Mineral Deposit Inventory for Ontario

Ministry of Energy, Northern Development and Mines

Permanent Link to this Record: MDI31E01SE00135

Deposit: MDI31E01SE00135

General

Mineral Deposit Identification
Deposit Name(s) Virginia Graphite Co. Mill Site - 1910, Tonkin-dupont Property - 1914, South Wilberforce Graphite - 1991
Related Deposit Type None
Deposit Status developed prospect without reserves
Date Created 1991-Mar-25
Date Last Modified 2017-Jan-26
Created By Q Unknown
Revised By A Wilson

Commodities

Primary Commodities: graphite

Location

Township or Area: Monmouth, Monmouth

Latitude: 45° 1' 40.37"    Longitude: 78° 12' 33.86"

UTM Zone: 17    Easting: 719835   Northing: 4989837    UTM Datum: NAD83

Resident Geologist District: Southeastern Ontario

NTS Grid: 31E01SE

Point Location Description: adit

Location Method: amis site visit

Access Description: In the village of Wilberforce, turn onto Schofield Drive, proceed to dam. Park and walk across dam and follow trail to right along the river bank until the old mill foundations. Follow trail across the clearing turning left onto overgrown trail approx 15m of clearing. Proceed up hill to adit.

Exploration and Mining History

1910-14: Virginia Graphite Company – property acquisition, 2 pits established, DD in 1912, some graphite shipped,. 1914: Tonkin-DuPont Graphite Company is successor to Virginia Graphite Company;

Geology

Province: Grenville

Subprovince: Central Metasedimentary Belt

Terrane: Bancroft Terrane

Geochronological Age: 1400-1350 Ma     Geochron. Age Ref.: P3526

Mineral Deposit Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
calcite marble 1 siliceous host

Lithology Comments

10/25/2013 (A Wilson) - The marble is described as medium- to coarse-grained, gneissic, siliceous calcitic marble. It contains 20-60% siliceous impurities and commonly contains thin intercalated units of amphibole-rich metasedimentary rocks. The bedding planes are marked by disseminated graphite flakes ranging from 1/10 to 1/8 of an inch in diameter. The graphite-bearing beds range from seams to beds up to 4 inches in thickness. The bedding strikes N35ºW and dips vertically.

Mineralization

Deposit Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Habit Description
1 graphite economic ore

Mineralization Comments

10/25/2013 (A Wilson) - Satterly estimated that hand-picked material would average 10% graphite. Only a small percentage of the limestone graded 10% and at the time the deposit was not considered to be of economic importance. Flake graphite is found in bands and seams in the marble. A few masses of solid amorphous graphite cut by stringers of flake graphite ranging from 1/20 to 1/5 of an inch in width were observed by Satterly in 1943. Some graphite was shipped from the property in 1911. The mill was constructed at this site. The equipment used at this site was shipped to their property near Maynooth.

Mineral Deposit Details

Deposit Classification
Rank Classification            
1 industrial
Deposit Characteristics
Rank Characteristic            
1 disseminated

References

Book - Mineral occurrences in the Haliburton Area, p. 42-43

Publication Number: ARV52-2     Date: 1943

Author: J. Satterly

Publisher Name: ODM

Reference Location: Southeastern Ontario


Book - Geology of Glamorgan and Monmouth Townships, p. 116-117

Publication Number: OFR5021     Date: 1968

Author: H.S. Armstrong and J. Gittins

Publisher Name: ODM

Reference Location: Southeastern Ontario


Book - Industrial Minerals of the Algonquin Region, p. 146

Publication Number: OFR5425     Date: 1988

Author: W. Martin

Publisher Name: OGS

Reference Location: Southeastern Ontario


Book - Major graphite occurrences within the Frontenac Axis, southeastern Ontario, p. 74

Publication Number: OFR5729     Date: 1990

Author: A. MacKinnon and P.S. LeBaron

Publisher Name: OGS

Reference Location: Southeastern Ontario


Book - Major graphite occurrences within the Frontenac Axis, Eastern Ontario, p. 27

Publication Number: MRC033     Date: 1992

Author: A. MacKinnon and P.S. LeBaron

Publisher Name: OGS

Reference Location: Southeastern Ontario


Book - Mines of Ontario, p. 44

Publication Number: ARV20-1     Date: 1911

Author: T.W. Gibson

Publisher Name: ODM

Reference Location: Southeastern Ontario


Book - Mines of Ontario, p. 41, 48, 162

Publication Number: ARV21-1     Date: 1912

Author: T.W. Gibson

Publisher Name: ODM

Reference Location: Southeastern Ontario


Book - Mines of Ontario, p. 49, 139

Publication Number: ARV22-2     Date: 1913

Author: T.W. Gibson

Publisher Name: ODM

Reference Location: Southeastern Ontario


Book - Mines of Ontario, p. 165

Publication Number: ARV24-1     Date: 1913

Author: T.F. Sutherland

Publisher Name: ODM

Reference Location: Southeastern Ontario


Book - Graphite in Ontario, p. 22-23

Publication Number: IMR020     Date: 1965

Author: D. F. Hewitt

Publisher Name: ODM

Reference Location: Southeastern Ontario


Map - Precambrian Geology, Wilberforce Area

Publication Number: P3526     Scale: 1:50 000    Date: 2003

Publisher Name: OGS

Reference Location: Southeastern Ontario


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