Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52A04NE00002

Record: MDI52A04NE00002

General

Mineral Record Identification
Record Name(s) Cloud Lake - 1876, NW 1/4 Lot 5 Con. 2 - 1876
Related Record Type Simple
Related Record(s)
Record Status Occurrence
Date Created 1979-Jul-30
Date Last Modified 2022-Mar-04
Created By
Revised By

Commodities

Primary Commodities: Silver

Secondary Commodities: Zinc, Lead



Location

Township or Area: Crooks

Latitude: 48° 8' 17.15"    Longitude: -89° 31' 39.74"

UTM Zone: 16    Easting: 311954.86   Northing: 5334739.33    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 52A04NE

Point Location Description: AMIS location

Location Method: Conversion from MDI



Exploration History

1876: stripping. 1907: shaft was sunk. No assessments files were on record.


Geology

Province: Southern

Formation Group: Animikie Group

Geological Age: Paleoproterozoic  



Lithology

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

Mineralization

Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Alteration Style
1ArgentiteEconomicOre
1QuartzEconomicGangue
2CalciteEconomicGangue

Mineralization Comments

Feb 28, 2018 (Therese Pettigrew) - A vein was discovered in 1895, near Cloud Lake, in the northwest quarter of lot 5, Crooks Township, and traced southeast through a distance of about 457.2 m, into the northeast quarter of the same lot. The vein was stripped and tested on the side of a cliff 6 m high, close to the lake. In 1907 a shaft was sunk to a depth of 13.7 m near the western boundary of the northeast quarter of lot 5. The vein cements a fracture zone about 1.2-1.5 m wide striking northwest and passing vertically through a diabase sill 1.5 m thick and flat-lying Animikie shales below. The vein consists of quartz and calcite mineralized with argentite. It was estimated that the material removed from the shaft had a silver content averaging 20 ounces to the ton. The outcrop on the cliff near the lake carried more spectacular values (Tanton, 1931).



Mineral Record Details

Classification
RankClassification            
1 Vein
Characteristics
Rank Characteristic            
1 Vein

References

Mono - Silver cobalt calcite vein deposits of Ontario

Publication Number: MDC010 Scale:     Date: 1968

Author: Sergiades A.O.

Publisher Name: Ontario Dept. of Mines

Location:


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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Ministry Contact Information

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