"Geothermal mineral equilibria". Reply to a comment by M. A. Grant

Details "Geothermal mineral equilibria". Reply to a comment by M. A. Grant "Geothermal mineral equilibria". Reply to a comment by M. A. Grant

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gecoa..46.2681g&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 46, Issue 12, pp.2681-2683

Computer Science

Scientific paper

The dominant process limiting CO 2 -contents of fluids in high temperature (>240°), liquid-dominated systems consists of the conversion of primary plagioclase by CO 2 to calcite and clay according to log P CO 2 = 15.26 - 7850/( t + 273.2), temperature t in °C, with a likely error in log P CO 2 due to variations in the activities of the anorthite and kaolinite components of the mineral phases involved of around ± 1 log unit. Secondary processes such as adiabatic expansion, conductive cooling and mixing with cooler groundwaters are largely responsible for subsequent variations in P CO 2 at lower temperatures (>240°).

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