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Multiple stages of phengite formation in Sanbagawa schists |
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| Authors: | M Radvanec S Banno K Okamoto |
| Institution: | (1) Geological Survey of Slovakia, Spisska, Nova Ves, Slovakia;(2) Department of Geology and Mineralogy, Kyoto University, 606 Kyoto, Japan;(3) Department of Earth Sciences, Osaka Prefectural University, 691 Sakai, Japan |
| Abstract: | Summary Basic and pelitic schists of the garnet and biotite zones in the Sanbagawa belt in Shikoku, Japan, commonly contain phengite developed at different stages of metamorphism. Textures of the phengite and associated minerals show that Al-rich phengite is a prograde product and Al-poor phengite is a retrograde product.Mehrfache Stadien der Phengit-Bildung in den Sanbagawa-Schiefern Zusammenfassung Basische und pelitische Schiefer der Granat- und Biotitzonen im Sanbagawa Gürtel in Shikoku, Japan, führen Phengite, die während verschiedener Stadien der Metamorphose entstanden sind. Texturen der Phengite und assoziierter Minerale zeigen, daß Al-reicher Phengit das Produkt prograder Metamorphose ist, während Al-armer Phengit auf retrograde Metamorphose zurückgeht. With 5 Figures On leave from the Geological Survey of Slovakia, Spissa, Spisska, Nova Ves, Slovakia |
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