Calcite dissolution kinetics in Na-Ca-Mg-Cl brines |
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| Authors: | Dwight K Gledhill John W Morse |
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| Institution: | Department of Oceanography, Texas A&M University, MS 3146, College Station, TX 77843, USA |
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| Abstract: | Sedimentary basins can contain close to 20% by volume of pore fluids commonly classified as brines. These fluids can become undersaturated with respect to calcite as a result of migration, dispersive mixing, or anthropogenic injection of CO2. This study measured calcite dissolution rates in geologically relevant Na-Ca-Mg-Cl synthetic brines (50-200 g L−1 TDS). The dissolution rate dependency on brine composition, pCO2 (0.1-1 bar), and temperature (25.0-82.5 °C) was modeled using the empirical rate equation R=k(1-Ω)n |
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