Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52A04NE00006

Record: MDI52A04NE00006

General

Mineral Record Identification
Record Name(s) Hidden Treasure - 1886
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

Commodities

Primary Commodities: Silver, Calcite

Secondary Commodities: Barite, Fluorite



Location

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



Exploration History

1886-1888: development occurred.


Geology

Province: Southern

Formation Group: Animikie Group

Geological Age: Paleoproterozoic  



Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
Mudstone 1 Shale
Diabase 2 Diabse Sill
Vein 3 Host

Lithology Comments

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).




Mineralization

Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Alteration Style
1CalciteEconomicOre
2FluoriteEconomicOre
3PyriteEconomicOre

Mineralization Comments

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).



Mineral Record Details

Classification
RankClassification            
1 Vein
Characteristics
Rank Characteristic            
1 Vein

References

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


Report an Error

We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.


Terms of Use

Please review our Terms of Use agreement for this data product.


Ministry Contact Information

For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office