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Melting and subsolidus reactions in the system K2O-CaO-Al2O3-SiO2-H2O: corrections and additional experimental data

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Abstract

Melting relationships in the system K2O-CaO-Al2O3-SiO2-H2O have been reinvestigated using Schreinemakers analysis and hydrothermal experiments. The reaction sanidine+muscovite+zoisite+quartz+vapor =melt has been bracketed at 10, 15, and 20 kbars and 670–680, 680–690, and 690–700° C, respectively and it marks the lowest solidus temperatures in the system investigated.

Below 10 kbars, experimental data on the beginning of melting in zoisite- or muscovite-bearing anorthite+sanidine assemblages have been obtained, which are not showing any differences and therefore point to melt compositions close to the feldspar-quartz join.

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  1. Institut für Kristallographie und Petrographie der Universität, Welfengarten 1, D-3000, Hannover 1, Federal Republic of Germany

    Manfred Schliestedt & Wilhelm Johannes

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  1. Manfred Schliestedt
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  2. Wilhelm Johannes
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Schliestedt, M., Johannes, W. Melting and subsolidus reactions in the system K2O-CaO-Al2O3-SiO2-H2O: corrections and additional experimental data. Contr. Mineral. and Petrol. 88, 403–405 (1984). https://doi.org/10.1007/BF00376764

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  • DOI: https://doi.org/10.1007/BF00376764

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