ID | 42457 |
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Sort Key | 3
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Title Alternative | 西南日本の熱変成超苦鉄質岩体中のかんらん石と輝石の組成変化に関する覚書
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Abstract | This short article presents some diagrams showing the compositional variations of primary and metamorphic olivine, orthopyroxene and clinopyroxene in peridotites and serpentinites from thermally metamorphosed ultramafic complexes in SW Japan. In contrast to olivine, which shows a gradual change of chemical composition corresponding with metamorphic grade, orthopyroxene and clinopyroxene show clear differences in composition between primary and metamorphic phases. Compared with primary pyroxenes, even though their compositions could be variable depending on original rock composition, metamorphic orthopyroxene and
metamorphic clinopyroxene is clearly deficient in Cr(2)O(3) and CaO, and in Cr(2)O(3) and Al(2)O(3), respectively. These characteristics are useful for the discrimination between the pyroxenes of different origin.
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Keywords | chemical composition
olivine
orthopyroxene
clinopyroxene
metaperidotite
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Publication Title |
Okayama University Earth Science Report
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Published Date | 2010-12-24
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Volume | volume17
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Issue | issue1
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Publisher | 岡山大学理学部地球科学教室
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Publisher Alternative | Department of Earth Sciences, Faculty of Science, Okayama University
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Start Page | 1
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End Page | 5
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ISSN | 1340-7414
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NCID | AN10506284
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Content Type |
Departmental Bulletin Paper
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OAI-PMH Set |
岡山大学
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language |
English
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Copyright Holders | © 2010 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
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File Version | publisher
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Refereed |
False
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Eprints Journal Name | esr
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