JaLCDOI 10.18926/21108
タイトル(別表記) Relict igneous minerals of the Sangun metamorphic rocks of the Tsuboi district, Okayama Prefecture
フルテキストURL pitsr_054_043_053.pdf
著者 李 青一| 柴田 次夫| 光野 千春|
抄録 The Sangun metamorphic rocks of the Maniwa Group are well developed in the Tsuboi district, Okayama Prefecture. These metamorphic rocks consist mainly of psammitic and pelitic sedimentary rocks and lavas and pyroclastics of basic to acidic compositions that recrystallized during the Sangun low-grade regional metamorphism. The metamorphic rocks in this district underwent to a considerable extent a mineralogical and textural transformation, but still preserve in parts their original, mineralogical and textural features. Unaltered, relict clinopyroxenes and hornblendes are commonly observed in the metamorphic rocks derived from basic lavas and intermediate pyroclastics. Microprobe analyses of these relict minerals suggest that their host rocks were probably derivatives of magma(s) with a non-alkaline affinity.
出版物タイトル 岡山大学温泉研究所報告
発行日 1984-03-25
54巻
開始ページ 43
終了ページ 53
ISSN 0369-7142
言語 Japanese
論文のバージョン publisher
NAID 120002311021