Surface effect on the isotopic fractionation between CO2 and some carbonate minerals |
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| Authors: | MS Hamza |
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| Institution: | 1. California Institute of Technology, Pasadena, Calif. 91109 U.S.A.;2. Lamont-Doherty Geological Observatory of Columbia University, Palisades, N.Y. 10964, U.S.A. |
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| Abstract: | The surface effect on the isotopic fractionation between CO2 and calcite, dolomite and witherite has been studied through gas-solid exchange experiments. Oxygen isotope fractionation between surface calcite and CO2 was found to be higher by 5–6%. than the fractionation between bulk calcite and CO2.Similar studies were made using dolomite and witherite. The dolomite-calcite and witheritecalcite fractionation evaluated through the surface exchange with CO2 were found to be close to values determined by other workers under controlled conditions in the laboratory. |
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