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Divergent T-fO2 paths during crystallisation of H2O-rich and H2O-poor magmas as recorded by Ce and U in zircon, with implications for TitaniQ and TitaniZ geothermometry

Loucks, Robert; Fiorentini, Marco; Rohrlach, Bruce


During solidification of magma chambers as systems closed to chemical exchange with environs, the residual siliceous melt may follow a trend of rising, constant, or decreasing oxidation state, relative to reference buffers such as nickel + nickel oxide (NNO) or fayalite + magnetite + quartz. Titanomagnetite–hemoilmenite thermometry and oxybarometry on quenched volcanic suites yield temperature versus oxygen fugacity arrays of varied positive and negative slopes, the validity of which has been...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
Source: Contributions to Mineralogy and Petrology
DOI: 10.1007/s00410-018-1529-3
Access Rights: Open Access


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