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Ontario Geological Survey
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MDI42D16SW00026
| Record Name(s) | Anaconda 3 - 1962 |
|---|---|
| Related Record Type | Partial |
| Record Status | Occurrence |
| Date Created | 1991-Mar-27 |
| Date Last Modified | 2022-Jan-05 |
| Created By | Q Unknown |
| Revised By | Therese Pettigrew |
Primary Commodities: Copper, Platinum Metals, Nickel
Township or Area: O'Neill
Latitude: 48° 47' 43" Longitude: -86° 18' 51.87"
UTM Zone: 16 Easting: 550351 Northing: 5404925 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42D16SW
Point Location Description: Precise
Location Method: Conversion from MDI
Access Description: The Marathon property is located on the north shore of Lake Superior approximately 290 km east of Thunder Bay, Ontario and 12 km from the town of Marathon. The Marathon claim group is accessible from Highway 17 by a gravel road, the last 4.8 km of which was constructed by Anaconda.
1962: Anaconda Company (Canada) Ltd. conducted geological mapping and trenching. 1963: Anaconda conducted an IP survey. 1964-7: Anaconda drilled 171 DDH totalling 36,537m and conducted airborne and ground mag surveys. 1964: Anaconda took a small bulk sample (5200 lb). 1966: Anaconda took a 150 ton sample. 1974-76: various studies were conducted. 1976: claims were converted to leases. 1982: Anaconda relogged 10 historic drill holes and reevaluated the property. 1984: Fleck Resources Ltd. purchased the property from Anaconda. 1985-86: Fleck resampled historic core, re-established the grid, drilled 37 DDH totalling 3852 m, trenched and sampled. 1986: Fleck blasted 40 tons of mineralized representative material (10 tons from 4 pits) and sent it for testing, and conducted geological mapping. 2003: Marathon PGM Corp. acquired the property. 2004-6: Marathon PGM carried out geological mapping, prospecting, trenching, and drilling. 2007-08: Marathon PGM drilled 226 DDH totaling 46,166 m including 154 DDH totaling 32344.8 m on the Anaconda 3 showing. 2011: Stillwater Canada acquired the leases.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 63.4851 | 42D16SE0021 | 42D16SE0021 |
| 63.4647 | 42D16SW0030 | 42D16SW0030 |
| 2.42164 | 20000013681 | 20000013681 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Geological Age: Archean
Sep 29, 2015 (Therese Pettigrew) - The area is predominantly underlain by gabbro belonging to the Port Coldwell alkalic complex. To the east, the gabbro intrudes rocks belonging to an older metavolcanic-metasedimentary assemblage. Numerous, eastward-dipping dikes of larvikite syenite and younger, lamprophyre dikes intrude the gabbro (Shklanka, 1969).
| Rock Type | Rank | Composition | Texture | Relationship | Gabbro | 1 | Host |
|---|---|---|---|---|
| Terrigenous-Clastic-Unsubdivided | 2 | Adjacent | ||
| Mafic lava flow-unsubdivided | 3 | Adjacent |
Sep 29, 2015 (Therese Pettigrew) - The margin of the Coldwell Complex is composed of two gabbroic phases: an early (olivine gabbro) phase, and a later olivine-biotite gabbro. The later gabbro is discontinuous along the marginal contact, dips moderately westwards, and locally contains disseminated chalcopyrite and pyrrhotite with variable concentrations of Platinum Group Elements. The intrusive rocks of the Coldwell Alkalic Complex consist of an olivine gabbro outer zone and a syenitic core. The mineralized part of the complex is contained within the outer zone olivine gabbro. There, olivine gabbro was intruded by an olivine-biotite gabbro containing sulfide mineralization. This later intrusion is focused along the Complex/metavolcanic contact where it has almost completely displaced the earlier olivine gabbro towards the core of the Complex. The olivine-biotite gabbro intruded parallel to or slightly obliquely to the igneous layering exhibited in the early gabbro. Lateral continuity of this unit ranges from 500 m to 10 km. thickness is on the order of 20 to 100 m. The abundance of olivine-biotite gabbro decreases rapidly up-section, where it becomes a series of thin and discontinuous lenses with minor sulfide mineralization. The Two Duck Lake Gabbro, which contains the Cu-Ni-PGE mineralization, ranges from medium through coarse and very coarse-grained to pegmatitic. The medium-grained unit varies from olivine-biotite to olivine-biotite-hornblende gabbro in composition. Olivine and biotite contents range from 2 to 10 ft. Coarse-grained olivine-biotite gabbro (7c) represents the bulk of the Two Duck Lake intrusion. Olivine content ranges from 1 to 5% and biotite ranges from 5 to 15%. The very coarse-grained olivine-biotite gabbro contains olivine and biotite contents similar to the coarse- grained gabbro but may contain up to 15% Fe-Ti oxides (ferro-gabbro). Pegmatitic, olivine-biotite or olivine-hornblende-biotite gabbro, which may contain variable Fe-Ti oxides (up to 10%), is a volumetrically small unit. This unit is extremely discontinuous and has patchy crosscutting and oblique lenses-like forms (AFRI 42D16SE0021).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrrhotite | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Magnetite | Economic | Ore | ||||
| 4 | Pentlandite | Economic | Ore | ||||
| 5 | Pyrite | Economic | Ore | ||||
| 10 | Violarite | Economic | Ore | ||||
| 6 | Pyroxene | Economic | Gangue | ||||
| 7 | Plagioclase | Economic | Gangue | ||||
| 8 | Olivine | Economic | Gangue | ||||
| 9 | Biotite | Economic | Gangue |
Dec 06, 2018 (Therese Pettigrew) - Assays from the 2007-8 drill program returned values up to 2.184% Cu, 2651 ppm Ni, 3516 ppb Au, 27658 ppb Pt and 30716 ppb Pd. The highest Pt and Pd values were found in DDH M-07-237. The highest Cu values were found in DDH M-07-384 (Assessment file 20000013681).
| Rank | Classification |
|---|---|
| 1 | Magmatic |
| Rank | Characteristic |
|---|---|
| 1 | Intrusive |
MonoMap - Geology of Cirrus Lake-Bamoos Lake area, District of Thunder Bay
Publication Number: R043 Scale: Date: 1997
Author: Milne V.G.
Publisher Name: Ontario Dept. of Mines
Mono - Copper, nickel, lead and zinc deposits of Ontario
Publication Number: MDC012 Scale: Date: 1969
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Map - Bamoos Lake sheet, Thunder Bay District
Publication Number: M2099 Scale: Date: 1997
Author: Milne V.G.
Publisher Name: Ontario Dept. of Mines
Map - Manitouwadge sheet, districts of Thunder Bay and Algoma, geological compilation series
Publication Number: P0494 Scale: 1:126,720 Date: 1997
Author: Milne V.G.
Publisher Name: Ontario Dept. of Mines
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
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
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For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office