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Ontario Geological Survey
Permanent Link to this Record:
MDI53B14NE00010
| Record Name(s) | Eyapamikama Lake Molybdenite-Fluorite - 1938 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1995-May-23 |
| Date Last Modified | 2023-Apr-18 |
| Created By | |
| Revised By |
Primary Commodities: Lithium, Rubidium
Secondary Commodities: Fluorite, Molybdenum, Tungsten
Township or Area: Keeyask Lake Area
Latitude: 52° 57' 10.22" Longitude: -91° 5' 47.35"
UTM Zone: 15 Easting: 627878.32 Northing: 5868720.13 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 53B14NE
Point Location Description: From map in Assessment report 53B14NE0018
Location Method: Data Compilation
1938: Showing discovered by OGS staff member J. Satterly during a mapping program. 1985: Moss Resources. carried out VLF-EM and magnetics surveys. 1987: Power Explorations Inc. conducted prospecting, mapping, stripping, and sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.10530 | 53B14NE0018 | 53B14NE0018 |
| 53B14NE0015 | 53B14NE0025 | 53B14NE0025 |
Province: Superior
Subprovince: Berens River
Terrane: North Caribou
Domain: North Caribou Core
Belt: North Caribou
Geological Age: Mesoarchean
| Rock Type | Rank | Composition | Texture | Relationship | Mudstone | 1 | Cordierite-Rich Metapelite |
|---|---|---|---|---|
| Quartz Monzonite | 2 | Trondhjemite To Quartz Monzonite Dykes |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Molybdenite | Economic | Ore | ||||
| 2 | Fluorite | Economic | Ore | ||||
| 3 | Pyrite | Economic | Ore | ||||
| 1 | Cordierite | Economic | Gangue | ||||
| 2 | Biotite | Economic | Gangue | ||||
| 3 | Fuchsite | Economic | Gangue | ||||
| 4 | Muscovite | Economic | Gangue | ||||
| 5 | Quartz | Economic | Gangue | ||||
| 6 | Tourmaline | Economic | Gangue |
Aug 16, 2019 (Therese Pettigrew) - Breaks and Bartlett (1991) described the showing as follows: “Narrow dikes of trondhjemite to quartz monzonite occur in cordierite-rich metapelitic rocks at the extreme eastern and northwestern ends of Eyapamikama Lake. On the shoreline at the northwestern end of Eyapamikama Lake, a 6 m-wide trondhjemite dikes striking 065 degrees is concordantly emplaced within an intercalated metasedimentary assemblage of metawacke and biotite-cordierite metapelite. The trondhjemite which weathers a light pink-grey is massive, medium-grained, equigranular, and hololeucocratic. Numerous fracture-controlled veins, which are oriented subperpendicular to the dike contacts, appear to be consanguineous with the trondhjemite since these veins never crosscut the intrusive contacts. These quartz veins may contain sporadic, disseminated, fine-grained molybdenite and purple fluorite. Fluorite also occurs interstitially between subhedral plagioclase grains in the trondhjemite. Along the dike contacts several zones of greisen assemblages are developed as indicated by enrichment in coarse-grained, green muscovite and higher amounts of fluorite, molybdenite, and pyrite.” Sample H24-11 returned assays of 3220 ppm F, 168 ppm Li, 12 ppm Nb, and 380 ppm Rb. Sample H24-4 returned an assay of 3600 ppm F and 95 ppm W (Breaks and Bartlett, 1991).
| Rank | Classification |
|---|---|
| 1 | Porphyry |
| Rank | Characteristic |
|---|---|
| 1 | Intrusive |
Article - Opapimiskan Lake project: Precambrian geology, Quaternary geology, and mineral deposits of the North Caribou Lake area, District of Kenora, Patricia Portion
Publication Number: MP119.049 Page: 272 Date: 1997
Author: Breaks F.W., Bartlett J.R., de Kemp E.A., Finamore P.F., Jones G.R., Macdonald A.J., Shields H.N., Wallace H.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, Precambrian geology, Eyapamikama Lake area, (Opapimiskan Lake project), Kenora District (Patricia Portion)
Publication Number: P2834 Scale: 1:31,680 Date: 1985
Author: Bartlett J.R., Breaks F.W., de Kemp E.A., Shields H.N.
Publisher Name: Ontario Geological Survey
Location:
Part - Geology of the Windigo-North Caribou lakes area
Publication Number: ARV48-09 Page: part 9, p. 1-32 Date: 1997
Author: Satterly J.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Geology of the Eyapamikama Lake area
Publication Number: OFR5792 Page: 67-68 Date: 1991
Author: Breaks F.W., Bartlett J.R.
Publisher Name: Ontario Geological Survey
Location:
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For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office