Ontario Geological Survey
Permanent Link to this Record:
MDI41N14NE00007
| Record Name(s) | Denison Lake Occurrence - 1988 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Jan-08 |
| Date Last Modified | 2022-Sep-16 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Groseilliers
Latitude: 47° 59' 33.6" Longitude: -85° 14' 43.5"
UTM Zone: 16 Easting: 630900.44 Northing: 5316974.89 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 41N14NE
Point Location Description: Grab samples below waterfall at Denison Lake
Location Method: Based on Assessment
Access Description: The site is accessible by helicopter from Wawa.
1988-89: Muscocho Explorations Ltd. - airborne geophysics, mapping, sampling, stream sediment sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| WP Groseilliers-4 | 42C03SE0305 | 42C03SE0305 |
| WP Groseilliers-3 | 42C03SE0006 | 42C03SE0006 |
| Rock Type | Rank | Composition | Texture | Relationship | Vein | 1 | Quartz | Stockwork | Host |
|---|---|---|---|---|
| Quartz-Feldspar Porphyry | 2 | Quartz-Feldspar | Porphyry | Host |
Dec 07, 2005 (A Wilson) - Elevated gold values are recorded from a quartz vein stockwork within a semi-conformable quartz-feldspar porphyry intrusion. The porpphry extends to the southeast as a low-lying sill to dike-like body. The porphyry occurs at the contact between mafic metavolcanic rocks and metasedments. The veins occur closer to the metavolcanic side of the contact and the porphyry appears to widen at this point.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Gangue | ||||
| 2 | Galena | Economic | Gangue | ||||
| 3 | Arsenopyrite | Economic | Gangue | ||||
| 4 | Chalcopyrite | Economic | Gangue |
Dec 07, 2005 (A Wilson) - Mineralization consists of aggregates of euhedral pyrite and galena +/- arsenopyrite and chalcopyrite in cavities, vugs and fractures. Clotted aggregates of chlorite+/-sericite, muscovite, biotite, tourmaline were also observed. The best assays obtained from the area were 0.03 oz/t Au.
Map - Precambrian geology, Mishibishu Lake area, Dog Harbour sheet
Publication Number: P3157 Scale: 1:15,840 Date: 1992
Author: Reid R.G., Bowen R.P., Heather K.B., Logothetis J., Reilly B.A.
Publisher Name: Ontario Geological Survey
Location:
Map - University River, Algoma and Thunder Bay districts
Publication Number: M2333 Scale: 1:63,360 Date: 1976
Author: Bennett G., Thurston P.C., Giguere J.F.
Publisher Name: Ontario Division of Mines
Location:
Mono - Wawa mineral deposits data base
Publication Number: OFR5775 Page: 208 Date: 1991
Author: Frey E.D., Stewart R.C.
Publisher Name: Ontario Geological Survey
Location:
Map - Operation Pukaskwa, University River sheet, districts of Thunder Bay and Algoma
Publication Number: P0507 Scale: 1:63,360 Date: 1997
Author: Bennett G., Thurston P.C., Giguere J.F.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Operation Pukaskwa, districts of Algoma and Thunder Bay
Publication Number: P0541 Scale: 1:126,720 Date: 1997
Author: Bennett G., Thurston P.C., Giguere J.F.
Publisher Name: Ontario Dept. of Mines
Location:
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For detailed information regarding this mineral record please contact the Sault Ste. Marie Resident Geologist District Office