Ontario Geological Survey
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MDI42D16SW00023
| Record Name(s) | Marathon PGM-Cu Project - 2003, Anaconda American Brass Ltd. - 1963, Anaconda 1 - 1963 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Developed Prospect With Reported Reserves or Resources |
| Date Created | 1983-Mar-09 |
| Date Last Modified | 2022-Mar-14 |
| Created By | |
| Revised By |
Primary Commodities: Copper, Platinum Metals
Secondary Commodities: Gold, Silver
Township or Area: Seeley Lake Area
Latitude: 48° 48' 3.2" Longitude: -86° 18' 44.24"
UTM Zone: 16 Easting: 550501 Northing: 5405550 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42D16SW
Point Location Description: Precise
Location Method: Data Compilation
1920s-1940s: exploration for copper and nickel deposits, with discovery of titaniferous magnetite and disseminated chalcopyrite occurrences. 1963: Anaconda acquired the property, doing exploration work including 36,531 m of drilling in 173 DDH, and discovering a large Cu-PGM deposit. Anaconda carried out a test pitting program that recovered 350 tonnes of material and had it tested at its Extraction Metallurgy Research Division facilities. Anaconda discontinued work in the 1980s due to low metal prices. 1985: Fleck purchased the property and focussed on the PGEs in the deposit. Fleck conducted an exploration program that included reassaying the Anaconda drill core, trenching, bulk sampling and drilled 3,615 m in 37 DDH. 1986: A feasibility study conducted by H. A. Symons indicated a low internal rate of return, which was confirmed by Teck Corporation, who concluded the project was uneconomic due to low metal prices. 1987: Euralia Mining Ltd. signed a joint venture agreement with Fleck. 1989: BHP Engineering Pty Ltd. carried out a prefeasibility study for Euralia. Euralia resampled drill core and retained Geostat Systems International to develop a block model of the Marathon deposit. 1998: Fleck changed its name to PolyMet Mining Corp. 2000: Geomanque signed a joint venture agreement with Polymet. Geomaque carried out a study of the economic potential of the Marathon deposit and drilled 15 DDH totalling 3158 m. 2003: Marathon PGM Corp. acquired the deposit from PolyMet in December 2003 and drilled approximately 65,000 m in 320 holes from 2004 through 2009. A feasibility study was published in 2008 and updated in January 2010. 2010: Stillwater Mining Company acquired all outstanding shares of Marathon PGM and formed a Canadian corporation, Stillwater Canada Inc., on Dec 31, 2010. Stillwater began environmental site assessment and permitting. 2012: MC Mining Ltd. purchased a 25% interest in Stillwater Canada Inc. 2014: Stillwater suspended the environmental site assessment process.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 63.4851 | 42D16SE0021 | 42D16SE0021 |
| 63.4647 | 42D16SW0030 | 42D16SW0030 |
| 63.4745 | 42D16SW0018 | 42D16SW0018 |
| 2.25022 | 42D16SW2009 | 42D16SW2009 |
| 2.13027 | 42F05SE0005 | 42F05SE0005 |
| 2.2011 | 42D16SE0046 | 42D16SE0046 |
| 2.42164 | 20000013681 | 20000013681 |
Jan 09, 2015 (Therese Pettigrew) - 01/08/2015 (T Pettigrew) – The Marathon PGM-Cu deposit is hosted within the Eastern Gabbro Series of the Proterozoic Coldwell Complex which intrudes and bisects the much older Archean Shreiber-Hemlo Greenstone Belt. The sub-circular complex has a diameter of 25 km and a surface area of 580 square km. Mineralization of the Marathon PGM-Cu deposit is part of a very large magmatic system that consists of at least three cross-cutting intrusive olivine gabbro units that comprise the Eastern Gabbro Series of the Coldwell Complex. In order of intrusion, the three gabbroic units consist of Layered Gabbro Series, Layered Magnetite Olivine Cumulate (LMOC) and Two Duck Gabbro (TD Gabbro). The relative size and abundance of the gabbroic units decrease in the order Layered Gabbro Series>TD Gabbro>>LMOC. Lat quartz syenite and 0 for Cu-PGM mineralization and is the focus of exploration (Murahwi et al, 2010).
| Rock Type | Rank | Composition | Texture | Relationship | Gabbro | 1 |
|---|
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 5 | Chalcopyrite | Economic | Ore | ||||
| 10 | Magnetite | Economic | Ore | ||||
| 15 | Pentlandite | Economic | Ore | ||||
| 20 | Pyrite | Economic | Ore |
Jan 09, 2015 (Therese Pettigrew) - The TD Gabbro is the dominant host rock for Cu-PGM mineralization and is the focus of exploration. The mineralized zones occur as shallow dipping subparallel lenses that follow the basal gabbro contact and are labeled as footwall, main and hanging wall zones and the W Horizon. The Main Zone is the thickest and most continuous zone. Additional accumulations of Cu-PGM mineralization are associated with LMOC and occur in the hanging wall of the deposit (Murahwi et al, 2010).
