Ontario Geological Survey
Permanent Link to this Record:
MDI52A10NW00005
| Record Name(s) | F. Johnson - 1976, Anderson Creek - 1976 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1982-Oct-26 |
| Date Last Modified | 2022-Feb-23 |
| Created By | |
| Revised By |
Primary Commodities: Amethyst
Township or Area: McTavish
Latitude: 48° 39' 45.54" Longitude: -88° 45' 59.4"
UTM Zone: 16 Easting: 369926 Northing: 5391461 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52A10NE, 52A10NW
Point Location Description: Along Anderson Creek, about 1 mile north of Loon Lake.
Location Method: Data Compilation
Access Description: Travel on Hwy 17 to East Loon Lake Road. Take central road and follow for 1.2 km. Take bush road (4x4 only) north for 2.1 km. Occurrence is just past a wider section of Anderson creek. Veins exposed on N-S-trending cliff face 150 feet east of road.
1976: F. Johnson held quarry permit no. 5264, allowing him to extract 100 cubic yards of material annually. No assessment files have been found on file.
Province: Superior
Subprovince: Quetico
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Granite | 1 | Host |
|---|---|---|---|---|
| Vein | 1 | Quartz | Is |
Mar 10, 2020 (Therese Pettigrew) - Host rock is granite-monzonite, medium grained and red in colour, with 20-30% quartz, 70-75% pink feldspar, and 0-5% amphibole. There are 2-3 quartz breccia veins that are 2-3” in width, which can be traced 500’ (152 m) east from Anderson Creek The veins are 25% quartz, 70-75% granite, and 0-5% vugs. The amethyst is pale lavender to smoky in colour, generally less than 0.25” (Thunder Bay RGP office mineral deposit files).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Amethyst | Economic | Ore |
Jun 20, 2018 (Therese Pettigrew) - Amethyst mineralization is associated with faulting that occurred in the Late Precambrian; it is found in granitic rocks that occur near the contact with the overlying Sibley sedimentary rocks. The amethyst occurs in quartz veins that are 2-3 inches wide. These veins are vertical and enclose vugs approximately 1 foot wide (Vos et al., 1982).
| Rank | Classification |
|---|---|
| 1 | Hydrothermal |
| 1 | Vein |
| Rank | Characteristic |
|---|---|
| 1 | Vein |
Map - Geological series, McTavish Township (west part of north half), District of Thunder Bay
Publication Number: P0720 Scale: 1:15,840 Date: 1997
Author: McIlwaine W.H.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Mono - Amethyst deposits of Ontario
Publication Number: GB05 Scale: Date: 1998
Author: Vos M.A.
Publisher Name: Ontario Division of Mines
Location:
Mono - Industrial minerals of northern Ontario-supplement 1
Publication Number: OFR5388 Scale: Date: 1982
Author: Vos M.A., Abolins T., Smith V.
Publisher Name: Ontario Geological Survey
Location:
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