Ontario Geological Survey
Permanent Link to this Record:
MDI000000000484
| Record Name(s) | Great plains DDH 72-09 - 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: Kecheokagan Lake Area
Latitude: 52° 11' 52.99" Longitude: -90° 56' 8.86"
UTM Zone: 15 Easting: 641074.999 Northing: 5785075.005 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 53B02NW
Point Location Description: Assessmant 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 | Mafic Gneiss | 1 | Hornblende-Plagioclase Gneiss | Contains |
|---|
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Pyrrhotite | Economic | Ore |
Mar 07, 2008 (Mark Puumala) - McWilliams, Gillan and Smith (1981) report that this occurrence is found in an area immediately north of Kecheokagan Lake that is dominated by muskeg and overburden with less than 5% outcrop. McWilliams, Gillan and Smith (1981) indicate that the geology of the area consists largely of massive to gneissic, hornblende and chlorite-rich mafic metavolcanic rocks (one outcrop of agglomerate is also reported), with porphyritic granodiorite occurring to the south. Hornblende-plagioclase gneiss occurs at the metavolcanic-intrusive contact. 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 72-09. A summary of drill hole 72-09 provided by McWilliams, Gillan and Smith (1981) indicates that nickel assays ranging from 0.01 to 0.11% were obtained from a 13.7 m wide section of very fine-grained, altered hornblende-plagioclase gneiss containing calcite-and quartz-filled fractures. These fractures are reported to be mineralized with stringers of pyrite (10-20%) and pyrrhotite (2-5%). No details regarding the locations and widths of the reported assays are provided by McWilliams, Gillan and Smith (1981).
| Rank | Classification |
|---|---|
| 1 | Unknown |
| Rank | Characteristic |
|---|---|
| 1 | Vein |
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For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office