Belley, Philippe M.; Onodenalore, Ofure C.; Bleeker, Wouter (2024) Corundum in Sulfide Ore at the Thompson Mine, Manitoba, Canada: An Unusual Occurrence of Cr- and Ni-Bearing Corundum. The Canadian Journal of Mineralogy and Petrology, 62 (3). 479-488 doi:10.3749/2300017
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Corundum in Sulfide Ore at the Thompson Mine, Manitoba, Canada: An Unusual Occurrence of Cr- and Ni-Bearing Corundum | ||
| Journal | The Canadian Journal of Mineralogy and Petrology | ISSN | 1499-1276 |
| Authors | Belley, Philippe M. | Author | |
| Onodenalore, Ofure C. | Author | ||
| Bleeker, Wouter | Author | ||
| Year | 2024 (May 31) | Volume | 62 |
| Page(s) | 479-488 | Issue | 3 |
| Publisher | Mineralogical Association of Canada | ||
| URL | |||
| DOI | doi:10.3749/2300017Search in ResearchGate | ||
| Generate Citation Formats | |||
| Classification | Not set | LoC | Not set |
| Mindat Ref. ID | 18656369 | Long-form Identifier | mindat:1:5:18656369:0 |
| GUID | 0 | ||
| Full Reference | Belley, Philippe M.; Onodenalore, Ofure C.; Bleeker, Wouter (2024) Corundum in Sulfide Ore at the Thompson Mine, Manitoba, Canada: An Unusual Occurrence of Cr- and Ni-Bearing Corundum. The Canadian Journal of Mineralogy and Petrology, 62 (3). 479-488 doi:10.3749/2300017 | ||
| Plain Text | Belley, Philippe M.; Onodenalore, Ofure C.; Bleeker, Wouter (2024) Corundum in Sulfide Ore at the Thompson Mine, Manitoba, Canada: An Unusual Occurrence of Cr- and Ni-Bearing Corundum. The Canadian Journal of Mineralogy and Petrology, 62 (3). 479-488 doi:10.3749/2300017 | ||
| In | (2024, May) The Canadian Journal of Mineralogy and Petrology Vol. 62 (3). Mineralogical Association of Canada | ||
| Abstract/Notes | Abstract A novel type of corundum host environment is described from the Thompson Mine, northern Manitoba, where corundum occurs within a high-grade metamorphic reaction zone between boudinaged metaperidotite bodies, sulfide ore, and Al-rich pelitic schist of the Pipe Formation (Ospwagan Group). Zoned corundum porphyroblasts, up to 20 mm across, contain coevally formed sulfide inclusions, zircon, rutile, abundant exsolved rutile needles, and secondary sulfide inclusions formed within fractures. Retrograde alteration products of corundum include greenish muscovite (in contact with the schist) and diaspore (in contact with sulfides). The median concentrations of trace elements in Thompson corundum are as follows (in µg/g): 119 Mg, 1720 Ti, 69.9 V, 390 Cr, 8.2 Mn, 1924 Fe, 9.1 Ni, and 106 Ga. The geochemical signature of Thompson corundum (enrichment in Fe, Cr, and Ni) resembles that of ruby in other metamorphic and metasomatic mafic-ultramafic-hosted deposits, and the Cr concentration is comparable to the low range of rubies. Thompson corundum contains high Ni concentrations relative to most Cr-enriched corundum occurrences, a result of formation in an exceptionally Ni-rich environment. The high abundance of exsolved rutile inclusions imparts a dominantly brownish-gray color to the corundum, which precludes it from being of gem quality. Chromium-bearing corundum has been suggested as a possible indicator mineral for metamorphosed massive sulfide deposits, however, it is an indirect indicator that risks yielding false positives. Further investigation into Ni concentrations in corundum, a potential indicator of formation in a Ni-rich environment, is recommended. | ||
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