Ministry of Energy, Northern Development and Mines
Permanent Link to this Record: MDI000000002484| Deposit Name(s) | Expansion Lake Trench 3 - 2008 |
|---|---|
| Deposit Status | occurrence |
| Date Created | 2020-Dec-18 |
| Date Last Modified | 2020-Dec-18 |
| Created By | T Pettigrew |
| Revised By | T Pettigrew |
Primary Commodities: silver
Secondary Commodities: gold
Township or Area: Rickaby
Latitude: 49° 45' 35.42" Longitude: -87° 37' 15.48"
UTM Zone: 16 Easting: 455276 Northing: 5512114 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.
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 |
Province: Superior
Subprovince: Wabigoon
Belt: Onaman
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship |
|---|---|---|---|---|
| intermediate intrusive | 1 | granodiorite to diorite | ||
| 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 | ||||
| 3 | galena | economic | ore | ||||
| 1 | quartz | economic | gangue | ||||
| 2 | fluorite | economic | gangue | ||||
| sericite | alteration | sericitization | 1 | weak | disseminated | ||
| hematite | alteration | hematization | 2 | weak | disseminated |
12/18/2020 (T Pettigrew) - Trench 3 is located 200 m west from Trench 2. The trench is diorite-granodiorite, with an approximately 1 m white quartz vein running almost E-W through the trench. This quartz vein is massive, with trace amounts of pyrite-chalcopyrite and galena, occurring in clusters along the southern margin of the vein. Fluorite is also present within the vein. Very little alteration is present, with very minor sericite associated with stronger sections of shearing, and faint hematite associate with the large quartz vein. Methodical channel sampling of this trench failed to yield any anomalous gold values, but preliminary grab samples during the 2008 trenching and washing process turned up two anomalous samples; 745071 with 736 ppb Au and 54 ppm Ag, and 745072 with 195 ppb Au and 184.95 ppm Ag. These two samples are described as quartz vein material with clusters of galena, suggesting the source is the large vein cross-cutting Trench 3 (Assessment report 20000006225).
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For detailed information regarding this mineral deposit please contact the Thunder Bay North Resident Geologist District Office