Rb-Sr and Sm-Nd Ages from the Highland Complex of Sri Lanka

Hiroo Kagami, Masaaki Owada, Yasuhito Osanai, Kazuyuki Shiraishi, Yoshikuni Hiroi

研究成果: Contribution to journalArticle査読

2 被引用数 (Scopus)

抄録

Metaigneous rocks from Gampola and Nuwara Eliya belong to the Highland Complex of Sri Lanka. Rb-Sr and Sm-Nd age data and initial Sr and Nd isotopic ratios document several geological events. (1) Separation of crustal material began in the late Archean. (2) Partial melting of crust took place on a large scale at ca. 2400 Ma, leaving metaigneous rocks as restite after extraction of felsic magmas. (3) High-grade metamorphism related to the Pan-African orogeny occurred at 520 Ma. (4) Partial melting of crustal material proceeded on a local scale at 490 Ma-480 Ma, producing slight disturbance to the Rb-Sr whole-rock system.

本文言語英語
ページ(範囲)139-144
ページ数6
ジャーナルProceedings of the Japan Academy Series B: Physical and Biological Sciences
71
5
DOI
出版ステータス出版済み - 1995
外部発表はい

All Science Journal Classification (ASJC) codes

  • 農業および生物科学(全般)
  • 物理学および天文学(全般)

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