Ontario Geological Survey
Permanent Link to this Record:
MDI31L07SW00014
Record Name(s) | Purdy Mine - 1953 |
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Related Record Type | Compound |
Related Record(s) | |
Record Status | Past Producing Mine Without Reserves or Resources |
Date Created | 1982-Mar-05 |
Date Last Modified | 2022-Apr-04 |
Created By | |
Revised By |
Primary Commodities: Mica
Secondary Commodities: Feldspar (Nonmetals), Uranium
Township or Area: Mattawan, Mattawan, Mattawan
Latitude: 46° 19' 2.19" Longitude: -78° 54' 12.13"
UTM Zone: 17 Easting: 661415 Northing: 5131436 UTM Datum: NAD83
Resident Geologist District: Sudbury
NTS Grid: 31L07SW
Point Location Description: approximate centre of mine hazards
Location Method: AMIS Site Visit
Access Description: From Mattawa, drive northwest on highway 533 a distance of 13.4km. Turn south immediately after Snake Creek Road onto logging road and take south fork as road branches. Continue on main track and drive 15.5km (gravel/sand timber road) to site (last 5.2km is better accessed by ATV).
1941-1953: Purdy Mica Mines Ltd. – in production. 1949-1953: Purdy Mica Mines Ltd. – in production
Province: Grenville
Subprovince: Central Gneiss Belt
Terrane: Tomiko
Geological Age: Mesoproterozoic
Rock Type | Rank | Composition | Texture | Relationship | Tonalite | 1 | Tonlaite To Granodiorite | Gneissic | Contains |
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Gneiss-Unsubdivided | 2 | Gneissic | Contains | |
Pegmatite | 3 | Host |
Jul 06, 2012 (A Wilson) - The Purdy Mine consisted of a series of pegmatite dikes that varied in width from 6 to 20 feet (2 to 6 m) for an average of 10 to 15 feet (3 to 5 m). They are 200 to 400 feet long and occur within an area 400 to 500 feet wide and 1600 feet long. The dikes are arcuate or S-shaped and rarely exceed 200 feet in depth extent. Two dikes were opened to a depth of 150 feet.
Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
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1 | Albite | Economic | Ore | ||||
2 | Muscovite | Economic | Ore | ||||
3 | Uraninite | Economic | Gangue | ||||
4 | Euxenite | Economic | Gangue | ||||
5 | Allanite | Economic | Gangue |
Jul 06, 2012 (A Wilson) - The yield of rough mica from the mine was 2.5% of the rock. The yield of sheet mica was 18.1% of the mica produced, or 0.45% of the rock. These figures are surprisingly low, given the spectacular crystals of muscovite that were reported, the largest being 9 by 7 feet by nearly 3 feet thick. The dikes are composed of quartz, pink potash feldspar and albite, with muscovite and biotite as characterizing accessories. Minor accessory minerals include epidote, chlorite, garnet, pyrite, euxenite, uraninite, beryl, allanite and monazite. Muscovite commonly occurred in the hanging-wall or footwall sections of the dikes. In 1952 some beneficiation tests were performed on material from the mine waste dumps. Crushing, screening, air classification, and hammer mill pulverizing produced mica concentrates down to 0.21 mm. According to Collings and Andrews mica recovery, “. . .was estimated as 84%. Biotite appeared concentrated in the –1.7 mm fraction, from which it could be separated by magnetic separation. Recovery of scrap and small sheet mica thus appears possible.” A grab sample of feldspar collected by the OGS in 2003 assayed 1.25 ppm Cs and 239 ppm Ba.
Rank | Classification |
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1 | Pegmatite |
Rank | Characteristic |
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1 | Intrusive |
Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
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Regular | 91 | 5 |
Year | Tonnes | Commodities | Reference | Comment |
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1953 | 1335 | OFR6068 p.66 | 2,942,786 pounds produced |
Publication - DEMR 1969, NMI 31L/7 MIC1
Publication Number: Date: 1969
Author:
Publisher Name: DEMR
Location:
Publication - Mica Deposits of Canada; Geological Survey of Canada, Economic Geology Series 19
Publication Number: Econ Geol 19 Date: 1960
Author: Hoadley, J W
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/102453
Part - Geology of the Mattawan-Olrig area
Publication Number: ARV53-06.001 Page: 33-40 Date: 1997
Author: Harding W.D.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Pegmatite mineral resources of Ontario
Publication Number: IMR021 Page: 30-35 Date: 1997
Author: Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
Publication - RES/GEO.1990 CLIPPINGS `PURDY..`
Publication Number: Date: 1996
Author:
Publisher Name:
Location: Sudbury RGO
Map - Mattawan-Olrig area, District of Nipissing, Ontario
Publication Number: ARM53D Scale: 1:63,360 Date: 1997
Author: Harding W.D.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Precambrian Geology, Songris Area
Publication Number: P2847 Scale: 1:50,000 Date: 2006
Author: Easton R.M.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology and Mineral Potential of the Eastern Tomiko Terrane, Grenville Province
Publication Number: OFR5554 Page: 68-69 Date: 2006
Author: Easton R.M.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, Mattawa-Deep River area (western half), District of Nipissing
Publication Number: P1196 Scale: 1:63,360 Date: 1976
Author: Lumbers S.B.
Publisher Name: Ontario Division of Mines
Location:
Mono - Report on the Eau Claire mica properties, Mattawan Township
Publication Number: PR1942-01 Date: 1998
Author: Thomson J.E.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Industrial Mineral Assessment and Sampling of Mica in Central and Eastern Ontario
Publication Number: OFR6086 Page: 66-68 Date: 2002
Author: Watts, Griffis and McOuat Ltd., Ontario Geological Survey
Publisher Name: Ontario Geological Survey
Location:
Book - Summary report no. 5: mica and vermiculite; Mineral Sciences Laboratories, CANMET Report CM90-3E. 89 p.
Publication Number: Date: 1989
Author:
Publisher Name:
Location:
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