Ontario Geological Survey
Permanent Link to this Record:
MDI52B12NE00003
| Record Name(s) | Plateau Lake - 1903, Andowan #12 - 1948 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1979-Jun-01 |
| Date Last Modified | 2022-Feb-14 |
| Created By | |
| Revised By |
Primary Commodities: Copper, Nickel, Platinum, Palladium, Gold
Secondary Commodities: Cobalt, Silver
Township or Area: McAlpine Lake Area, Pickerel Lake Area
Latitude: 48° 43' 18.84" Longitude: -91° 30' 2.19"
UTM Zone: 15 Easting: 610277 Northing: 5397626 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52B11NW, 52B12NE
Point Location Description: 3 shafts, 2 pits location from AMIS
Location Method: Data Compilation
Access Description: The property is accessible by Highway 11, then by foot trail for 1km west along a power transmission line, which crosses Highway 11 approximately 12km west of the Sapawe junction.
1903-04: R.M. Pattison discovered and staked the showing. Prior 1937: 3 shafts, 2 pits. 1948: Andowan Mines conducted geophysical surveys and diamond drilling, 3 pits sunk. 1957: Property was owned by W.A.Gray. Property was examined by Steeprock Iron Mines Ltd., but the amount and nature of the work is unknown. 1965: Area visited by E. G. Pye, report written. 1969: Staked by R. Threw. 1970: Geochemical survey carried out by R. Threw. 1973: Ground Electromagnetic and Magnetometer surveys conducted by R. Threw. 1979: Property staked by K. Kuhner, sampling. 1981: Claims TB534962, 580186, 582042, and TB582043 staked for Quetico Exploration and Development Company Limited. 1986: Wolfstar Resources staked the property and carried out sampling. 1991-92: M. Andrews and C. Hicks staked the property and carried out stripping, trenching, sampling, and drilled 1 DDH totalling 30.48 m. 2001: East West Resources Ltd. carried out line cutting and a magnetometer survey. 2014: M. Frymire and A. Schneider staked the property and carried out prospecting and sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.57365 | 20000013757 | 20000013757 |
| OP92-481 | 52B14SE0019 | 52B14SE0019 |
| 2.20887 | 52B11NW2002 | 52B11NW2002 |
| 63.3608 | 52G03SE0028 | 52G03SE0028 |
| OP92-821 | 52B14SE0028 | 52B14SE0028 |
| 63.6245 | 52B11NE8103 | 52B11NE8103 |
Province: Superior
Subprovince: Quetico
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Hornblendite | 1 | Hornblendite To Clinopyroxenite | Host |
|---|---|---|---|---|
| Gabbro | 2 | Near | ||
| Terrigenous-Clastic-Unsubdivided | 3 | Near |
Aug 27, 2019 (Therese Pettigrew) - The Plateau Lake Intrusion is a poorly exposed, moderately deformed, possibly folded body about 650 m in length and 100 m in width. It is composed of altered, medium- to coarse-grained hornblendite with a small core of altered, fine- to medium-grained, hornblende clinopyroxenite. Both rock types contain large oikocrysts of hornblende. A larger dioritic to gabbroic body occurs a short distance east of the ultramafic intrusion. Both intrusions were emplaced into turbiditic sediments and app:0ear subconcordant to bedding (MacTavish, 1999). Both intrusions were emplaced sub-concordantly within the surrounding metasedimentaiy rocks, and appear to have been deformed along with the sediments (Cherry and MacDonald, 1988).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Pyrrhotite | Economic | Ore | ||||
| 3 | Pentlandite | Economic | Ore | ||||
| 4 | Pyrite | Economic | Ore |
Aug 27, 2019 (Therese Pettigrew) - Sulphides were observed only within the ultramafic intrusion and are concentrated within altered hornblende clinopyroxenite. Sulphide content ranges from less than 10% to greater than 40% finely disseminated, locally net--textured chalcopyrite, pyrrhotite, pentlandite, and rare pyrite. The average sulphide content is between 5% and 15% with chalcopyrite the dominant phase. Base and precious metal contents range up to 4.4% Cu, 0.73% Ni, 1028 ppb Pt, 686 ppb Pd, and 686 ppb Au (MacTavish, 1999). Sampling done in 1986 returned up to 4.4% Cu, 0.25% Ni, 470 ppb Pt, 125 ppb Pd, and 250 ppb Au. Sampling done in 1991-92 returned 2.14% Cu, 7688 pm Ni, 746 ppb Pd, 445 ppb Pt, 435 ppb Au, and 583 ppm Co. DDH 92-A assayed up to 1.013% Cu, 0.769% Ni, 583 ppm Co, 282 ppb Au, 390 ppb Pt, and 746 ppb Pd (Assessment report 52B14SE0019).
Mono - Property visits and reports of the Atikokan economic geologist, 1979-1983, Atikokan geological survey
Publication Number: OFR5539 Scale: Date: 1985
Author: Schnieders B.R., Dutka R.J.
Publisher Name: Ontario Geological Survey
Location:
Part - Geology and ore deposits of the Atikokan area
Publication Number: ARV48-02.001 Scale: Date: 1997
Author: Moore E.S.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Copper, nickel, lead and zinc deposits of Ontario
Publication Number: MDC012 Scale: Date: 1969
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - The Mafic-Ultramafic Intrusions of the Atikokan-Quetico Area, Northwestern Ontario
Publication Number: OFR5997 Scale: Date: 1999
Author: MacTavish A.D.
Publisher Name: Ontario Geological Survey
Location:
Compend - The platinum group of elements in Ontario
Publication Number: OFR5681 Scale: Date: 1988
Author: Macdonald A.J., Cherry M.E.
Publisher Name: Ontario Geological Survey
Location:
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