| Reference Type | Journal (article/letter/editorial) |
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| Title | Geology of the Ore Fault Ni-Cu Deposit, Bird River Sill Complex, Manitoba |
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| Journal | Exploration and Mining Geology |
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| Authors | Good, D. | Author |
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| Mealin, C. | Author |
| Walford, P. | Author |
| Year | 2009 (January 1) | Volume | 18 |
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| Page(s) | 41-57 | Issue | 1 |
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| Publisher | GeoScienceWorld |
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| DOI | doi:10.2113/gsemg.18.1-4.41Search in ResearchGate |
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| Generate Citation Formats |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 7697310 | Long-form Identifier | mindat:1:5:7697310:3 |
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| GUID | 0 |
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| Full Reference | Good, D., Mealin, C., Walford, P. (2009) Geology of the Ore Fault Ni-Cu Deposit, Bird River Sill Complex, Manitoba. Exploration and Mining Geology, 18 (1). 41-57 doi:10.2113/gsemg.18.1-4.41 |
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| Plain Text | Good, D., Mealin, C., Walford, P. (2009) Geology of the Ore Fault Ni-Cu Deposit, Bird River Sill Complex, Manitoba. Exploration and Mining Geology, 18 (1). 41-57 doi:10.2113/gsemg.18.1-4.41 |
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| In | (2009, January) Exploration and Mining Geology Vol. 18 (1) GeoScienceWorld |
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| Abstract/Notes | The geology of the Ore Fault Ni-Cu deposit has been reinterpreted in the light of recent studies of the geology of the Neoarchean Bird River Sill Complex and the occurrence of economic Ni-Cu and Zn-Cu-Ag mineralization. The Ni-Cu sulfides are hosted by the lower of two parallel NNW-trending and moderately W-dipping mafic–ultramafic intrusions related to the Bird River Sill Complex. The bodies intruded a bimodal volcanic suite consisting of weakly deformed mafic flows and felsic pyroclastic rocks. The mafic volcanic rocks are geochemically related to the MORB-type rocks of the Lamprey Falls Formation, and the felsic volcanic rocks are related to arc-type rocks of the Peterson Creek Formation. The original pyroxene- and olivine-dominated mineralogy of the sills has been replaced by variable serpentine-amphibole-talc-carbonate assemblages.
The Ni-Cu sulfide assemblage exhibits textures and geochemical signatures typical of orthomagmatic sulfide mineralization. The sulfide minerals are associated with cumulate layers of magnetic ferrochromite that range in thickness from a few to tens of centimeters. A later event of Zn-Cu-Ag sulfide mineralization associated with quartz veining and garnet-chlorite alteration along a fault that strikes north, dips vertically, and cuts all rock types. The mineralized fault is cut by the NE-trending Peterson Creek shear zone. Where the Ni-Cu and Zn-Cu-Ag mineralized zones intersect, remnant magmatic features such as amphibolite or cumulate ferrochromite bands occur within quartz veins or local chlorite alteration. The mixed zones contain a very unusual polymetallic assemblage of Ni, Cu, Zn, Ag, and platinum group elements (PGE). |
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