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Stability of the assemblage orthopyroxene-sillimanite-quartz in the system MgO-FeO-Fe2O3-Al2O3-SiO2-H2O

✍ Scribed by H. Annersten; F. Seifert

Publisher
Springer
Year
1981
Tongue
English
Weight
823 KB
Volume
77
Category
Article
ISSN
0010-7999

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Stability of almandine in the system FeO
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Almandine, although decomposing in the presence of metallic iron into the anhydrous subsolidus assemblage fayalite + ferrocordierite + hereynite solid solution at low pressures, melts incongruently to hercynitess -~ quartz + liquid at 10 kb. At pressures between about 12 and 20 kb the products of in