Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52J13NE00007

Record: MDI52J13NE00007

General

Commodities

Primary Commodities: Lithium

Secondary Commodities: Rare Earth Elements

Location

Township or Area: Root Lake Area

Latitude: 50° 54' 23.14"    Longitude: -91° 38' 42.69"

UTM Zone: 15    Easting: 595255.53   Northing: 5640293.7    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52J13NE

Point Location Description: DDH 5 location from assessment file map, hole collar not visible

Location Method: Based on Assessment

Access Description: Area is accessed by logging roads that extend along the north side of Root Lake from the Rawhide Road.

Exploration History

1956-57: Ground MAG survey followed by 5 diamond drill holes for 3240 feet by Capital Lithium Mines. 2011: Pierre Gagne Contracting conducted an airborne aeromag survey. 2012: Golden Dory Resources Corp. carried out prospecting and soil sampling.

Assessment Work on File

Geology

Province: Superior

Subprovince: English River

Geological Age: Neoarchean  

Geology Comments

Aug 28, 2007 (Mark Puumala) - Blackburn et al. (1999) report that the Capital Lithium Mines occurrences are based on reported diamond drill intersections of white, muscovite-bearing pegmatites containing abundant tourmaline during a 1957 exploration program. The "34 claim group" occurrence is based on reports of beryl crystals (up to 3 mm) in two diamond drill holes, while the "5 claim group" occurrence is based on reports of spodumene in a single drill hole. Reconnaissance sampling of surface exposures of a number of pegmatites in the area of the Capital Lithium Mines occurrences that was reported by Hinz et al. (1999) did not report any significant assay results.

Jun 08, 2021 (Therese Pettigrew) - The Root Lake property straddles the Uchi and English River Subprovinces of the Superior Province of Northwest Ontario. The main mineralized zone lies within unsubdivided metavolcanic and clastic sedimentary rocks of the Birch-Uchi Greenstone Belt and to a lesser extent mafic metavolcanic rocks of the English River Subprovince.

Lithology

Mineralization

Mineralization Comments

Jun 08, 2021 (Therese Pettigrew) - The five holes drilled in 1957 by Capital Lithium Mines intersected numerous, white, muscovite--bearing pegmatites with abundant tourmaline. Two of the holes, numbers 2 and 5, intersected pegmatites reported to contain green beryl crystals up to 3 mm in size. Abundant, disseminated sulphides (estimated up to 7%) were encountered, predominantly consisting of pyrite and pyrrhotite, but chalcopyrite and bornite were reported, particularly in holes 1 and 3 (bornite was reported from hole 1 only) (Hinz et al., 2000). Spodumene (lithium silicate) crystals (locally up to 50 cms in length) are exposed in a 9.14 metre wide medium to very coarse grained pegmatite dike, in association with feldspar, quartz, mica and tourmaline. Tourmaline is most common at or near the dike contacts. It is believed the associated rare metals including Ta and Nb are closely linked to the presence of tourmaline. Li ranged from detection limit of 2 ppm to 145 ppm in sample 791166 located in the south east corner of claim 4250499. The sample is described as a feldspar-rich rock with traces of pyrite. Rare earth element results were converted to oxides and results were also given as total rare earth oxides (TREO) and listed in Appendix 6. TREO values ranged from 10 to 250 ppm in the central part of claim 4251419. The sample is described as a biotite-rich pegmatite with an unidentified purple mineral located in outcrop (Assessment report 20000008632).

Mineral Record Details

References

Map - Root Lake sheet, Kenora District

Publication Number: M2156 Scale: 1:31,680    Date: 1969

Author: Clifford P.M.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Report of Activities 1999, Resident Geologist Program, Red Lake Regional Resident Geologist Report: Red Lake-Kenora Districts

Publication Number: OFR6003 Page: 25-26  Date: 2000

Author: Hinz P., Storey C.C., Gosselin S.D.M., Blackburn C.E., Kosloski L.

Publisher Name: Ontario Geological Survey

Location:

Mono - Report of Activities 1998, Resident Geologist Program, Red Lake Regional Resident Geologist Report: Red Lake and Kenora Districts

Publication Number: OFR5987 Page: 25-37  Date: 1999

Author: Blackburn C.E., Hinz P., Storey C.C., Kosloski L., Ravnaas C.

Publisher Name: Ontario Geological Survey

Location:

Mono - An evaluation of the industrial mineral potential of parts of the districts of Kenora and Rainy River

Publication Number: OFR5718 Date: 1990

Author: Storey C.C.

Publisher Name: Ontario Geological Survey

Location:

Mono - Fertile Peraluminous Granites and Related Rare-Element Mineralization in Pegmatites, Superior Province, Northwest and Northeast Ontario: Operation Treasure Hunt

Publication Number: OFR6099 Page: 32-33  Date: 2003

Author: Breaks F.W., Selway J.B., Tindle A.G.

Publisher Name: Ontario Geological Survey

Location:

Publication - Geology of Canadian Lithium Deposits; Geological Survey of Canada, Economic Geology Report 21

Publication Number: Econ Geol 21 Page: 64-65  Date: 1965

Author: Mulligan, R.

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/102454

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