Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52A04NE00005

Record: MDI52A04NE00005

General

Mineral Record Identification
Record Name(s) Henrietta - 1885
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: Fluorite



Location

Township or Area: Pearson

Latitude: 48° 12' 31.62"    Longitude: -89° 40' 47.91"

UTM Zone: 16    Easting: 300902   Northing: 5342979    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 52A04NE

Point Location Description: AMIS shaft location

Location Method: Conversion from MDI



Exploration History

1885-87: a shaft 15.2 m deep was sunk.


Geology

Province: Southern

Formation Group: Animikie Group

Geological Age: Paleoproterozoic  



Lithology

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

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 occupies a fault that traverses flat-lying Animikie shaes and grewacke, and a diabase sill some 15 m or more thick. The rocks on the south side of the vein has been down-faulted about 12.2 m, and Animikie sediments above the sill are exposed on the south wall of the vein. The north wall of the vein at the shaft consists of diabase that stands up as a prominent mesa, bounded by cliffs approximately 9 m high. The shaft is on the SE extremity of this mesa. The vein strikes 65 degrees east, and dips vertically or steeply toward the north. The vein material occupies a width of about 0.75 m within a shatter zone 1.8 m wide, and is in the form of 3 veins, each 20 cm or more wide and which unite and divide below the surface. The vein material consists of coarsely crystalline calcite, a small portion of which is clear and transparent, through which pyrite is sparsely disseminated. Silver ore is not known to have been found here (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