Ontario Geological Survey
Permanent Link to this Record:
MDI42A09SE00031
| Record Name(s) | Reoplata Occurrence - 1990, Consolidated Ranwick Uranium Mines - 1954 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1990-Nov-12 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Gold, Uranium
Secondary Commodities: Asbestos
Township or Area: Munro
Latitude: 48° 36' .31" Longitude: -80° 9' 28.51"
UTM Zone: 17 Easting: 562083.283 Northing: 5383342.941 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 42A09SE
Point Location Description: Drill holes located 2.77 km south and 1.04 km west of the northeast corner of Munro Twp.
Location Method: Conversion from MDI
1949-1950: Reoplata Mines Ltd. was formed and 97 claims were prospected by H. Borgford, G. Borgford, and W. J. Ryan. In 1950, Mining Geophysics Corporation Ltd. completed for Reoplata Mines a magnetic survey as part of an asbestos exploration program (Satterly 1952). Three holes totalling 876 feet were diamond drilled and sparse thread-fibre chrysotile asbestos in serpentinized peridotite was intersected (Hewitt and Satterly 1953). The property was also prospected and sampled for its potential to host placer deposits (The Northern Miner, August 17, 1950). 1952-1953: Reoplata Mines tested the placer gold/uranium potential of the property (in esker sands) by sluicing and drilling. This sampling indicated gold values varying from trace to 0.04 ounce of gold per ton (Ferguson et al. 1971, Reade 1953). 1954: Consolidated Ranwick Uranium Mines acquired the property after work by Reoplata Mines indicated that esker sands and gravels had uranium contents of $2-$4 per ton (The Northern Miner, April 1, 1954).
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Abitibi
Tectonic Assemblage: Stoughton-Roquemaure
Geological Age: Mesoarchean
Dec 07, 2005 (R Degagne) - Placer accumulations of gold and uranium in esker gravels (Vagners 1984; McClenaghan et al. 1988, 1987; Steele 1988 ) occur. Gold tenors indicated (Ferguson et al. 1971) to range from trace to 0.04 ounces of gold per ton and uranium values indicated (The Northern Miner, April 1, 1954) to range from $2-4 per ton are present. Ferguson and Freeman (1978) reported that gold assays ranging from 0.01 to 4.20 ounce of gold per ton were obtained by Reoplata Mines (from concentrates?). Diamond drilling also intersected chrysotile asbestos in serpentinized peridotite of the (Archean) Stoughton-Roquemaure Group (Johnstone and Trowell 1984, 1985; Jensen and Baker 1986; Johnstone 1987; Johnstone and Steele 1989).
| Rock Type | Rank | Composition | Texture | Relationship | Peridotite | 1 | Peridotite; Srp, Asb | Host |
|---|---|---|---|---|
| Gravel | 2 | Esker Gravels; Au, U | Host |
Dec 07, 2005 (R Degagne) - Placer accumulations of gold and uranium in esker gravels (Vagners 1984; McClenaghan et al. 1988, 1987; Steele 1988 ) occur. Gold tenors indicated (Ferguson et al. 1971) to range from trace to 0.04 ounces of gold per ton and uranium values indicated (The Northern Miner, April 1, 1954) to range from $2-4 per ton are present. Ferguson and Freeman (1978) reported that gold assays ranging from 0.01 to 4.20 ounce of gold per ton were obtained by Reoplata Mines (from concentrates?). Diamond drilling also intersected chrysotile asbestos in serpentinized peridotite of the (Archean) Stoughton-Roquemaure Group (Johnstone and Trowell 1984, 1985; Jensen and Baker 1986; Johnstone 1987; Johnstone and Steele 1989).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Asbestos | Economic | Ore | ||||
| 1 | Serpentine | Economic | Gangue | ||||
| 2 | Talc | Economic | Gangue | ||||
| 3 | Chlorite | Economic | Gangue | ||||
| 4 | Carbonate | Economic | Gangue | ||||
| 5 | Magnetite | Economic | Gangue | ||||
| Serpentine | Alteration | Serpentinization | 1 | Replacement | |||
| Talc | Alteration | Serpentinization | 2 | ||||
| Chlorite | Alteration | Chloritic | 3 | ||||
| Carbonate | Alteration | Carbonatization | 4 |
Dec 07, 2005 (R Degagne) - Placer accumulations of gold and uranium in esker gravels (Vagners 1984; McClenaghan et al. 1988, 1987; Steele 1988 ) occur. Gold tenors indicated (Ferguson et al. 1971) to range from trace to 0.04 ounces of gold per ton and uranium values indicated (The Northern Miner, April 1, 1954) to range from $2-4 per ton are present. Ferguson and Freeman (1978) reported that gold assays ranging from 0.01 to 4.20 ounce of gold per ton were obtained by Reoplata Mines (from concentrates?). Diamond drilling also intersected chrysotile asbestos in serpentinized peridotite of the (Archean) Stoughton-Roquemaure Group (Johnstone and Trowell 1984, 1985; Jensen and Baker 1986; Johnstone 1987; Johnstone and Steele 1989).
