Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52F16NW00048

Record: MDI52F16NW00048

General

Mineral Record Identification
Record Name(s)	Tot Lake - 1978, Kozowy-Leduchowski - 1964, Webb Township Occurrence - 1982
Related Record Type	Simple
Related Record(s)
Record Status	Occurrence
Date Created	1982-Oct-13
Date Last Modified	2023-May-18
Created By
Revised By

Commodities

Primary Commodities: Rubidium, Cesium, Lithium

Secondary Commodities: Tantalum, Tin

Location

Township or Area: Webb

Latitude: 49° 55' 45.09" Longitude: -92° 27' 28.17"

UTM Zone: 15 Easting: 538913 Northing: 5530899 UTM Datum: NAD83

Resident Geologist District: Kenora

NTS Grid: 52F16NW

Point Location Description: Trench location on OGS map P2371

Location Method: Data Compilation

Access Description: Access is gained by travelling 27.4 km along the Ghost Lake Road from its termination at Highway 601 to an easterly junction with a gravelled former logging access road, the latter allowing vehicle access within about 2.6 km of the showing. The showing can be reached by an old trail that extends east from the North Ghost Lake access road

Exploration History

1964: staked by A. Koxowy and A. Leduchowski. Optioned to Carol Metal Mines Ltd., who conducted trenching, bulk sampling, and drilled 4 DDH totalling 223 m. 1978-79: Tantalum Mining Corp. drilled 3 DDH totalling 156 m. 1982: Tarbush Lode Mining Ltd. conducted trenching. 1998: Champion Bear Resources Ltd. conducted a ground magnetometer survey.

Assessment Work on File

Assessment Work on File
Office File Number	Online Assessment File Identifier	Online Assessment File Directory
52F16NW0023B1	52F16NW0130	52F16NW0130
52F16NW0020B1	52F16NW0122	52F16NW0122
52F16NW0031E1	52F16NW0119	52F16NW0119
2.19034	52F16NW2003	52F16NW2003

Geology

Province: Superior

Subprovince: Wabigoon

Geological Age: Archean

Lithology

Lithology Data
Rock Type	Rank	Composition	Texture	Relationship
Pegmatite	1			Host
Amphibolite	2			Adjacent

Lithology Comments

Jul 26, 2017 (Therese Pettigrew) - The host rock intruded by the pegmatite is a dark grey to almost black-coloured amphibolite. It has a weak foliation of 070 degrees and is schistose adjacent to the contact with the pegmatite. The schistosity is parallel to the contact. The contact is sharp and inclusions of host rock appear in the pegmatite (Storey, 1990).

Mineralization

Mineralization and Alteration
Rank	Mineral Name	Class	Economic Mineral Type
1	Albite	Economic	Ore
2	Lepidolite	Economic	Ore
3	Pollucite	Economic	Ore
4	Spodumene	Economic	Ore
5	Tantalite	Economic	Ore
6	Tourmaline	Economic	Ore
1	Quartz	Economic	Gangue
2	Feldspar	Economic	Gangue
3	Plagioclase	Economic	Gangue
4	Muscovite	Economic	Gangue
5	Apatite	Economic	Gangue
6	Garnet	Economic	Gangue

Mineralization Comments

Jul 26, 2017 (R Tuomi) - 1984: 2.9% Cs, 0.71% Rb, 40 ppm Ta across 1.0 m on surface, depth - grade - 1979: several short DDH intersec., best section at 134.2 ft, 0.044% Ta2O5/4.8 ft (GW-3), depth - grade - 1968: surface chip samples, approx. 1% Li over 3 ft.

Jul 26, 2017 (Therese Pettigrew) - Tantalum Mining Corp’s 1978 DDH GW-1 averaged 0.036% Ta2O5 over 4.1 m. The pegmatite is a zoned body exposed for 48 m along strike, with a maximum width of 6 m. The dyke cuts across the foliation in deformed country rock amphibolites, striking about 135 degrees with an 80 degree easterly dip. Foliations in the amphibolites are unaffected by the intrusive except within about 2 to 3 m of the dyke. The dyke is apparently quite uniform in thickness, reaching a maximum of about 4 m. The complex pegmatite is composed of two major phases: a very coarse-grained to pegmatitic assemblage of quartz, potash feldspar, plagioclase, greenish-yellow muscovite, and spodumene, and a fine-grained (aplitic), white phase composed of albite and quartz. Accessory minerals include coarse prisms of black tourmaline (associated with the pegmatitic phase), moderate orange pink, euhedral crystals of almandite-spessartite garnet, found locally in the contact zone between the two major phases, and disseminated tiny crystals of blue apatite and an unidentified opaque mineral, possibly tantalite (both found in the aplitic phase) (Page, 1984). A chip sample for 1 m across the pollucite zone contained 2.9% Ce, 0.71% Rb and 40 ppm Ta (Storey, 1990).

Mineral Record Details

Classification
Rank	Classification
1	Pegmatite

Characteristics
Rank	Characteristic
1	Intrusive

References

Part - Geology of the Gullwing Lake-Sunstrum area

Publication Number: ARV59-04 Page: 24-25 Date: 1997

Author: Harding W.D.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Pegmatite mineral resources of Ontario

Publication Number: IMR021 Date: 1997

Author: Hewitt D.F.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Industrial minerals of northern Ontario-supplement 1

Publication Number: OFR5388 Date: 1982

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