Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52O07SE00002

Record: MDI52O07SE00002

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Caley Lake Area

Latitude: 51° 15' 6.13"    Longitude: -90° 32' 49.76"

UTM Zone: 15    Easting: 671170.95   Northing: 5680674.09    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52O07SE

Point Location Description: Trenches and diamond-drill holes.

Location Method: Conversion from MDI

Access Description: The A zone of the Koval-Ohman deposit is located approximately 34 km southwest of Pickle Lake. The A zone is located about 850 m south of Bancroft Lake (aka Ben Lake) and about 2.4 km northeast of Matapesatakun Bay of Lake St. Joseph. Bancroft Lake to the north of the deposit and Matapesatakun Bay, to the southwest of the deposit, are suitable for float- and ski-equipped aircraft. Bancroft Lake is shallow with a soft, organic sediment bottom. It is not suitable for large aircraft. There is an old campsite on the south shore of Bancroft Lake. A network of diamond-drill roads lead south to the deposit area from the campsite.

Exploration History

August 1953: B. Ohman discovered interesting mineralization south of Bancroft Lake, then submitted some samples to Hasaga Gold Mines Ltd., for assay. Hasaga geologists visited the property and took channel and chip samples. Values of $6.58 over 31.25 feet and $25.85 over 8.5 feet (gold at 34.42 per ounce) were returned. Hasaga Gold Mines Ltd. subsequently optioned 45 claims from Ohman and his backers, the Koval family of Pickle Lake, in Sept. 1953. Sept.-Dec. 1953: Hasaga carried out line-cutting, trenching and diamond-drilling (7391 feet of ddh) on the optioned claims. Additional claims were staked. May 1954: Work resumed on the property and continued until Dec. 1954, at which time operations were suspended. During this time, Hasaga's exploration crew located at least five new showings on the property and completed 13,580 feet of diamond-drilling. Little work was conducted on the property between 1955 and 1975. During this time, Little Long Lac Gold Mines Ltd. acquired the Hasaga property. 1974: Little Long Lac Gold Mines Ltd. decided to re-examine the Hasaga property. A new grid was cut over the claim group and geological, ground mag, VLF-EM and IP surveys were carried out. 1987: Lac Minerals Ltd. conducted a major diamond-drilling program on the property. 1994: Barrick Gold Corporation acquired Lac Minerals Inc. and places the property into a wholly-owned subsidiary - Lac Properties. 2010: Tri Origin Exploration Ltd. included the patented claim group in an airborne AEM survey. 2015: Tri Origin optioned the property from Barrick Gold Corporation and carried out mapping and sampling. 2017: Tri Origin Exploration carried out geological mapping and sampling.

Assessment Work on File

Geology

Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Belt: Meen-Dempster

Geological Age: Neoarchean  

Geology Comments

Dec 07, 2005 (B Nelson) - The 'A' deposit outcrops between 2+00E/1+00N and 1+00W/1+00S on the Lac Minerals grid (measured in feet). A series of old trenches also exposes the mineralization. Thinly laminated metatuffs are located to the north of the mineralization. Mafic minerals compose 10 to 25% of the laminae in the metatuff. The mineralized unit is a well-sheared, siliceous, sericitic schist. The contact between the dacitic metatuffs and sericitic schist is gradational over a couple of metres. The schistosity strikes 082 degrees and dips 86 degrees S. The sericitic schist contains 1-5% very fine, disseminated pyrite and up to 1% disseminated tourmaline crystals and clusters. The tourmaline crystals define a mineral lineation on an azimuth of 100 degrees plunging 51 degrees. The sericitic schist is approximately 6 m in width and has a strike length of approximately 100 m. The sericitic unit appears to be lenticular in shape. A 1 to 2 m wide layer of mafic metatuff is situated immediately south of the mineralized sericitic schist. A lapilli metatuff is found south of the mafic metatuff. The matrix of the lapilli metatuff is intermediate in composition. The lapilli are intermediate to felsic in composition and are very stretched (length to thickness ratio greater than 10:1) The lapilli metatuff strikes 070 degrees and dips 80 degrees south. Narrow blue-grey quartz veins (0.5 to 3 cm) cut the lapilli metatuff and have a strike and dip of 075/70 degrees south. The Sioux Lookout Staff Geologist examined the surface expression of this deposit in 1989.

Lithology

Lithology Comments

Dec 07, 2005 (B Nelson) - The metatuffs are estimated to be dacitic in composition. The bedding and the foliation are sub-parallel, striking 070 degrees and dipping 76 degrees south. A prominent lineation on an azimuth of 114 degrees plunges 72 degrees. Fine grained felsic dykes, striking 080 degrees to 090 degrees, cut the metatuffs. These felsic dykes contain conjugate, quartz-tourmaline-filled tension gashes that trend 110 degrees and 170 degrees.

Mineralization

Mineralization Comments

Nov 07, 2016 (Andrew Tims) - Selected gold assay results from historic drilling include near-surface drill core intervals of 5.49 grams of gold per tonne (“g/t”) across 5.2 metres at 10.7 metres downhole, 11.66 g/t across 5.6 metres from 65.8 metres downhole, 4.11 g/t across 8.8 metres from 99.4 metres downhole and 5.14 g/t across 10.8 metres at 112.9 metres downhole.

May 29, 2020 (Therese Pettigrew) - Sampling done by Barrick Gold in 1994 returned values of 3.25 g/t Au over 7.7 feet and 16.25 g/t Au over 2.0 feet. Approximately 3 parallel, gold-bearing, sericitic felsic horizons were exposed in the stripping. The width of the total sericitic felsic package is up to 23 feet where exposed. The horizons were separated by 1.2 foot intermediate dykes or tuffs. The gold mineralization within the intermediate dykes is spotty with values up to 205 ppb (Assessment report 52O07SE0002).

Mineral Record Details

References

Map - Cat Lake-Pickle Lake, geological compilation series, Kenora and Thunder Bay districts

Publication Number: M2218 Scale: 1:253,440    Date: 1976

Author: Sage R.P., Breaks F.W., Troup W.R.

Publisher Name: Ontario Division of Mines

Location:

MonoMap - Geology of the Cat Lake-Pickle Lake area, districts of Kenora and Thunder Bay

Publication Number: R207 Date: 1982

Author: Sage R.P., Breaks F.W.

Publisher Name: Ontario Geological Survey

Location:

Article - Sioux Lookout Resident Geologist's District - 1989

Publication Number: MP147.004 Page: 80  Date: 1997

Author: Janes D.A., Seim G.Wm., Storey C.C.

Publisher Name: Ontario Geological Survey

Location:

Map - Precambrian geology, Muskegsagagen-Bancroft lakes area, District of Kenora (Patricia Portion)

Publication Number: M2507 Scale: 1:50,000    Date: 1986

Author: Stott G.M., Wilson A.C.

Publisher Name: Ontario Geological Survey

Location:

Mono - Mineral Deposits of the Central Portion of Uchi Subprovince, Volume 1, Meen Lake to Kesagiminnis Lake Portion

Publication Number: OFR5869 Page: 314-318  Date: 1993

Author: Seim G.Wm.

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