Ministry of Energy, Northern Development and Mines
Permanent Link to this Record: MDI000000002300| Deposit Name(s) | Amax - 1982, Lindholm-croteau - 1968, Lacana - 1984 |
|---|---|
| Deposit Status | occurrence |
| Abandoned Mine Inventory Reference | 03042 |
| Date Created | 2019-Jul-25 |
| Date Last Modified | 2019-Jul-25 |
| Created By | T Pettigrew |
| Revised By | T Pettigrew |
Primary Commodities: gold
Secondary Commodities: copper
Township or Area: Maun Lake Area
Latitude: 50° 27' 33.89" Longitude: -86° 58' 5.58"
UTM Zone: 16 Easting: 502256 Northing: 5589713 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 42L07NW
Point Location Description: AMIS trench location
Location Method: data compilation
1950: Lake Osu Mines Ltd. drilled 5 DDH totaling 565.9 m. 1968: R. Lindholm carried out trenching. 1969: J. Croteau carried out trenching. 1981: Amax Minerals Exploration carried out trenching and geological mapping. 1982: Amax drilled 4 DDH totaling 168 m. 1984: Lacana carried out geological mapping and sampling. 2004: Shaggy Dog Exploration Inc. did compilation work. 2017: R. Hodgson carried out prospecting and sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 14 | 42L07NW0008 | Open |
| 63.4520 | 42L07NW0006 | Open |
| 11 | 42L07NW0010 | Open |
| 2.27707 | 42L07NW2004 | Open |
| 2.58421 | 20000015578 | Open |
Province: Superior
Subprovince: Wabigoon
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship |
|---|---|---|---|---|
| intermediate metavolcanics | 1 | andesite | host | |
| vein | 2 | quartz-carbonate | host |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Habit Description |
|---|---|---|---|---|---|---|---|
| 1 | arsenopyrite | economic | ore | ||||
| 2 | pyrite | economic | ore | ||||
| 3 | pyrrhotite | economic | ore | ||||
| 4 | chalcopyrite | economic | ore | ||||
| 5 | sphalerite | economic | ore |
07/25/2019 (T Pettigrew) - A narrow, north trending (N10E) shear zone cross cuts a series of intermediate to mafic volcanic flows striking N45E. Narrow quartz veins and zones of quartz carbonate cemented breccia occur within the shear and locally contain heavy arsenopyrite, pyrite and pyrrhotite mineralization. A series of trenches expose the shear for over 800 feet (243.8 m); these were all sampled. The results indicate that the better gold values occur in the south where Amax drilled and decrease in a northerly direction. For example, in the most southerly trench, assays range from 0.002 to 0.307 oz./ton Au (0.06-9.54 g/t Au), central trench 0.08 oz./ton Au (2.49 g/t Au), northern trench 0.016 oz./ton Au (0.5 g/t Au) (Assessment file 42L07NW0006). DDH 1087-5, drilled by Amax in 1982, returned 0.52 ppm Au over 1.45 m from quartz and quartz-carbonate stringers and veinlets in an andesitic pillow breccia zone. The veinlets contained up to 5% arsenopyrite, pyrite, pyrrhotite, and chalcopyrite. DDH 1087-2 returned 0.81 ppm Au over 0.53 m from quartz and quartz-carbonate stringers with up to 10-15% arsenopyrite and pyrite with traces of chalcopyrite and sphalerite. The sulphides occur in blebs and thin stringers (Assessment file 42L07NW0008). Samples collected by R. Hodgson in 2017 returned values of up to 2.334 ppm Au, over 10,000 ppm As, 1275 ppm Cu, and 1269 ppm Mn (Assessment file 20000015578).
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