Ontario Geological Survey
Permanent Link to this Record:
MDI000000000485
| Record Name(s) | Reg Lake Shear Zone - 1996 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2008-Mar-11 |
| Date Last Modified | 2022-Jun-08 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Kecheokagan Lake Area
Latitude: 52° 13' 26.19" Longitude: -90° 54' 44.15"
UTM Zone: 15 Easting: 642600.001 Northing: 5788000.001 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 53B02NW
Point Location Description: Assessment file map.
Location Method: Data Compilation
1981: Geological and geophysical surveys by Norcen Energy Resources Limited. 1996: Geological mapping and prospecting by Placer Dome Canada Limited.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 53B02NW0017 | 53B01NW0003 | 53B01NW0003 |
| 2.16452 | 53B02NE0005 | 53B02NE0005 |
Province: Superior
Subprovince: Berens River
Terrane: North Caribou
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Terrigenous-Clastic-Unsubdivided | 1 | Contains |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Contains | ||
| Felsic lava flow-unsubdivided | 3 | Near | ||
| Porphyry-unsubdivided | 4 | Felsic Dikes | Near |
| 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 11, 2008 (Mark Puumala) - Talbot (1996) described the Reg Lake shear zone as an east-southeast-striking shear that cross-cuts an east-trending sequence of intercalated clastic metasedimentary rocks, mafic to felsic metavolcanics, and pyroclastics. The dominant metasedimentary rocks are described as saccharoidal, biotite-rich, and strongly-foliated quartzite, while the felsic metavolcanics are described as bleached, saccharoidal, biotite-rich and strongly-foliated. Talbot (1996) describes the sheared mafic metavolcanics as being gabbroic and containing 2-5% disseminated pyrrhotite and pyrite. Numerous felsic dikes/sills are also reported to intrude the metasedimentary-metavolcanic sequence parallel to the lithological contacts. McWilliams, Gillan and Smith (1981) reported an assay of 740 ppb Au from a grab sample of sheared quartzite, while Talbot (1996) obtained a grab sample result of 760 ppb Au from a sample of sheared mafic metavolcanics.
| Rank | Classification |
|---|---|
| 1 | Lode (Gold) |
| Rank | Characteristic |
|---|---|
| 1 | Sheared |
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