Ontario Geological Survey
Permanent Link to this Record:
MDI52E11NE00060
| Record Name(s) | High Lake (Porphyry) - 1952 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Prospect |
| Date Created | 1977-Jun-09 |
| Date Last Modified | 2022-Nov-04 |
| Created By | |
| Revised By |
Primary Commodities: Copper
Secondary Commodities: Gold, Molybdenum
Township or Area: Ewart
Latitude: 49° 42' 32" Longitude: -95° 6' 22.88"
UTM Zone: 15 Easting: 348139.62 Northing: 5508394.24 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52E11NE
Point Location Description: Precise
Location Method: Conversion from MDI
1946: trenching and sampling for gold. 1952: C. Alcock carried out stripping and trenching. 1956: Green Bay Mining and Exploration drilled 656.8 m of DD in 6 holes. 1958: Francoeur Mines Ltd. drilled 319 m of DD in 4 holes. 1963: Alcock and Tew drilled 83 m of DD in 2 holes. 1965-66: Steerola Exploration Ltd. conducted geophysical surveys and drilled 111 m of DD in one hole.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 27 | 52E11NE9061 | 52E11NE9061 |
| 15 | 52E11NE9060 | 52E11NE9060 |
| 12 | 52E11NE9066 | 52E11NE9066 |
| 63.1996 | 52E11NE9069 | 52E11NE9069 |
Province: Superior
Subprovince: Wabigoon
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Quartz-Feldspar Porphyry | 1 | Quartz-Feldspar | Host |
|---|---|---|---|---|
| Felsic lava flow-unsubdivided | 2 |
Nov 23, 2017 (Therese Pettigrew) - The rock in which the copper mineralization occurs is characterized by bluish-grey quartz eyes, 1-3 mm in diameter, set in a fine groundmass of buff-coloured quartzo-feldspathic material with large (10-15 mm) phenocrysts of white or pink feldspar erratically and sparsely distributed throughout (Davies, 1965).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Molybdenite | Economic | Ore | ||||
| 4 | Tourmaline | Economic | Ore |
Nov 23, 2017 (Therese Pettigrew) - Disseminated chalcopyrite, pyrite, and minor molybdenite mineralization in porphyritic granite, locally becoming massive in shear zones. A 75-foot wide channel sample assayed 0.95% Cu and a 150-pound bulk sample from the trench assayed 1.89% Cu. Highest gold value obtained was 0.04 opt Au over a width of 35 feet which also ran 0.52% Cu. Work done in 1963 extended the known area of copper mineralization to a length of at least 610 m and a width of about 76 m. Quartz veins, generally very narrow, cut the porphyry in a number of directions, but are especially abundant in a N-S direction, and possibly represent filled tension fractures. Minor tourmaline, pyrite, chalcopyrite, and molybdenite are found associated with the quartz veins. Though chalcopyrite, and to the lesser extent pyrite, is disseminated through much of the rock, it is clear that these sulphides are most abundant in zones of weakness. Minute slip planes and adjacent minute fractures are well mineralized; more massive intervening rock is but weakly mineralized. Several distinct shear zones contain massive chalcopyrite and magnetite; the abundance of either of these two minerals in many specimens seems to be directly proportional to the abundance of the other. Minor finely disseminated molybdenite has been found in a number of places (Davies, 1965). The best assay from the 1956 drill program by Green Bay Mining was from DDH #2, which assayed 1.37% Cu across 0.76 m and 1.10% Cu across 1 m in a second zone (AFRI 52E11NE9061).
| Rank | Characteristic |
|---|---|
| 1 | Sheared |
Mono - Copper, nickel, lead and zinc deposits of Ontario
Publication Number: MDC012 Page: 149-150 Date: 1969
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of High Lake-Rush Bay area, District of Kenora
Publication Number: R041 Page: 46-48 Date: 1997
Author: Davies J.C.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Copper, nickel, lead and zinc deposits in Ontario (revised to February, 1957)
Publication Number: MDC002 Page: 14 Date: 1957
Author: Thomson J.E., Ferguson S.A., Johnston W.G.Q., Pye E.G., Savage W.S., Thomson R.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Gold deposits of Ontario, part 1, districts of Algoma, Cochrane, Kenora, Rainy River, and Thunder Bay
Publication Number: MDC013 Page: 237 Date: 1971
Author: Ferguson S.A., Groen H.A., Haynes R.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
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