Ontario Geological Survey
Permanent Link to this Record:
MDI000000003494
| Record Name(s) | Silverback Au - 2021 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2023-Jul-19 |
| Date Last Modified | 2023-Jul-19 |
| Created By | |
| Revised By |
Primary Commodities: Gold, Copper
Secondary Commodities: Nickel
Township or Area: Bedivere Lake Area
Latitude: 48° 50' 15.42" Longitude: -90° 45' 4.73"
UTM Zone: 15 Easting: 665003 Northing: 5411843 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52B15SW
Point Location Description: OFR6383 p. 59
Location Method: Data Compilation
Access Description: Access to the claim group is via Highway 11, northwest from Thunder Bay to Brule Road. Travel north on Brule Road for approximately 17 km to Connection Road, then continue northeast on Connection Road for approximately 5 km to reach the centre of the property.
2021: B. Holbik carried out prospecting and sampling. 2022: B. Holbik carried out stripping, prospecting, and sampling.
Province: Superior
Subprovince: Wabigoon
Geological Age: Archean
Jul 19, 2023 (Therese Pettigrew) - The Silverback property straddles the Lac de Mille Lac greenstone belt and the Marmion terrain (Stone 2004) within the central Wabigoon Subprovince. Stone (2004) mapped a series of late mafic-ultramafic intrusions in both the Lac de Mille Lac greenstone belt and the Marmion batholith and described them as follows: 1. An oval stock (approximately 800 m diameter) of coarse-grained varitextured gabbro and hornblendite intruding the gneisses of the Marmion batholith located north of central Lac des Mille Lacs. 2. Discordant dikes of peridotitic to pyroxenitic composition cut volcanic sequences of the Lac des Mille Lacs greenstone belt. The dikes strike northerly and northeasterly and attain a width of up to 100 m where exposed on islands in Lac des Mille Lacs north of Bolton Bay. 3. Large angular boulders of hornblendite and peridotite occur on the shores of a small crescentic pond 4 km east of Baril Lake.
| Rock Type | Rank | Composition | Texture | Relationship | Gabbro | 1 |
|---|---|---|---|---|
| Vein | 2 | quartz | Host |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 3 | Malachite | Economic | Ore | ||||
| 4 | Bornite | Economic | Ore |
Jul 19, 2023 (Therese Pettigrew) - In 2021, B. Holbik collected a grab sample from the Silverback Au occurrence and submitted it to ALS Canada Ltd. for analysis. The sample, which was collected from narrow quartz veins with malachite staining, returned 0.69 ppm Au and 1840 ppm Cu. At the Silverback Ni showing 150 m to the west (NAD83 Zone 15, 664856mE 5411796mN), sample 21DCSB038 returned 1469 ppm Ni, 114.7 ppm Co, 21.23 ppb Pt, 15.94 ppb Pd from an ultramafic with disseminated sulphides (Campbell et al., 2022). In 2022, B. Holbik stripped an area adjacent to the original discovery and encountered gold and copper mineralization within sheared, altered mafic intrusive host rocks containing stringers and disseminations of chalcopyrite, pyrite, and bornite. Grab sampling returned results of up to 5.64% Cu and 9.78 g/t Au (Campbell et al., 2023).
| Commodity | Analytical Method | Digestion Method | Result | Unit | Limit | Qualifier |
|---|---|---|---|---|---|---|
| Chromium | XRF | 2471 | ppm | |||
| Cobalt | ICP-MS | 114.7 | ppm | |||
| Cobalt | ICP-MS | 85.1 | ppm | |||
| Copper | ICP-MS | 16 | ppm | |||
| Copper | ICP-MS | 120 | ppm | |||
| Copper | Unknown | 1840 | ppm | |||
| Copper | Unknown | 5.64 | % | |||
| Gold | Unknown | .69 | ppm | |||
| Gold | ICP-MS | .003 | ppm | |||
| Gold | Unknown | 9.78 | g/t | |||
| Gold | ICP-MS | BDL | ||||
| Molybdenum | ICP-MS | .46 | ppm | |||
| Molybdenum | ICP-MS | 34 | ppm | |||
| Nickel | ICP-MS | 1137 | ppm | |||
| Nickel | ICP-MS | 1469 | ppm | |||
| Palladium | ICP-MS | .02 | ppm | |||
| Palladium | ICP-MS | BDL | ||||
| Platinum | ICP-MS | .018 | ppm | |||
| Platinum | ICP-MS | BDL |
Mono - Report of Activities 2021, Resident Geologist Program, Thunder Bay South Regional Resident Geologist Report: Thunder Bay South District
Publication Number: OFR6383 Page: 55-63 Date: 2022
Author: Campbell D.A., Jonsson J.R.B., Kurcinka C.E., Dorland G., Pettigrew T.K., Daniels C.M., Bousquet P.
Publisher Name: Ontario Geological Survey
Location:
Mono - Report of Activities 2022, Resident Geologist Program, Thunder Bay South Regional Resident Geologist Report: Thunder Bay South District
Publication Number: OFR6401 Page: 33 Date: 2023
Author: Campbell D.A., Jonsson J.R.B., Dorland G., Pettigrew T.K., Ferguson S.A.
Publisher Name:
Location:
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