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

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

doi:10.2183/pjab.71.139

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

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

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	139-144
Number of pages	6
Journal	Proceedings of the Japan Academy Series B: Physical and Biological Sciences
Volume	71
Issue number	5
DOIs	https://doi.org/10.2183/pjab.71.139
Publication status	Published - Jan 1 1995
Externally published	Yes

All Science Journal Classification (ASJC) codes

Agricultural and Biological Sciences(all)
Physics and Astronomy(all)

Access to Document

10.2183/pjab.71.139

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AU - Kagami, Hiroo

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AU - Osanai, Yasuhito

AU - Shiraishi, Kazuyuki

AU - Hiroi, Yoshikuni

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