Ontario Geological Survey
Permanent Link to this Record:
MDI000000001231
| Record Name(s) | Amethyst Creek - 2012, Blue Star Amethyst - 1991, Blue Star Resources - 1991 |
|---|---|
| Related Record Type | |
| Record Status | Past Producing Mine Without Reserves or Resources |
| Date Created | 2011-Apr-27 |
| Date Last Modified | 2021-Nov-24 |
| Created By | J Scott |
| Revised By | Therese Pettigrew |
Primary Commodities: Amethyst
Township or Area: Tartan Lake Area
Latitude: 48° 37' 8.69" Longitude: -88° 58' 5.9"
UTM Zone: 16 Easting: 354942 Northing: 5386982 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52A10SW
Point Location Description: Field visit with GPS; confirmed with Google Earth
Location Method: Field Visit with GPS
Access Description: Take HWY 527 north for 9 km to the Magone Lake road, a logging road leading east into the North of MacGregor area. East along this road for 10 km. At the top of a hill, there is a road leading south, marked R10. Turn right onto this road and the quarry is 200 m south, on the left.
1991: Blue Star Resources under Howard Pillsmaker bought the property from R. Harty and operated a permitted quarry on mining lease 1166702. 2006: Lease was cancelled due to default in tax payments. 2012: Allan Hietapakka staked the previous lease outline. 2014: A. Hietapakka performed prospecting. 2015: A. Hietapakka completed prospecting and manual stripping. 2016: Prospecting, GPS tracking of traverses and marking of amethyst occurrences, cutting brush and small trees for access trail to work sites.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.56096 | 20000014199 | 20000014199 |
| 2.57149 | 20000014493 | 20000014493 |
Province: Superior
Subprovince: Quetico
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Granite | 1 | Granite | Host |
|---|---|---|---|---|
| Vein | 2 | Is | ||
| Terrigenous-Clastic-Unsubdivided | 3 | Near |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Amethyst | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Pyrite | Economic | Ore | ||||
| 4 | Galena | Economic | Ore |
Mar 10, 2020 (Therese Pettigrew) - The amethyst occurs along the sides of east-trending gullies. The sides of the gullies are cliffs exposing breccia composed of pink granitic fragments cemented with white to light purple to green quartz. Vugs in this breccia vary from a few centimetres to a metre or more. The large vugs are lined with very dark, and very large points of amethyst (Thunder Bay RGP office mineral deposit files). Outcrops exposed by stripping near the quarry area reveal the dark pink monzonite in contact with dark grey, schistose metasedimentary rock. A breccia zone, 1-1.5 m wide, is situated between the host monzonite and a massive amethyst vein. Fragments in the breccia consist of angular, pink monzonite, and darker, slightly banded, gneissic rock. The fragment size is fairly uniform, about 15-25 cm. The amethyst vein appears to be about 0.5 m wide and is massive, dark purple amethyst. The vein is zoned, with a layer of white quartz, 1 cm wide, lining the wall rock, then a layer of green quartz, 4 cm wide, and then the dark purple amethyst. The zoning is mirrored on both sides of the vein. The best amethyst points occur in vugs within the breccia. Vugs can attain almost 0.5 m in size and can have points of 2 cm diameter or larger. Colour of the amethyst in the vugs varies from pale violet to almost black. Sulphides, notably chalcopyrite, galena, and pyrite, occur scattered through the breccia (Garland, 1994).
Mono - Amethyst in the Thunder Bay Area
Publication Number: OFR5891 Scale: Date: 1994
Author: Garland M.I.
Publisher Name: Ontario Geological Survey
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