Oxygen isotope fractionations involving diopside, forsterite, magnetite, and calcite: Application to geothermometry

Details Oxygen isotope fractionations involving diopside, forsterite, magnetite, and calcite: Application to geothermometry Oxygen isotope fractionations involving diopside, forsterite, magnetite, and calcite: Application to geothermometry

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989gecoa..53.2985c&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 53, Issue 11, pp.2985-2995

Physics

66

Scientific paper

Oxygen isotope fractionations between diopside, forsterite, magnetite, and calcite have been studied experimentally at high pressures ( P = 15-16 kbar) and temperatures ( T = 600-1300° C ) with the carbonate-exchange technique of et al. (1989). The fractionations determined for these minerals can be combined with the data of et al. (1989) to give an internally consistent set of mineralmineral fractionations of the form 1000 ln = A × 10 6 T -2 , where the coefficient A is given in the following table: 7. The diopside-calcite and forsterite-calcite fractionations of the present study are in excellent agreement with the theoretically-derived fractionations of

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