Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI31D10NW00002

Record: MDI31D10NW00002

General

Mineral Record Identification
Record Name(s) Coboconk - 1982
Related Record Type Simple
Related Record(s)
Record Status Discretionary Occurrence
Date Created 1982-Jan-21
Date Last Modified 2022-Apr-14
Created By
Revised By

Commodities

Primary Commodities: Bentonite



Location

Township or Area: Somerville

Latitude: 44° 39' 21.75"    Longitude: -78° 47' 41.25"

UTM Zone: 17    Easting: 674841.489   Northing: 4947107.725    UTM Datum: NAD83

Resident Geologist District: Southern Ontario

NTS Grid: 31D10NW

Point Location Description: Precise

Location Method: Conversion from MDI

Access Description: SW of Coboconk, NE end of Balsam Lake. The occurrence is in the west quarry near Coboconk.





Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
Limestone 1 Host

Lithology Comments

Dec 07, 2005 (D Laidlaw) - Bentonite occurs over a 6 inch zone interbedded with limestone of the Lowville Formation of the Black River Group of Ordovician age. It is pale olive in colour and is 13 feet below surface (NMI File, 31D/10 Bentonite 1).




Mineralization

Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Alteration Style
1BentoniteEconomicOre

Mineralization Comments

Dec 07, 2005 (D Laidlaw) - Composition is about 80% illite, 15%-20% montmorillonite and trace chlorite. Also present are opaque and non-opaque heavy minerals (NMI File, 31D/10 Bentonite 1).



Mineral Record Details

References

Publication - Preliminary Map Fenelon Falls Victoria, Peterborough and Haliburton Counties Ontario; Geological Survey of Canada, Paper no. 52-31

Publication Number: GSC Paper 52-31 Page: 7-8  Date: 1996

Author: Caley, J F; Liberty, B A

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/108330


MonoMap - Industrial minerals of the Algonquin region

Publication Number: OFR5425 Page: 15  Date: 1983

Author: Martin W.

Publisher Name: Ontario Geological Survey

Location:


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For detailed information regarding this mineral record please contact the Southern Ontario Resident Geologist District Office