JaLCDOI 10.18926/21108
Title Alternative Relict igneous minerals of the Sangun metamorphic rocks of the Tsuboi district, Okayama Prefecture
FullText URL pitsr_054_043_053.pdf
Author Li, Qing-Yi| Shibata, Tsugio| Mitsuno, Chiharu|
Abstract 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.
Publication Title 岡山大学温泉研究所報告
Published Date 1984-03-25
Volume volume54
Start Page 43
End Page 53
ISSN 0369-7142
language 日本語
File Version publisher
NAID 120002311021