Evidence from correlated Ir/Os and Cu/S for late-stage mobility in peridotite xenoliths: Implications for Re-Os systematics
Handler, Michael; Bennett, Victoria; Dreibus, Gerlind
Combined Ir, Os, Cu, and S concentrations from 18 eastern Australian peridotite xenoliths demonstrate systematic variations in Os concentrations with S loss and require a late-stage process capable of fractionating Os from the geochemically similar Ir. This effect accounts for the greater variability and lower mean Os concentrations observed in peridotite xenoliths as compared with massif peridotites and abyssal peridotites. Late-stage mobility of Os in xenoliths has important implications for...[Show more]
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