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Ontario Geological Survey
Permanent Link to this Record:
MDI52I08NE00013
| Record Name(s) | Falcon Lake East - 1955, Motsen Claim Group - 1955 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Jan-12 |
| Date Last Modified | 2022-Mar-04 |
| Created By | |
| Revised By |
Primary Commodities: Lithium
Township or Area: Falcon Lake Area
Latitude: 50° 28' 9.77" Longitude: -88° 7' 15.81"
UTM Zone: 16 Easting: 420443 Northing: 5591421.01 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 52I08NE
Point Location Description: Map in Assessment report 20000005990
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.
1955: Mimz Syndicated conducted prospecting and discovered the showing. 1956: British Canadian Lithium Mines Limited conducted mapping and drilled 6 DDH. 1979: Cominco Limited carried out geochemistry, sampling. 2009: Canadian Orebodies conducted mapping, sampling, trenching and soil sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 63A.313 | 52I08NE0012 | 52I08NE0012 |
| 12 | 52I08NE0009 | 52I08NE0009 |
| 2.3207 | 52I08NE0006 | 52I08NE0006 |
| 2.3957 | 52I08NE0007 | 52I08NE0007 |
| 2.46925 | 20000005990 | 20000005990 |
Province: Superior
Subprovince: Wabigoon
Belt: Caribou Lake
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Amphibolite | 1 | Sheared | Contains |
|---|---|---|---|---|
| Pegmatite | 2 | Is |
Mar 07, 2014 (A Wilson) - The East deposits are found in schistose amphibolite about 1/2 mile east-southeast of the Discovery dike and l 1/4 miles west-northwest of Falcon Lake. The principal pegmatite body strikes N20°E and dips steeply east. It is exposed across a width of 13 ft. in two outcrops about 500 ft. apart. The pegmatite bodies are 200 to 400 ft. long and narrow along strike. The pegmatite occurs as narrow stringers at depths of 150 ft.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Spodumene | Economic | Ore | ||||
| 2 | Feldspar | Economic | Gangue | ||||
| 3 | Quartz | Economic | Gangue | ||||
| 4 | Albite | Economic | Gangue | ||||
| 5 | Tourmaline | Economic | Gangue | ||||
| 6 | Beryl | Economic | Gangue | ||||
| 8 | Apatite | Economic | Gangue |
Mar 07, 2014 (A Wilson) - The dike is made up of fine-grained spodumene and fine- to medium-grained potash feldspar in a groundmass of quartz, albite, and muscovite, having accessory black tourmaline and apatite. The spodumene crystals are pale-green and show no preferred orientation. They make up 10 to 15% of the rock. The pegmatite body was tested by five diamond-drillholes, spaced at intervals of 200 feet, over a strike length of 800 feet. Two of the diamond drillholes, one at the south end of the body and the other about midway between the two outcrops, failed to intersect pegmatite and indicated the deposit to consist of two short lenses rather than a continuous dike. The drilling showed the pegmatite lenses to be of low-average grade. One hole, though, cut 18 feet of pegmatite, which was found on analysis to average 1.13% Li20. In diamond-drillhole No. E5, near the south end of the deposit, some of the spodumene of the pegmatite intersected was found to be dark-grey and highly altered. This alteration may reflect the southward convergence of the pegmatite and a prominent diabase dike. A second pegmatite body is exposed about 600 feet west of the East deposit. It forms a lens up to 30 feet wide that has been traced on the surface for 75 feet in a N50°E direction. The occurrence was tested by a single diamond drillhole, but again nothing of commercial importance was discovered.
| Rank | Classification |
|---|---|
| 1 | Pegmatite |
Mono - Industrial minerals of northern Ontario-supplement 1
Publication Number: OFR5388 Scale: Date: 1982
Author: Vos M.A., Abolins T., Smith V.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of the Crescent Lake area, District of Thunder Bay
Publication Number: R055 Scale: Date: 1968
Author: Pye E.G.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Pegmatite mineral resources of Ontario
Publication Number: IMR021 Scale: Date: 1997
Author: Hewitt D.F.
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 Scale: Date: 1965
Author: Mulligan, R.
Publisher Name: Geological Survey o
Location: https://doi.org/10.4095/102454
Map - Crescent Lake area, Thunder Bay District
Publication Number: M2100 Scale: 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