Other
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991gecoa..55.2709c&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 55, Issue 10, pp.2709-2727
Other
1
Scientific paper
The theoretical compositions of an aqueous solution in equilibrium with a mineral assemblage made up of low-albite, K-feldspar, either a Ca-Al-silicate or calcite, clinochlore, muscovite, quartz, anhydrite, and fluorite, under varying T-P CO 2 -m cl conditions of geothermal interest, indicate that 1. 1) the total SO 4 content as well as the Na / K , K 2 / Mg , and SO 4 / F 2 ratios are potential geothermometers; 2. 2) the total HCO 3 content as well as the K 2 / Ca , Ca / Mg , HCO 3 / F , and ( HCO 3 ) 2 / SO 4 ratios are potential P CO 2 indicators; 3. 3) the Na, K, Ca, and Mg total contents as well as the Na 2 / Mg and Na 2 / Ca ratios are mainly controlled by the total ionic salinity and are therefore hardly suitable as geoindicators. A preliminary test of the equations involving total HCO 3 content as well as K 2 / Ca and HCO 3 / F ratios as P CO 2 indicators have provided satisfactory results.
Chiodini Giovanni
Cioni Roberto
Guidi Massimo
Marini Luigi
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