The effect of fluid pressure on oxygen isotope exchange between feldspar and water

Details The effect of fluid pressure on oxygen isotope exchange between feldspar and water The effect of fluid pressure on oxygen isotope exchange between feldspar and water

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978gecoa..42..235y&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 42, Issue 3, pp.235-239

Physics

12

Scientific paper

The rate of oxygen isotope exchange between adularia and 2 M KCl solution has been measured at 650°C at pressures from 125 to 4000 bar. Isotropie diffusion coefficients calculated from these data show a positive dependence on the fluid pressure. This dependence is opposite to the predicted effect of hydrostatic pressure and is attributed to the activity of `water' (H 2 O, H + or OH - ) in the feldspar.

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