Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42E11NE00002

Record: MDI42E11NE00002

General

Commodities

Primary Commodities: Gold

Secondary Commodities: Zinc, Silver

Location

Township or Area: Lindsley

Latitude: 49° 42' 35.14"    Longitude: -87° 6' 32.77"

UTM Zone: 16    Easting: 492134   Northing: 5506366.99    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 42E11NE

Point Location Description: Minesite

Location Method: AMIS Site Visit

Access Description: The mine is located in the eastern portion of Lindsley Township. The mine site is accessible by travelling approximately 14 km west of the turnoff to Geraldton along the Trans Canada Highway 11. The mine is located 0.9 km northeast of the highway.

Exploration History

1934: Property on which the shaft was later sunk was staked for Ailie Kay. The Jellicoe Gold Mining Company was incorporated. Surface exploration conducted. 1936: Jellicoe Consolidated Gold Mines Ltd. took over the property from the Jellicoe Gold Mining Company. Surface exploration and 4,391.6 m of diamond-drilling performed. 1937: 4142.8 m of diamond-drilling performed; three compartment vertical shaft sunk. Underground development commenced; plant and camp built. 1938-1939: Jellicoe Mines Ltd. was incorporated to take over the interests of Jellicoe Consolidated Gold Mines Ltd., Greenbank Gold Mining Company Ltd, Whitehorse Gold Mining Company Ltd., and Nipilac Goldfields Ltd. Underground development continued. 1940: The entire orebody, totalling 14,722 tons, was mined out. 1948: Cleanup resulted in minimal production. 1963: Jellico Mines changed its name to Jelex Mines Ltd. 1974: Mag and VLF surveys conducted in the vicinity of the shaft. Diamond-drilling was also done. 1978: Jelex Mines changed its name to Key Lake Exploration s Ltd. 1982: Key Lake Explorations optioned the property to Dome Exploration Canada Ltd (later PDI). Linecutting completed; mag survey conducted; 36 holes drilled (5,890.6 m). 1983: Diamond-drilling by Dome Exploration totalled 3,048 m in 22 holes. 1984: Diamond-drilling amounted to 914 .4 m in at least 6 holes. 1985: Dome drilled 5 holes totalling (914 m). 1990: Placer Dome conducted additional drilling. 1995: PDI and Key Lake optioned the property to Roxmark Mines Ltd. 1996: Cyprus Canada Inc. optioned the property from Roxmark and drilled 13 DDH totalling 2270 m. 2009: Roxmark and Ontex Resources Ltd. merged to form Goldstone Resources Inc. 2011: Goldstone drilled 8 DDH totalling 3190 m. Premier Gold acquired Goldstone in August.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Belt: Beardmore-Geraldton

Geological Age: Archean  

Geology Comments

Dec 07, 2005 (B Nelson) - As the entire property is overburden covered, interpretation of the geology is dependent on information from the diamond-drill holes and the underground work. In general, the deposit lies within an elongated trough of metasediments and metavolcanics bordered by younger granitic batholiths. 1.5 to 3 m wide dykes of quartz-feldspar porphyry and narrower diorite dykes intrude conformably and nonconformably, as do quartz veinlets and stringers. A steeply dipping right-hand fault cutting across the property with a northerly strike offsets the formations by about 700 m. The 91.5 m wide arkose horizon, which is closely associated with the auriferous veins, contains interbedded lenses of wacke and shale and is intruded by numerous porphyry dykes. This horizon occurs in the central portion of the property. To the north, rocks are mainly wacke with interbeds of arkose and to the sourh chloritic wacke with ironstone and minor arkosic interbeds. Several sheared and silicified zones occur throughout the property. Gold (both free and associated with sulphides) is found in dark colored quartz stringers, quartz veinlets, sheared and silicified zones of brecciated arkose, and in saddle shaped veins. The only mineable orebody found occurred as an S-shaped vein in a shear zone in the arkose horizon. The mined section had a wedge shape, about 107 m by 30.5 m by 1.5 m.