| Rank | Classification |
|---|---|
| 1 | Magmatic |
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Marathon Deposit Pit | 2021 | Inferred Mineral Resource | 6931000 | Generation Mining 2021 Feasibility Study, p. 14-23 | 6,931,000 T for 95,000 oz Pd, 32,000 oz Pt, 26 Mlb Cu, 17,000 oz Au, 345,000 oz Ag | Copper 0.17 %, Gold 0.08 g/t, Palladium 0.43 g/t, Platinum 0.14 g/t, Silver 1.55 g/t |
| Marathon Deposit Pit | 2021 | Probable Mineral Reserve | 32610000 | Generation Mining 2021 Feasibility Study, p. 1-15 | 32,610,000 T for 537,000 oz Pd, 153 Mlb Cu, 64,000 oz Au, 176,000 oz Pt, 1,616,000 oz Ag | Copper 0.213 %, Gold 0.061 g/t, Palladium 0.512 g/t, Platinum 0.168 g/t, Silver 1.541 g/t |
| Marathon Deposit Pit | 2021 | Proven Mineral Reserve | 85091000 | Generation Mining 2021 Feasibility Study, p. 1-15 | 85,091,000 T for 1,805,000 oz Pd, 581,000 oz Pt, 379 Mlb Cu, 191,000 oz Au, and 3,719,000 oz Ag | Copper 0.202 %, Gold 0.07 g/t, Palladium 0.66 g/t, Platinum 0.212 g/t, Silver 1.359 g/t |
| Marathon Deposit Pit | 2021 | Measured + Indicated Resource | 202806000 | Generation Mining 2021 Feasibility Study, p. 14-23 | 202,806,000 T for 3,599,000 oz Pd, 1,211,000 oz Pt, 875 Mlb Cu, 444,000 oz Au, 10,544,000 oz Ag | Copper 0.2 %, Gold 0.07 g/t, Palladium 0.55 g/t, Platinum 0.19 g/t, Silver 1.62 g/t |
| Marathon PGM-Cu Deposit | 2009 | Probable Mineral Reserve | 204455000 | Technical Report on the Updated Mineral Resource Estimate and Feasibility Study for the Marathon PGM-Cu Project, Marathon, Ontario, Canada | Copper 0.194 Percent, Gold 0.075 Grams per Tonne, Palladium 0.65 Grams per Tonne, Platinum 0.235 Grams per Tonne, Rhodium 0.0069 Grams per Tonne, Silver 1.5 Grams per Tonne | |
| Marathon PGM-Cu Deposit | 2009 | Proven Mineral Reserve | 58902000 | Technical Report on the Updated Mineral Resource Estimate and Feasibility Study for the Marathon PGM-Cu Project, Marathon, Ontario, Canada | Copper 0.291 Percent, Gold 0.081 Grams per Tonne, Palladium 0.794 Grams per Tonne, Platinum 0.233 Grams per Tonne, Rhodium 0.0059 Grams per Tonne, Silver 1.61 Grams per Tonne | |
| Marathon PGM-Cu Deposit - Pit Shell | 2009 | Measured + Indicated Resource | 97400000 | Technical Report on the Updated Mineral Resource Estimate and Feasibility Study for the Marathon PGM-Cu Project, Marathon, Ontario, Canada | Contained Metal: 2349000 oz Pd, 728000 oz Pt, 266000 oz Au, 5205000 oz Ag, 19200 oz Rh, 583000000 lb Cu. | Copper 0.27 Percent, Gold 0.09 Grams per Tonne, Palladium 0.75 Grams per Tonne, Platinum 0.23 Grams per Tonne, Rhodium 0.006 Grams per Tonne, Silver 1.7 Grams per Tonne |
Map - Bamoos Lake sheet, Thunder Bay District
Publication Number: M2099 Date: 1997
Author: Milne V.G.
Publisher Name: Ontario Dept. of Mines
Location:
Publication - Feasibility Study, Marathon Palladium & Copper Project
Publication Number: 2021 NI 43-101 Date: 2021
Author: Gignac, L-P., Murphy, P., Champagne, A., Hall, C.N., Puritch, E.J., Barry, J., Brown, F.H., Burga, D., Mackie, B.W., Pitman, P., Raponi, T.R.
Publisher Name: G Mining Services for Generation Mining
Location: SEDAR
Publication - Technical Report on the Updated Mineral Resource Estimate and Feasibility Study for the Marathon PGM-Cu Project, Marathon, Ontario, Canada
Publication Number: 2009 NI 43-101 Date: 2009
Author:
Publisher Name: Micon International Ltd.
Location:
Publication - Technical Report on the Updated Feasibility Study for the Marathon PGM-Cu Project, Marathon, Ontario, Canada
Publication Number: 2010 NI 43-101 Date: 2010
Author: Murahwi, C., Shoemaker, S., Gowans, R., Lemieux, J., Jacobs, C.
Publisher Name: Micon International Ltd. for Marathon PGM Corporation
Location:
Publication - Marathon PGM Corporation; Marathon Platinum Group Metals – Copper Project; Project Description
Publication Number: Date: 2010
Author:
Publisher Name: EcoMetrix Inc. & True Grit Consulting Ltd.
Location:
Map - Bamoos Lake sheet, Pic River area, District of Thunder Bay
Publication Number: P0234 Scale: 1:15,840 Date: 1997
Author: Milne V.G.
Publisher Name: Ontario Dept. of Mines
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:
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
Location:
MonoMap - Geology of Cirrus Lake-Bamoos Lake area, District of Thunder Bay
Publication Number: R043 Page: 43 Date: 1997
Author: Milne V.G.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Nipigon-Schreiber, geological compilation series, Thunder Bay District
Publication Number: M2232 Scale: 1:253,440 Date: 1973
Author: Carter M.W., McIlwaine W.H., Wisbey P.A.
Publisher Name: Ontario Division of Mines
Location:
Book - RES.GEOL.MIN. DEP. FILES TB.
Publication Number: N/A Date: 1996
Author:
Publisher Name:
Location:
Map - Heron Bay area, District of Thunder Bay, Ontario
Publication Number: ARM40D Scale: 1:95,040 Date: 1997
Author: Thomson J.E.
Publisher Name: Ontario Dept. of Mines
Location:
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