Lead isotope study of the late Archean Lac des Iles palladium deposit, Canada: enrichment of platinum group elements by ponded sulfide melt

Lead isotope study of the late Archean Lac des Iles palladium deposit, Canada: enrichment of platinum group elements by ponded sulfide melt

Lead isotopic compositions of mineral separates are presented from the mineralized zones (Roby, Twilight, and High Grade zones) of the Lac des Iles palladium deposit (approximately 2.69 Ga) and tonalitic country rocks (approximately 2.727 to 2.775 Ga) in the Wabigoon subprovince of the western Super...

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Veröffentlicht in:Mineralium deposita 2007-08, Vol.42 (6), p.601-611
Hauptverfasser: Hinchey, John G., Hattori, Kéiko H.
Format: Artikel
Sprache:eng
Schlagworte:
Isotope studies
Isotopes
Magma
Mineralogy
Palladium
Platinum
Ponding
Rocks
Sulfides
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Zusammenfassung:Lead isotopic compositions of mineral separates are presented from the mineralized zones (Roby, Twilight, and High Grade zones) of the Lac des Iles palladium deposit (approximately 2.69 Ga) and tonalitic country rocks (approximately 2.727 to 2.775 Ga) in the Wabigoon subprovince of the western Superior Province of Canada. Plagioclase separates show Pb isotope ratios similar to those of the late Archean depleted mantle. Sulfide minerals coexisting with plagioclase have a more radiogenic Pb isotope composition, but very low concentrations of U (
ISSN:0026-4598
1432-1866
DOI:10.1007/s00126-007-0129-3