Ministry of Energy, Northern Development and Mines
Permanent Link to this Record: MDI53G05SW00003| Deposit Name(s) | Sandhill Crane - 1969 |
|---|---|
| Related Deposit Type | None |
| Deposit Status | discretionary occurrence |
| Date Created | 1983-Nov-25 |
| Date Last Modified | 2019-Aug-19 |
| Created By | Q Unknown |
| Revised By | T Pettigrew |
Primary Commodities: copper, chromium
Secondary Commodities: gold, nickel
Township or Area: Kippen Lake Area
Latitude: 53° 18' 28.26" Longitude: -91° 57' 29.46"
UTM Zone: 15 Easting: 569417 Northing: 5907023 UTM Datum: NAD83
Resident Geologist District: Red Lake
NTS Grid: 53G05SW
Point Location Description: General
Location Method: data compilation
Source Map: OGS 1969, MAP 2163 SANDHILL CRANE SHEET, IN GR 74
Sources Map Scale: 1:50 000
Access Description: Access:150 airmile NW of Pickle Lake or 180 mile NNE of Red Lake. Reserve of Muskrat Dam is approx 15 miles down river from the property. Access by float plane.
1969: Showing was discovered by OGS staff during a mapping project. 1970: Serem Ltd. carried out line cutting, EM and magnetic surveys. 1972: Serem Ltd. drilled 4 DDH totalling 474.1 m. 1973. Serem Ltd. drilled 2 DDH totalling 222.5 m. 1980: Gulf Minerals Canada Ltd. drilled 10 DDH totalling 2052.9 m.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 17 | 53G05SW0022 | Open |
| 23 | 53G05SW0020 | Open |
| 53G04NW0015 | 53G04NW8222 | Open |
Province: Superior
Subprovince: Sachigo
Belt: Muskrat Dam Lake
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship |
|---|---|---|---|---|
| metasedimentary | 1 | metaconglomerate | host |
08/19/2019 (T Pettigrew) - The arc volcanic Muskrat Dam assemblage consists of rhyolitic units in two stratigraphic positions dated 2734 Ma, komatiitic flows along the Severn River within gabbroic units, and an upper metasedimentary unit characterised by reworked andesite tuff to tuff breccia, well-developed bedding, grading, sorting, that is overlain by graded silts, arenites and conglomerates. The Sandhill Crane Island occurrence is hosted within a unique conglomerate with carbonate matrix and clast population as follows: matric 41 to 60%, gabbro 0 to 26%, mafic metavolcanics rock 10 to 36%, felsic metavolcanics rock 0 to 3%, metasediment 0 to 6%, chert 5 to 16%, iron formation 0 to 5%, quartz arenite 0 to 2%, and vein quartz 0 to 2%. Some clasts are surrounded by delicately layered carbonate, tentatively identified as stromatolites by Thurston et al. (1987). The presence of quartz arenite clasts, which are probably 2.9 billion years of age, in the 2734 million-year-old Muskrat Dam Assemblage means it was probably derived from erosion of the 2.9 billion-year-old Sachigo Subprovince material prior to emplacement of the rhyolitic part of the assemblage (2734 Ma) (Thurston et al., 1991).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Habit Description |
|---|---|---|---|---|---|---|---|
| 1 | pyrite | economic | ore | ||||
| 2 | pyrrhotite | economic | ore | ||||
| 3 | chalcopyrite | economic | ore | ||||
| 4 | sphalerite | economic | ore | ||||
| 5 | chromite | economic | ore |
08/19/2019 (T Pettigrew) - The matrix and rarely the pebbles of metaconglomerate exposed at the north west corner of Sandhill Crane Island have been replaced by disseminated to massive pyrrhotite and by concordant lenses of massive pyrite as much as 2 inches wide; rare chalcopyrite is associated with both the pyrite and pyrrhotite. The amount of sulphide minerals is highly variable, but the mineralized zone is exposed along strike for at least 300 feet. The surface of the outcrop is only locally rusty, and the rust appears to be related to ferruginous chert pebbles rather than to the sulphide mineralization. Three grab samples collected by the author from the metaconglomerate contained trace to 0.1 percent copper and trace amounts of gold and nickel (Ayres, 1969). No assays were reported from the 1972-73 drill programs by Serem. One of the holes that Gulf drilled in 1980 returned assays of up to 13580 ppm Cr2O3 (1.36% Cr2O3), and multiple values of >1000 ppm Cr2O3 in several other holes drilled on Gulf’s property within the Muskrat Dam greenstone belt (Red Lake RGP office mineral deposit files, file number RL3350).
Book - NMI FILE, 53G/05 CU 2
Publication Number: N/A Date: 1996
Publication - Geology of the Muskrat Dam Lake Area, p. 62
Publication Number: R074 Date: 1969
Author: Ayres, L.D.
Publisher Name: OGS
Publication - Northwestern Superior Province: Review and Terrane Analysis; In: Geology of Ontario, Part 1, p. 94
Publication Number: SV04-01 Date: 1991
Author: Thurston, P.C., Osmani, I.A., and Stone, D.
Publisher Name: OGS
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