Ontario Geological Survey
Permanent Link to this Record:
MDI52A04NE00003
| Record Name(s) | Ponka - 1969, Korpela Copper Occurrence - 1965 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1979-Aug-03 |
| Date Last Modified | 2023-Aug-03 |
| Created By | |
| Revised By |
Primary Commodities: Copper
Township or Area: Pearson
Latitude: 48° 10' 36.6" Longitude: -89° 41' 26.61"
UTM Zone: 16 Easting: 299979 Northing: 5339456 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52A04NE
Point Location Description: Location description in SMDR file
Location Method: Conversion from MDI
Pre-1965: Pitting and trenching by unknown operators.
Province: Southern
Formation Group: Animikie Group
Geological Age: Paleoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Anorthosite | 1 | Anorthosite | Host |
|---|---|---|---|---|
| Gabbro | 2 | Gabbro | ||
| Mudstone | 3 | Shale |
Mar 01, 2018 (Therese Pettigrew) - The area consists of rocks of the Animikie Rove Formation which have been intruded by numerous dykes, sills, etc. of Keweenawan age.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore |
Mar 01, 2018 (Therese Pettigrew) - Chalcopyrite and pyrite disseminated in anorthosite and concentrated in irregular segregations near the base of a diabase sill (Shklanka, 1969). Mineralization occurs in coarse-grained to very coarse-grained Late Precambrian anorthosite, which shows no effects of alteration and in places displays well-developed subophitic texture. The anorthosite, which may be a differentiated sill, is interrupted in places by small irregular blebs of gabbro. Mineralization consists of chalcopyrite and subordinate iron sulphides disseminated in the anorthosite and apparently concentrated in irregular segregations. Sulphides are molded on feldspars and appear to be primary. There are three showings. Showing No. 1 is about 457 m north of the SE corner of lot 18 and consists of chalcopyrite disseminated in anorthosite. Showing No. 2 is about 152 m west and 305 m north of the SE corner of Lot 18 and also exposes chalcopyrite disseminated in anorthosite. Showing No. 3, in lot 19 about 0.8 km west of showing No. 1, contained chalcopyrite in a small segregation in anorthosite. A grab sample from showing No. 1 is reported to have contained 1.7% Cu but to have a low nickel content. A grab sample from showing No. 3 contained 1.59% Cu. It is estimated that none of the showings would average better than 0.5% Cu (RGP Mineral Deposit files, Thunder Bay office).
Mono - Copper, nickel, lead and zinc deposits of Ontario
Publication Number: MDC012 Page: 345 Date: 1969
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
Article - Resident Geologist's Office, Port Arthur
Publication Number: PR1965-03.027 Page: 64 Date: 1997
Author: Pye E.G.
Publisher Name: Ontario Dept. of Mines
Location:
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