The reaction chlorite+dolomite=spinel+forsterite+calcite+carbon dioxide+water |
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| Authors: | E Torbjörn Widmark |
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| Institution: | (1) Department of Mineralogy and Petrology, University of Lund, Sölvegatan 13, S-223 65 Lund, Sweden |
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| Abstract: | The reaction chlorite+dolomite=spinel+ forsterite+calcite+CO2+H2O has been studied with hydrothermal equipment technique in a C-O-H fluid at P
fluid=1,000, 2,000 and 3,000 bars and fo2 controlled by NB or QFM buffer. The equilibrium conditions for the reaction has been determined as log K=–57,119/T+95.77+0.9860(P-1)/T(bar,°K). The mineral mixtures had an excess of dolomite. The composition of the chlorite among the reaction products has been analysed and found to have a higher Al/Si ratio than clinochlore. |
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