Ontario Geological Survey
Permanent Link to this Record:
MDI000000000483
| Record Name(s) | Great Plains DDH 72-C-16 - 1972 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2008-Mar-07 |
| Date Last Modified | 2022-Jun-08 |
| Created By | |
| Revised By |
Primary Commodities: Nickel
Township or Area: Bugbee Lake Area
Latitude: 52° 12' 55.97" Longitude: -90° 28' 56.09"
UTM Zone: 15 Easting: 672000 Northing: 5788000.001 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 53B01NW
Point Location Description: Assessment file map.
Location Method: Data Compilation
1971-72: Geophysical surveys and diamond drilling by Great Plains Development Company of Canada. 1981: Geological mapping, geochemnical mapping and geophysics by Norcen Energy Resources.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 53B02NW0017 | 53B01NW0003 | 53B01NW0003 |
Province: Superior
Subprovince: Berens River
Terrane: North Caribou
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Gneiss-Unsubdivided | 1 | Chlorite-Biotite Gneiss | Contains |
|---|---|---|---|---|
| Ultramafic-Unsubdivided | 2 | Chlorite-Serpentine-Biotite Gneiss With Asbestos |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Pyrrhotite | Economic | Ore | ||||
| Asbestos | Alteration | Serpentinization | 1 |
Mar 07, 2008 (Mark Puumala) - McWilliams, Gillan and Smith (1981) report that this occurrence is found in an area dominated by muskeg and overburden with few, widely scattered, outcrops. Airborne geophysical surveys carried out by the Great Plains Development Company of Canada over the Horseshoe Lake greenstone belt in 1971 resulted in the identification of a number of geophysical anomalies that were subsequently tested during a 25 hole diamond drilling program. This occurrence is based on assay results reported by McWilliams, Gillan and Smith (1981) to have been obtained from Great Plains Development Company's diamond drill hole number 72-C-16. McWilliams, Gillan and Smith (1981) report that the diamond drilling program carried out by Great Plains Development Company in this area intersected an assemblage of sedimentary and volcanic schists and gneisses, with granite and quartz/carbonate veins being encountered in some holes. The geophysical anomalies (magnetic and electromagnetic) were interpreted to have been caused by pyrite and pyrrhotite mineralization, which was found in all drill holes (McWilliams, Gillan and Smith 1981). A drill hole summary log for 72-C-16 provided by McWilliams, Gillan and Smith (1981) indicates that a significant nickel assay was obtained from a sample collected from a unit of chlorite-biotite gneiss that was encountered from 136.7 to 139.6 m below ground surface. The mineralized zone contained 20 to 30% disseminated pyrrhotite (locally up to 60%), and nickel assays ranging from 0.03 to 0.09% were reported to have been obtained. However, McWilliams, Gillan and Smith (1981) provide no information regarding the depths or lengths of the sampled intervals. The mineralized section was reported to be underlain by a unit of chlorite-serpentine-biotite gneiss containing localized asbestos. The drill hole was terminated in this unit at a depth of 155.45 m.
| Rank | Classification |
|---|---|
| 1 | Unknown |
| Rank | Characteristic |
|---|---|
| 1 | Disseminated |
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