Chemical compositions of anorthite and its mother rock
作者
Fumio Sato,Yoshio Kagawa
出处
期刊:The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists [Japan Association of Mineralogical Sciences] 日期:1960-01-01卷期号:44 (5): 236-237
Large plagioclase and basic andesite containing it were chemically analyzed. Plagioclase proved to be anorthite of An93.4 composition. Its mother rock is not comparatively high in Al2O3 composition and it contains labradrite phenocrysts together with anorthite large crystals.