Ontario Geological Survey
Permanent Link to this Record:
MDI52J04SE00024
| Record Name(s) | Black Lake - No. 1 Vein - 1950, Bonanza Vein - 1990, Princess - 1998, Richards No. 1 Vein - 1950 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1995-May-25 |
| Date Last Modified | 2022-Mar-02 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Secondary Commodities: Silver
Township or Area: Sharron Lake Area
Latitude: 50° 7' 55.12" Longitude: -91° 36' 26.46"
UTM Zone: 15 Easting: 599532.02 Northing: 5554233.2 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52J04SE
Point Location Description: Transfer
Location Method: Conversion from MDI
1950: Floregold Red Lake Mines Ltd. conducted trenching and sampling. 1963: Bankfield Consolidated Mines Ltd. drilled 9 DDH totalling 309.1 m. 1990: Cream Silver Mines Ltd. carried out mapping, soil geochemistry and rock sampling. 1995: Placer Dome Canada Ltd. carried out mapping and sampling. 1997: Cameco Corporation carried out stripping and sampling. 1998: Cameco carried out trenching and mapping.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 52J04NE0010A1 | 52J04NE0031 | 52J04NE0031 |
| 2.19515 | 52J04NE2002 | 52J04NE2002 |
| 2.18310 | 52J04NE2001 | 52J04NE2001 |
| 2.13722 | 52J04NE0001 | 52J04NE0001 |
| 2.16043 | 52J04NE0006 | 52J04NE0006 |
| 52J04NE0016A1 | 52J04NE0024 | 52J04NE0024 |
Province: Superior
Subprovince: Wabigoon
Belt: Abram-Minnitaki Lakes
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Felsic lava flow-unsubdivided | 1 | Contains |
|---|---|---|---|---|
| Silty Sandstone | 2 | Siltstone And Sandstone | Near | |
| Vein | 3 | Quartz-Carbonate | Host |
Aug 24, 2018 (Therese Pettigrew) - The trenches are characterized by intercalated felsic volcaniclastics and clastic sediments intruded by late mafic, intermediate and felsic dikes. The clastic sediments consist of repeating beds of thin to thickly bedded siltstone and sandstone that display graded bedding, cross bedding, and flame features. The clastic sediment layers display strong pervasive carbonate alteration that is developed along specific horizons. Bedding is oriented between 285 0 and 246 0 dipping 87 0N. Tops directions based on the flame structures and crossbedding indicate a facing direction towards the north. The felsic volcaniclastics can be subdivided into fine and coarse grained phases. The coarse felsic volcaniclastics are very similar to those observed at the Black #4 and the Holbrook Trench (Chubb et al., 1997). The coarse felsic volcaniclastics contain the bulk of the quartz-carbonate vein stockwork. The quartz-carbonate vein stockwork consists of thin orthogonal quartz veins (flat lying and vertical) that are continuous along strike but are restricted to specific volcaniclastic beds. The quartz veins are massive and white with trace pyrite and are relatively undeformed. The coarse volcaniclastics contain trace disseminated and fracture related pyrite mineralization. The finer felsic volcaniclastics (reworked lapilli tuff) consist of more tuffaceous looking material and display bedding and coarse graded bedding. The felsic volcaniclastics display strong selective sericite, weak selective carbonate and weak selective chlorite alteration (AFRI 52J04NE2002).
| 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 | Galena | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Carbonate | Economic | Gangue | ||||
| 3 | Chlorite | Economic | Gangue | ||||
| 4 | Sericite | Economic | Gangue |
Aug 24, 2018 (R Tuomi) - 1950 CHIP, GRAB SAMPLES (AF-0015-B1): 4.2 OPT AU/0.5', UP TO 20 OPT AU AND OVER 1 OPT AG, 1990 CHIP, GRAB SAMPLES (AF-0026): 0.12 OPT AU/1.2', UP TO 4.44 OPT AU AND 1 OPT AG. Black Lake No. 2 Vein located at NAD 83 UTM Zone 15 599389 m E, 5554416 m N had a grab sample collected in 1950 that assayed 0.02 opt Au. Black Lake No. 3 Vein located at NAD 83 UTM Zone 15 600026 m E, 5554366 m N had a grab sample collected in 1950 that assayed 0.26 opt Au. Chip sample AF-0026 collected in 1990 assayed 0.3 opt Au over 0.9’. Black Lake No. 4 Vein located at NAD 83 UTM Zone 15 599443 m E, 5554788 m N had a grab sample collected in 1963 that assayed 0.10 opt Au. Black Lake No. 5 Vein located at NAD 83 UTM Zone 15 599803 m E, 5554578 m N had a chip sample AF-0015-B1 collected in 1950 that assayed 0.03 opt Au over 4’.
Aug 24, 2018 (Therese Pettigrew) - A composite grab sample BL-90-10 assayed 4.44 opt Au and 1.0 opt Ag, although other grab samples collected in the same program assayed only trace to 0.66 opt Au and no silver (AFRI 52J04NE0001). Samples collected by Placer Dome in 1995 assayed up to 35.2 gpt Au (52J04NE0006).
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