Dec 07, 2005 (R Degagne) - Diamond drilling also intersected chrysotile asbestos in serpentinized peridotite of the (Archean) Stoughton-Roquemaure Group (Johnstone and Trowell 1984, 1985; Jensen and Baker 1986; Johnstone 1987; Johnstone and Steele 1989).
| Rank | Classification |
|---|---|
| 2 | Metamorphic |
| 1 | Placer |
| Rank | Characteristic |
|---|---|
| 1 | Unconsolidated |
| 2 | Vein |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown |
Date: Feb 04, 1997
Geologist: R Degagne
Notes: N/A
Map - Township of Munro, District of Cochrane, Ontario
Publication Number: M1951-05 Date: 1997
Author: Satterly J., Hogg N.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Quaternary geology of Matheson area, Cochrane District
Publication Number: P2735 Scale: 1:50,000 Date: 1985
Author: Vagners U.J.
Publisher Name: Ontario Geological Survey
Location:
Mono - Gold deposits of Ontario, part 1, districts of Algoma, Cochrane, Kenora, Rainy River, and Thunder Bay
Publication Number: MDC013 Page: 315 Date: 1971
Author: Ferguson S.A., Groen H.A., Haynes R.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Folio - Munro Township, District of Cochrane
Publication Number: GDIF361 Date: 1997
Author: Kirkland Lake RGO
Publisher Name: Ontario Geological Survey
Location:
Map - Black River-Matheson Area
Publication Number: OFM0013 Scale: 1:15,840 Date: 1985
Author: Johnstone R.M., Trowell N.F.
Publisher Name:
Location:
Mono - Mineral occurrences, deposits, and mines of the Black River-Matheson area
Publication Number: OFR5735 Page: 345-348 Date: 1990
Author: Bath A.C.
Publisher Name: Ontario Geological Survey
Location:
Part - Geology of Munro Township
Publication Number: ARV60-08 Date: 1997
Author: Satterly J.
Publisher Name: Ontario Dept. of Mines
Location:
Book - Quaternary geology and geochemical exploration in the Matheson area
Publication Number: MP140.294 Date: 1997
Author: McClenaghan M.B., Lavin O.P., Nichol I., Shaw J.
Publisher Name: Ontario Geological Survey
Location:
Article - Precambrian geology of the Black River-Matheson (BRIM) area, District of Cochrane
Publication Number: MP126.056S Page: 291-296 Date: 1997
Author: Johnstone R.M., Trowell N.F.
Publisher Name: Ontario Geological Survey
Location:
Mono - Ontario occurrences of float, placer gold and other heavy minerals
Publication Number: MDC017 Date: 1978
Author: Ferguson S.A., Freeman E.B.
Publisher Name: Ontario Geological Survey
Location:
Part - Mining operations in 1951
Publication Number: ARV61-02 Date: 1997
Author: Reade M.
Publisher Name: Ontario Dept. of Mines
Location:
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