Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI31D15SW00016

Record: MDI31D15SW00016

General

Mineral Record Identification
Record Name(s) Otter Lake - 1910
Related Record Type Simple
Related Record(s)
Record Status Occurrence
Date Created 1991-Feb-20
Date Last Modified 2022-Mar-04
Created By
Revised By

Commodities

Primary Commodities: Graphite

Secondary Commodities: Marble (Building Stone)



Location

Township or Area: Lutterworth

Latitude: 44° 48' 24.52"    Longitude: -78° 46' 58.35"

UTM Zone: 17    Easting: 675330   Northing: 4963881    UTM Datum: NAD83

Resident Geologist District: Southern Ontario

NTS Grid: 31D15SW

Point Location Description: gf symbol on eastern end of Otter Lake

Location Method: Data Compilation

Access Description: At SE end of Otter Lake.



Geology

Province: Grenville

Subprovince: Central Metasedimentary Belt

Geological Age: Mesoproterozoic  



Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
Calcite Marble 1 Tectonic Breccia Host

Lithology Comments

Nov 06, 2013 (A Wilson) - Graphite occurs within tectonically brecciated marble. Large blocks of disrupted intrusions of granite and assorted metasedimentary rocks also are found adjacent to the occurrence.




Mineralization

Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Alteration Style
1GraphiteEconomicOre
2PyriteEconomicGangue
3PyrrhotiteEconomicGangue

Mineralization Comments

Nov 06, 2013 (A Wilson) - A grab sample of marble collected by the OGS returned an analysis of 0.9% non-carbonate carbon. No anomalous or otherwise significant metallic values were found within the clastic metasedimentary blocks. Much of the crystalline limestone in the Township of Lutterworth constitutes a veritable marble. This limestone would yield excellent lime, and would afford a fine material for building stone. It is, however, rather coarse-grained for very fine work, or for statuary purposes. The marble has not been tested for its suitability as a dimension stone.



Mineral Record Details

References

Publication - Geology of the Haliburton and Bancroft areas, Province of Ontario; Geological Survey of Canada, Memoir no. 6

Publication Number: GSC Memoir 6 Scale:     Date: 1910

Author: Adams, F D, Barlow, A E.

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/100481


Part - The limestones of Ontario

Publication Number: ARV13-02 Scale:     Date: 1998

Author: Miller W.G.

Publisher Name: Ontario Bureau of Mines

Location:


MonoMap - Industrial minerals of the Algonquin region

Publication Number: OFR5425 Scale:     Date: 1983

Author: Martin W.

Publisher Name: Ontario Geological Survey

Location:


MonoMap - Precambrian geology, Digby-Lutterworth area

Publication Number: R269 Scale:     Date: 1990

Author: Easton R.M.

Publisher Name: Ontario Geological Survey

Location:


Map - Precambrian geology, Digby-Lutterworth area

Publication Number: M2530 Scale: 1:20,000    Date: 1990

Author: Easton R.M., Van Kranendonk M., Sanderson D.

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