Apr 30, 2015 (Therese Pettigrew) - The Key Lake Project is located within the Beardmore-Geraldton Greenstone Belt of the Wabigoon Subprovince of the Superior Province. The project area is within the southern metasedimentary sub-belt on the southern limb of a west-plunging syncline. The mineralized zone at Key Lake is 550 to 800 m northeast of the Tombill-Bankfield Fault and diverges from it toward the west. It is about 2.5 km south of the contact with the central metavolvanic sub-belt (Lewis et al, 2013).

Lithology

Lithology Comments

Dec 07, 2005 (B Nelson) - The property is part of the south limb of a regional synclinal structure and is underlain entirely by metasediments consisting of arkose, wacke and ironstone.

Mineralization

Mineralization Comments

Dec 07, 2005 (B Nelson) - An exerpt from an article in The Northern Miner (Feb. 2, 1984, p.16) has summarized the findings to date: The 64 holes have located numerous gold bearing zones in silicified arkose and porphyry, but with an exception there are difficulties in identifying continuous mineralization. This exception, referred to as 'Area A' (approximately 457 m west of the shaft) appears to be a pipe-like mass of irregular cross section that plunges west at about 27 degrees. The strike length is about 183 m and is still open in both directions.

Apr 30, 2015 (Therese Pettigrew) - Metagreywacke is the predominant rock type in the project area and occurs in a series of turbidites. A thick section of fine to coarse-grained altered wacke has been logged as arkose and hosts most of the gold mineralization. Gold occurs in altered metagreywacke (arkose) and felsic dikes and in thin veins cutting these rocks. Gold-bearing altered rocks typically have more than trace amounts of pyrite and/or arsenopyrite. Sphalerite and silver were reported by Mason and White (1986). Accessory chalcopyrite has been identified in some holes. A variety of veins are present including quartz with angular bits of white carbonate typically along vein margins, white and gray massive quartz, and dark grey veinlets usually less than 3 mm thick composed of quartz and/or very fine grained arsenopyrite. Visible gold occurs in veins in both metagreywacke and felsic dikes but is not common and rarely occurs in wall rock. The mineralization is generally of a low grade in the north-west end and medium grade in the southeast end. It has a volcanoclastic-exhalative nature. Post-mineralization processes have concentrated the mineralization into isolated high grade patches/pockets. Infill drilling by Roxmark in 2010 and continued to identify long mineralized intervals, such as 1.6 g/t over 30 m in KL-11-109 (including 11.9 g/t over 0.3 m), and some higher grade intervals, such as 5.6 g/t over 16.1 m in KL-11-112 (including 31.6 g/t over 1.85 m) (Lewis et al., 2013).

Alteration Comments

Apr 30, 2015 (Therese Pettigrew) - Alteration occurs within and extends beyond the zone of gold mineralization. Widespread dolomite/ankerite alteration was detected by staining. Zones of greenish, brownish, and rarely yellowish sericitization are more limited and envelope all but a small fraction of the gold mineralization. Silicification is more limited still and is a very good indicator of gold mineralization. However, a significant proportion of the gold mineralization does not occur in silicified rocks (Lewis et al., 2013).

Mineral Record Details

Mineral Zones - Size and Shape

Site Visit Information

Date: Jan 03, 1997

Geologist: B Nelson

Notes: The Beardmore-Geraldton Economic Geologist visited the site in March of 1983, and on September 25, 1985.

References

Publication - Technical Report on the Mineral Resource Estimates for the Hardrock, Brookbank and Keylake Projects

Publication Number: 2013 NI 43-101 Date: 2013

Author: Lewis, W.J., Murahwi, C.Z., San Martin, A.J.

Publisher Name: Micon for Premier Gold Mines Ltd.

