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Ontario Geological Survey
Permanent Link to this Record:
MDI42D16SW00031
| Record Name(s) | Marathon Black Granite - 1989, D. Petrunka - 1994, Cold Spring Granite Canada Ltd. - 1989 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1996-Dec-17 |
| Date Last Modified | 2024-Aug-19 |
| Created By | |
| Revised By |
Primary Commodities: Granite
Township or Area: McCoy
Latitude: 48° 46' 30.4" Longitude: -86° 24' 25.37"
UTM Zone: 16 Easting: 543565 Northing: 5402626 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42D16SW
Point Location Description: Test block location on map in Assessment file 42D12SW8193
Location Method: Data Compilation
Access Description: GENERAL LOCATION: The property is located 500 m south of Highway 17 in central McCoy Township approximately 7.0 km north-northwest of Marathon (Figure 23). ACCESS: The property can be accessed by a gravel road departing south from Highway 17 at a point approximately 5.2 km west from the turn-off to Marathon.
1985: Noranda Inc. carried out mapping and evaluation. 1989: Cold Spring Granite Canada Ltd. drilled 10 DDH totaling 173.2 m.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 55 | 42D12SW8193 | 42D12SW8193 |
| 2.8708 | 42D16NE0039 | 42D16NE0039 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Syenite | 1 | Augite Rich, Syenitic | Coarse Gr | Host |
|---|
Dec 07, 2005 (W Bellinger) - The claims are underlain by Fe-rich augite syenite (Walker et al. 1992) of the Proterozoic Coldwell alkalic complex. Geological mapping over the area was done by Puskas (1967) and recently by Walker et al. (1991, 1992, 1993). Walker et al. (1992) described the iron-rich augite syenite as follows: The iron-rich augite syenite appears to be a low angle sheet-like intrusion, which dips approximately 15 degrees toward the centre of the complex. It intrudes the basaltic xenoliths of the roof pendant and the Eastern and Western Gabbro, and it has inclusions of recrystallized amphibole quartz syenite. A variation in mineralogy from the bottom to the top through the sheet is present and consists of: fayalite-iron-rich, augite-magnetite syenite; iron-rich augite syenite; fayalite-iron-rich augite syenite; and amphibole syenite.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Augite | Economic | Ore | ||||
| 2 | Fayalite | Economic | Ore | ||||
| 3 | Feldspar | Economic | Ore | ||||
| 4 | Amphibole | Economic | Ore | ||||
| 1 | Magnetite | Economic | Gangue |
Dec 07, 2005 (W Bellinger) - Walker et al. (1992) described the mineralogy of the iron-rich augite syenite: Iron-rich augite syenite, which forms the majority of the intrusion, typically contains iridescent tabular to lath-shaped feldspars with cryptoperthitic intergrowths and up to 30% interstitial, iron-rich augite. Variable amounts of fayalite, amphibole, aenigmatite and rare quartz occur in the subunit. The rock is generally black to olive-brown, coarse grained and massive. Physical property testing gave the following results: Bulk Specific Gravity: 2.738 %, Absorption 2 hrs.: Not Available, 48 hrs.: 0.560, Compressive Strength: 20,130 (psi) dry, 18,420 (psi) wet, Modulus of Rupture: 1,420 (psi) dry, 1,530 (psi) wet. Testing done by Twin City Testing Corp., St. Paul, Minnesota (Assessment Files, Thunder Bay).
Date: Jul 29, 2024
Geologist: Sheree Hinz
Notes: Site was visited in 2024 by S.Hinz, J.Jonsson, and P.Hinz as part of a historic building stone quarry tour to evaluate future potential for building stone in northwestern Ontario.
Book - SURV OF GEOL AND GEOMORPH OF NEYS PROV PARK,ENV PLAN SERIES,MNR
Publication Number: RPT Date: 1974
Author: Billings, M.D.
Publisher Name:
Location: Thunder Bay RGP
Map - Port Coldwell area, District of Thunder Bay
Publication Number: P0114 Scale: 1:31,680 Date: 1997
Author: Puskas F.P.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Dimensional Stone Occurrences and Deposits in Northwest Ontario
Publication Number: OFR5890 Page: 124-127 Date: 1994
Author: Hinz P., Landry R.M., Gerow M.C.
Publisher Name: Ontario Geological Survey
Location:
Map - Precambrian Geology, Port Coldwell Complex, East Half
Publication Number: P3233 Scale: 1:20,000 Date: 1993
Author: Walker E.C., Sutcliffe R.H., Shaw C.S.J., Shore G.T., Penczak R.S.
Publisher Name: Ontario Geological Survey
Location:
Mono - Building stones of Ontario, part 5, granite and gneiss
Publication Number: IMR019 Page: 36-38 Date: 1997
Author: Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
Publication - A Contribution to the Petrology of the Coldwell Alkaline Complex; Geological Survey of Canada, Bulletin 287
Publication Number: GSC Bull 287 Date: 1980
Author: Currie, K.L.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/106630
MonoMap - Geology of the Port Coldwell area, District of Thunder Bay
Publication Number: OFR5014 Date: 1997
Author: Puskas F.P.
Publisher Name: Ontario Dept. of Mines
Location:
Article - Geology of the Coldwell alkaline complex
Publication Number: MP157.018 Date: 1998
Author: Walker E.C., Sutcliffe R.H., Shaw C.S.J., Shore G.T.
Publisher Name: Ontario Geological Survey
Location:
Article - Geology of the Port Coldwell alkalic complex
Publication Number: MP160.019 Page: 108-120 Date: 1997
Author: Walker E.C., Sutcliffe R.H., Shaw C.S.J., Shore G.T., Penczak R.S.
Publisher Name: Ontario Geological Survey
Location:
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For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office