Ontario Geological Survey
Permanent Link to this Record:
MDI52I08NE00012
| Record Name(s) | Falcon Lake Discovery Deposit - 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' 21.31" Longitude: -88° 7' 37.54"
UTM Zone: 16 Easting: 420020 Northing: 5591784 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 52I08NE
Point Location Description: Li occurrence east of Falcon Lake
Location Method: Based on Assessment
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 3 DDH. 1979: Cominco Limited carried out geochemistry, sampling. 2009: Canadian Orebodies carried out line cutting and 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 | Pegmatite | 1 | Is |
|---|---|---|---|---|
| Amphibolite | 1 | Schistose | Contains |
Mar 07, 2014 (A Wilson) - The pegmatite dykes occur in four northeasterly trending zones from about l mile to 3 miles west of Falcon Lake, and lie within a central band of greenstone schists. Most dip steeply southeast, but a few dip gently. Remnants of country rock occur within the pegmatites, commonly on strike with the wall-rock, and up to 50% of one dyke is a cherty dull green material, apparently consisting of altered rock fragments. There are two varieties of pegmatite, a white albite pegmatite and a red pegmatite rich in orthoclase, or, in places, perthite. The Discovery dike is exposed in a ridge of schistose amphibolite about 700 feet south of the east end of a small pond one and three-quarter miles west-northwest of Falcon Lake. It strikes N40°E for an exposed length of 65 feet, and is up to 18 feet wide.
| 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 | ||||
| 7 | Apatite | Economic | Gangue |
Mar 07, 2014 (A Wilson) - Surface exposures contain spodumene crystals up to 8 inches in length. Some of the material assayed better than 3% Li20. The dike is made up of 15 to 20% pale-greenish-grey spodumene, as unoriented prismatic crystals up to 8 inches in length associated with fine-grained quartz, feldspar, muscovite, and accessory apatite. Chilled margins and the presence of rotated inclusions point to a magmatic origin. Three diamond drillholes were bored to test the deposit. One hole, No. D2, intersected 6 feet 3 inches of barren pegmatite at a depth in the hole of 176 feet 7 inches. About 100 feet east of the south end of the Discovery dike there is an irregular-shaped mass of spodumene-bearing pegmatite up to about 30 feet in diameter. The spodumene is found mainly along the east side of the body as crystals 4 inches or less in length in a matrix of fine-grained quartz, feldspar, and muscovite.
| Rank | Classification |
|---|---|
| 1 | Pegmatite |
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 - 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:
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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