Summary
A chemical method based on differential attack enables a complete major element analysis of calcite coexisting with other carbonates to be performed. The temperature deduced from the chemically-determined Mg-content of calcite is usually lower than that derived from X-ray method; this is explained by the influence of other ions, e.g.Fe2+ and Mn2+, on the calcite lattice. The limitations of the use of the MgCO3 solid solution in calcite as a geothermometer are pointed out.
Eine chemische Methode, die auf der unterschiedlichen Angreifbarkeit beruht, erlaubt die vollständige Analyse auf häufigere Elemente von Calciten, die zusammen mit anderen Carbonaten vorkommen. Die Temperatur, die man aus dem chemisch bestimmten Mg-Gehalt der Calcite ableitet, ist in der Regel kleiner als die nach Röntgenmethoden bestimmte; das with durch den Einfluß anderer Ionen, z. B. Fe2+ und Mn2+, auf die Calcite-Struktur erklärt. Die Grenzen der Benützung der festen Lösung von MgCO3 in Calcit als Geothermometer werden aufgezeigt.
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Capedri, S., Rivalenti, G. A chemical method for major element determination in calcite coexisting with other carbonates and its bearing on geothermometry. TMPM Tschermaks Petr. Mitt. 21, 61–69 (1974). https://doi.org/10.1007/BF01081258
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DOI: https://doi.org/10.1007/BF01081258