Ontario Geological Survey
Permanent Link to this Record:
MDI52A04NE00006
Record Name(s) | Hidden Treasure - 1886 |
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Related Record Type | Partial |
Related Record(s) | |
Record Status | Discretionary Occurrence |
Date Created | 1991-Mar-05 |
Date Last Modified | 2022-Mar-04 |
Created By | |
Revised By |
Primary Commodities: Silver, Calcite
Secondary Commodities: Barite, Fluorite
Township or Area: Pearson
Latitude: 48° 12' 23.21" Longitude: -89° 40' 22.95"
UTM Zone: 16 Easting: 301407.81 Northing: 5342701.38 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52A04NE
Point Location Description: AMIS location
Location Method: Conversion from MDI
1886-1888: development occurred.
Province: Southern
Formation Group: Animikie Group
Geological Age: Paleoproterozoic
Rock Type | Rank | Composition | Texture | Relationship | Mudstone | 1 | Shale |
---|---|---|---|---|
Diabase | 2 | Diabse Sill | ||
Vein | 3 | Host |
Mar 01, 2018 (Therese Pettigrew) - The vein was worked by 3 adits driven into the side of a hill, one above the other and at intervals of 12.2 m. The workings are on the side of a hill of horizontal Animikie sediments with a thickness of 30.5 m, capped by a diabase sill 15 m or more thick. The sediments are chiefly thinly laminated, dark grey shales interbedded with massive beds of greywacke up to 0.6 m thick (Tanton, 1931).
Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
---|---|---|---|---|---|---|---|
1 | Calcite | Economic | Ore | ||||
2 | Fluorite | Economic | Ore | ||||
3 | Pyrite | Economic | Ore |
Mar 01, 2018 (Therese Pettigrew) - The vein occurs in a .fault, the rocks on the northern side of which have moved almost horizontally, but slightly downward, in an easterly direction with respect to the rocks on the south as indicated by slickensides in a small notch in the diabase above the adits. The vein system, as exposed, consists of two veins each averaging 58.4 cm wide; they are separated by 0.3-0.6 m of country rock, strike south 55 degrees east, and dip vertically. The vein material consists of intimately associated barite and calcite in about equal proportions. Well-formed, transparent, and pale brown barite crystals up to 1.3 cm in length are numerous. Pink and white varieties of calcite occur. No metallic minerals were observed (Tanton, 1931).
Rank | Classification |
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1 | Vein |
Rank | Characteristic |
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1 | Vein |
Publication - Fort William and Port Arthur, and Thunder Cape Map-area, Thunder Bay District, Ontario; Geological Survey of Canada, Memoir 167
Publication Number: GSC Memoir 167 Scale: Date: 1931
Author: Tanton, T.L.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/100799
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