A simple predictive model of quartz solubility in water-salt-CO2 systems at temperatures up to 1000 °C and pressures up to 1000 MPa |
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| Authors: | Nikolay N Akinfiev |
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| Institution: | a Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry RAS, Staromonetnyi per. 35, Moscow 119017, Russia
b Rock-Water Interaction Group, Institute of Geological Sciences, University of Bern, Baltzerstrasse 3, Bern CH-3012, Switzerland |
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| Abstract: | Knowledge of the solubility of quartz over a broad spectrum of aqueous fluid compositions and T-P conditions is essential to our understanding of water-rock interaction in the Earth’s crust. We propose an equation to compute the molality of aqueous silica, mSiO2(aq), mol·(kg H2O)−1, in equilibrium with quartz and water-salt-CO2 fluids, as follows: |
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