 g/t Au over 2.2 metres. The first interval contains trace pyrite stringers within a moderate sericite altered rhyolite. The second interval contains local visible gold, 3 per cent finely disseminated pyrite and quartz-tourmaline veins hosted in a sericite altered rhyolite. The third interval contains up to 5 per cent finely disseminated and clustered pyrite hosted in a moderate silica altered rhyolite. The last interval is composed of 4 per cent finely disseminated pyrite with pervasive silica flooding within a moderate sericite and silica altered rhyolite. WST-19-0141 was drilled from underground drill station AN-195-265-S located 195 metres below surface from Section 3500E.

WST-19-0142A intersected 5.92 g/t Au over 2.0 metres. The mineralization is composed of 5 per cent disseminated pyrite and ptygmatic tourmaline veins within a strong silica altered rhyolite. WST-19-0142A was drilled from underground drill station AN-195-265-S located 195 metres below surface from Section 3500E.

WST-19-0143 intersected three intervals: 16.1 g/t Au over 2.1 metres, 4.85 g/t Au over 2.0 metres and 3.27 g/t Au over 2.2 metres. The first interval contains local visible gold, trace pyrite clusters with pervasive silica flooding hosted in a moderate silica and sericite altered rhyolite. The second interval contain local visible gold with quartz-carbonate veins hosted in a moderate sericite altered rhyolite. The last interval contains 2 per cent disseminated pyrite and quartz-carbonate veins hosted in a sericitized felsic fragmental intrusion. WST-19-0143 was drilled from underground drill station AN-195-265-S located 195 metres below surface from Section 3500E.

WST-19-0148 intersected four intervals: 10.5 g/t Au over 2.1 metres, 11.6 g/t Au over 2.3 metres, 59.3 g/t Au over 2.2 metres and 6.31 g/t Au over 2.4 metres. The first interval contains up to 2 per cent pyrite stringers and ptygmatic tourmaline veins within a moderate sericite altered rhyolite. The second interval is composed of 4 per cent disseminated, clustered, and stringer pyrite with pervasive silica flooding, quartz-tourmaline veins and trace sphalerite within a moderate sericite altered rhyolite. The third interval contains local visible gold, up to 9 per cent disseminated and stringer pyrite and up to 3 per cent sphalerite hosted in a strong fuchsite and silica altered rhyolite. The last interval contains up to 5 per cent pyrite stringers and ptygmatic quartz-tourmaline veins at the contact between a felsic intrusion and a rhyolite. WST-19-0148 was drilled from underground drill station AN-195-265-S located 195 metres below surface from Section 3500E.

WST-19-0149 intersected 4.03 g/t Au over 2.4 metres. The mineralization is composed of up to 1 per cent pyrite stringers and clusters, and 3 per cent quartz-carbonate veins hosted in a weak sericite altered rhyolite. WST-19-0149 was drilled from underground drill station RE-195-265-O located 195 metres below surface from Section 3475E.

WST-19-0155 intersected 5.60 g/t Au over 2.3 metres and 13.8 g/t Au over 2.0 metres. The first interval contains 3 per cent pyrite stringers with pervasive silica flooding and quartz-carbonate veins within a strong silica altered rhyolite. The second interval contains 1 per cent pyrite stringers within a week silica altered rhyolite. WST-19-0155 was drilled from underground drill station AN-195-265-S located 195 metres below surface from Section 3500E.

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 Osisko's 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 width determination is estimated at 55 to 80 per cent 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 one-kilogram screen fire assay or standard 50-gram fire-assaying-AA finish or gravimetric finish at (i) ALS Laboratories in Val d'Or, Que., Thunder Bay, Ont., Sudbury, Ont., or Vancouver, B.C., or (ii) 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 is performed by qualified persons employing a QA/QC program consistent with National Instrument 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 Osisko, as disclosed in the Windfall Lake technical report (as defined below) and Nov. 27, 2018, Lynx resource update, comprises 2,874,000 tonnes at 8.17 g/t Au (754,000 ounces) in the indicated mineral resource category and 10,352,000 tonnes at 7.11 g/t Au (2,366,000 ounces) in the inferred mineral resource category. For details regarding the key assumptions, parameters and methods used to estimate the mineral resources presented in respect of the Windfall Lake gold project, please see the technical report entitled "Technical Report and Mineral Resource Estimate for the Windfall Lake Project, Windfall Lake and Urban-Barry Properties" and dated June 12, 2018 (effective date of May 14, 2018), which has been prepared by InnovExplo Inc. from Val d'Or, Que., and the press release "Osisko releases mineral resource update for Lynx" dated Nov. 27, 2018, which has been prepared by Osisko and reviewed and approved by Micon International Ltd. from Toronto, Ont. The Windfall Lake technical report and press release are available on Osisko's website and on SEDAR under Osisko's issuer profile. The Windfall Lake gold deposit is currently one of the highest-grade resource-stage gold projects in Canada. Mineralization occurs in four principal zones: Lynx, Zone 27, Caribou and Underdog. All zones comprise sub-vertical lenses following intrusive porphyry contacts plunging to the northeast. The deposit is well defined from surface to a depth of 900 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-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 the Urban Barry area and nearby Quevillon area (over 2,700 square kilometres).

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