Comments on oxygen isotope geothermometry

Details Comments on oxygen isotope geothermometry Comments on oxygen isotope geothermometry

Oct 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973e%26psl..20..250b&link_type=abstract

Earth and Planetary Science Letters, Volume 20, Issue 2, p. 250-265.

Physics

58

Scientific paper

We discuss the temperature dependence of the fractionation factor α, for oxygen isotopic exchange between silicates, magnetite and water from a theoretical point of view. It is shown that for anhydrous silicates and magnetite 1000 ln α (mineral water) = -3.7 + B/T2, where B is a constant, for the temperature interval 500° to 800°C. Using the results of laboratory experiments and natural observed fractionations, we have derived isotopic fractionation equations for quartz, feldspar, muscovite and magnetite-water systems, which in certain cases are considerably different from already published equations.

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