Location: SEDAR

Map - Little Long Lac gold area, District of Thunder Bay, Ontario

Publication Number: ARM44D Scale: 1:31,680    Date: 1997

Author: Bruce E.L.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Compilation series, Geraldton sheet, Thunder Bay and Cochrane districts

Publication Number: P0241 Scale: 1:126,720    Date: 1984

Author: Stott G.M., McConnell C.D., Mason J.K.

Publisher Name: Ontario Geological Survey

Location:

Map - Mineral deposits series, Ontario mineral potential, Longlac sheet, districts of Thunder Bay and Cochrane

Publication Number: P1527 Scale: 1:250,000    Date: 1978

Author: Springer J.S.

Publisher Name: Ontario Geological Survey

Location:

Part - Little Long Lac gold area

Publication Number: ARV44-03 Date: 1997

Author: Bruce E.L.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Tashota-Geraldton sheet, geological compilation series, Thunder Bay and Cochrane districts

Publication Number: M2102 Date: 1997

Author: Pye E.G., Harris F.R., Fenwick K.G., Baillie J.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Ontario mineral map

Publication Number: M2310 Scale: 1:1,584,000    Date: 1974

Author: Geological Branch

Publisher Name: Ontario Division of Mines

Location:

Mono - Gold occurrences, prospects, and deposits of the Beardmore-Geraldton area, districts of Thunder Bay and Cochrane

Publication Number: OFR5630 Page: 260-266  Date: 1986

Author: Mason J.K., White G.D.

Publisher Name: Ontario Geological Survey

Location:

File - Resident Geologist Mineral Deposit Files

Publication Number: Min Dep Date:

Author:

Publisher Name:

Location: Thunder Bay RGP

Map - Thunder Bay data series, Lindsley Township area, Thunder Bay District

Publication Number: P2519 Scale: 1:15,840    Date: 1982

Author: Love W.D.

Publisher Name: Ontario Geological Survey

Location:

Part - Mines of Ontario in 1943

Publication Number: ARV53-01.003 Page: Chart V in pocket  Date: 1997

Author: Tower W.O., Smith R.L., Bawden W.E., Cooper D.F., Taylor J.B., Little E.S., Weir E.B., Douglass D.P.

Publisher Name: Ontario Dept. of Mines

Location:

Part - Mines of Ontario in 1937

Publication Number: ARV47-01.003 Page: 140  Date: 1997

Author: Sinclair D.G., Tower W.O., Taylor J.B., Douglass D.P., Bayne A.S., Cave A.E., Cooper D.F., Weir E.B., Webster A.R.

Publisher Name: Ontario Dept. of Mines

Location:

Part - List of mines, quarries and works, 1938

Publication Number: ARV48-01.002 Page: 129  Date: 1997

Author: Tremblay M.

Publisher Name: Ontario Dept. of Mines

Location:

Part - Mines of Ontario in 1939

Publication Number: ARV49-01.003 Page: 134-135  Date: 1997

Author: Tower W.O., Cave A.E., Taylor J.B., Douglass D.P., Hargrave W.G., Bayne A.S., Cooper D.F., Weir E.B., Webster A.R.

Publisher Name: Ontario Dept. of Mines

Location:

Part - Mines of Ontario in 1940

Publication Number: ARV50-01.001 Page: 56-57  Date: 1997

Author: Tower W.O., Cave A.E., Taylor J.B., Little E.S., Hargrave W.G., Bayne A.S., Cooper D.F., Weir E.B., Douglass D.P.

Publisher Name: Ontario Dept. of Mines

Location:

Part - Statistical review of the mineral industry of Ontario for 1938

Publication Number: ARV48-01.001 Page: 18  Date: 1997

Author: Tremblay M.

Publisher Name: Ontario Dept. of Mines

Location:

Part - Statistical review of the mineral industry of Ontario for 1939

Publication Number: ARV49-01.001 Page: 19  Date: 1997

Author: Tremblay M.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Geological series, Precambrian geology, Lindsley Township

Publication Number: P3089 Scale: 1:15,840    Date: 1991

Author: Kresz D.U.

Publisher Name: Ontario Geological Survey

Location:

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For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office