Revised Thermobarometry of Alpe Arami and other Garnet Peridotites from the Central Alps
2001
sensitivity of garnet–olivine chemical exchanges to temperature variThe four, currently best constrained, independent thermobarometers ations, and unreliability of garnet–orthopyroxene thermometry at lowfor garnet peridotites, namely Taylor’s (Neues Jahrbuch fur temperature conditions may account for the observed inconsistencies. A Mineralogie, Abhandlungen 172, 381–408, 1998) pyroxene discrepancy between thermobarometric data for the garnet lherzolites solvus and Krogh’s (Contributions to Mineralogy and Petand the associated eclogites is non-existent in our example, and in rology 99, 44–48, 1988) clinopyroxene–garnet Fe–Mg exchange other localities it may also be a thermobarometric artefact. thermometers, and Taylor’s (1998) Al-in-orthopyroxene and Nimis & Taylor’s (Contributions to Mineralogy and Petrology, 139, 541–544, 2000) Cr-in-clinopyroxene barometers, have been applied to garnet lherzolites from the Central Alps. Analyses from
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