Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52I08NE00009

Record: MDI52I08NE00009

General

Commodities

Primary Commodities: Lithium, Tantalum, Beryllium, Rubidium

Secondary Commodities: Cesium, Niobium

Location

Township or Area: Falcon Lake Area

Latitude: 50° 28' 27.01"    Longitude: -88° 9' .07"

UTM Zone: 16    Easting: 418396   Northing: 5591985    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52I08NE

Point Location Description: Li occurrence west of Falcon Lake

Location Method: Data Compilation

Access Description: The Falcon Lake pegmatite area is located approximately 85 km ENE of Armstrong. It can be accessed by tertiary road.

Exploration History

1955: Mimz Syndicated conducted prospecting and discovered the showing. 1956: British Canadian Lithium Mines Limited conducted mapping and drilled 9 DDH. 1979: Cominco Limited carried out geochemistry, sampling. 2009: Canadian Orebodies conducted mapping, sampling, trenching and soil sampling. 2010: Canadian Orebodies drilled 3 DDH totalling 263.1 m. 2016: Argonaut Resources drilled 6 DDH totalling 534 m. 2023: Battery Age Minerals optioned the property from FE Battery Metals Corp. and drilled 30 DDH totalling 2642 m.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Belt: Caribou Lake

Geological Age: Archean  

Lithology

Lithology Comments

Mar 07, 2014 (A Wilson) - The exposed pegmatite body strikes N10OE and can be followed in outcrops for about 100 feet. Diamond drilling showed the pegmatite to be a lens-shaped mass, 300 to 400 feet long and up to about 70 feet thick, with a dip of 70O-80OE. The exposed pegmatite body cuts thinly layered schistose amphibolite striking N75OE and dipping steeply south. The second pegmatite body found in the West "area" lies east of, and parallel to, the first body.

Mineralization

Mineralization Comments

Mar 07, 2014 (A Wilson) - One drillhole cut the lens at a depth of 190 feet. The hole intersected 60 feet of pegmatite, of which 35 feet was found to average better than l.0% Li20. A second drillhole cut the lens at a depth of 250 feet. It intersected 75 feet of pegmatite. In this case, though, only 10 feet was found to average better l.0% Li20. One drillhole returned an intersection of 1.29% Li20 over 13.7 ft. and 1.09% Li20 over 36 ft. at a vertical depth of 70 ft. The pegmatite contains spodumene as unoriented prismatic crystals, mostly 3 to 6 inches and ranging up to about 12 inches in length, associated with potash feldspar, quartz, albite, and muscovite, together with accessory amounts of apatite and black tourmaline. In outcrop, the spodumene is characteristically pale-grey or pale-green and has a high lithia content. But, in the cores from the diamond-drillholes much of the spodumene was found to be dark-green or black and highly altered. As elsewhere in the area, this alteration is due mainly to a pseudomorphic replacement of the spodumene by muscovite or sericite. The second pegmatite body found in the west area lies east of, and parallel to, the first body. Two diamond-drillholes were collared in it; in a third hole, in which both contacts were intersected, a true width of over 35 feet was indicated. This pegmatite body was found to average over l.0% Li2O and to be the most important of the several occurrences found near Falcon Lake. It is similar in character to the exposed pegmatite and may be of greater lateral extent.

Apr 10, 2019 (Therese Pettigrew) - Results from the 2010 drill program included assays up to 1.52% Li2O, 68.6 ppm Ta2O5, 214.7 ppm Be, 377.9 ppm Cs, 79.9 ppm Nb, and 3477.1 ppm Rb (Assessment report 20000009257). Results from the 2016 drill program included assays up to 1.95% Li2O and 306 ppm Ta2O5 (Assessment report 20000013878). DDH 23FL-001 returned 1.37% Li2O over 27.6 m from 16.65 m depth (Battery Age Minerals ASX release July 26, 2023).

Mineral Record Details

References

Mono - Pegmatite mineral resources of Ontario

Publication Number: IMR021 Page: 48, 51  Date: 1997

Author: Hewitt D.F.

Publisher Name: Ontario Dept. of Mines

Location:

MonoMap - Geology of the Crescent Lake area, District of Thunder Bay

Publication Number: R055 Page: 53-56  Date: 1968

Author: Pye E.G.

Publisher Name: Ontario Dept. of Mines

Location:

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

Publication Number: Econ Geol 21 Page: 61-62  Date: 1965

Author: Mulligan, R.

Publisher Name: Geological Survey o

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

Mono - Industrial minerals of northern Ontario-supplement 1

Publication Number: OFR5388 Page: 192-193  Date: 1982

Author: Vos M.A., Abolins T., Smith V.

Publisher Name: Ontario Geological Survey

Location:

Map - Crescent Lake area, Thunder Bay District

Publication Number: M2100 Date: 1997

Author: Pye E.G.

Publisher Name: Ontario Dept. of Mines

Location:

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