Ministry of Energy, Northern Development and Mines
Permanent Link to this Record: MDI000000002485| Deposit Name(s) | Koski Showing - 1990, Cox - 1940 |
|---|---|
| Deposit Status | occurrence |
| Abandoned Mine Inventory Reference | 03031 |
| Date Created | 2020-Dec-18 |
| Date Last Modified | 2020-Dec-18 |
| Created By | T Pettigrew |
| Revised By | T Pettigrew |
Primary Commodities: gold
Secondary Commodities: copper
Township or Area: Rickaby
Latitude: 49° 45' 33.33" Longitude: -87° 36' 48.76"
UTM Zone: 16 Easting: 455810 Northing: 5512045 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 42E13SE
Point Location Description: Map in Assessment report 20000006225
Location Method: based on assessment
Access Description: The Expansion Lake claims can be reached by travelling along Highway 11 and turning onto the Kinghorn road. Follow the Kinghorn road to the 23 km road marker, and turn west 100 m past the marker along an abandoned logging road. Then drive approximately 10 km west to the northwest end of the property. Old forestry roads provide good access to almost all of the property areas. Most of the roads are 4x4 truck accessible, in particular the roads leading to the main Expansion Lake showings.
1990: J.A. Koski carried out trenching and sampling. 2008: Alto Ventures Ltd. carried out prospecting, trenching, and sampling. 2009: Alto Ventures carried out stripping, geological mapping, prospecting, and channel sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.47671 | 20000006225 | Open |
| 2.44116 | 20000004542 | Open |
| 63.5866 | 42E13SE0073 | Open |
Province: Superior
Subprovince: Wabigoon
Belt: Onaman
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship |
|---|---|---|---|---|
| mafic metavolcanics | 1 | contains | ||
| vein | 2 | quartz | host |
12/18/2020 (T Pettigrew) - The geology in the Expansion Lake property is mainly comprised of metavolcanics; felsic to intermediate and mafic to intermediate volcanic rocks, with small granodioritic-dioritic intrusive stocks. In the main Expansion Lake area, there is a previously unmapped dioritic intrusive stock, along the northwestern shore of Expansion Lake. It is a relatively small intrusive body, intruding into the surrounding felsic to intermediate fragmental and bedded volcanic rocks (Assessment report 20000006225).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Habit Description |
|---|---|---|---|---|---|---|---|
| 1 | pyrite | economic | ore | ||||
| 2 | chalcopyrite | economic | ore | ||||
| 1 | quartz | economic | gangue | ||||
| 2 | carbonate | economic | gangue |
12/18/2020 (T Pettigrew) - Trenching by John Koski on the east trending peninsula at the north end of Expansion Lake returned a 0.22 oz/t Au grab sample, hosted in quartz veining within mafic volcanic flows (Assessment File 42E13SE0073). Two samples were taken by Alto Ventures in 2009 with one result reporting 95 ppb and 1052 ppm Cu (Sample 775491). The veins are very good in appearance, with trace to 5% pyrite and chalcopyrite (Assessment report 20000006225).
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For detailed information regarding this mineral deposit please contact the Thunder Bay North Resident Geologist District Office