UHT granulites from Highland Complex, Sri Lanka I: Geological and petrological background

• OSANAI Yasuhito

  Division of Earth Sciences, Faculty of Social and Cultural Studies, Kyushu University

• SAJEEV Krishnan

  Centre for Earth Sciences, Indian Institute of Science

• NAKANO Nobuhiko

  Division of Earth Sciences, Faculty of Social and Cultural Studies, Kyushu University

• KITANO Ippei

  Graduate School of Integrated Sciences for Global Society, Kyushu University

• KEHELPANNALA Wilbert K.V.

  Department of Geology, University of Botswana

• KATO Ryosuke

  Graduate School of Integrated Sciences for Global Society, Kyushu University

• ADACHI Tatsuro

  Division of Earth Sciences, Faculty of Social and Cultural Studies, Kyushu University

• MALAVIARACHCHI Sanjeewa P.K.

  Department of Geology, Faculty of Science, University of Peradeniya

書誌事項

タイトル別名

• UHT granulites of the Highland Complex, Sri Lanka I: Geological and petrological background

抄録

The ultrahigh–temperature (UHT) regional metamorphism of Sri Lanka has a significant role in understanding the tectonics and formation of the Gondwana supercontinent. Sri Lanka is specifically important because of its central position in Gondwana, located between southern India, Madagascar and eastern Antarctica. In particular, the Highland Complex has been the focus of several previous studies because of the prominence of metasedimentary rocks that experienced UHT metamorphism. The central Highland Complex of Sri Lanka consists of Spr–bearing Mg–Al rich granulites intercalated with other pelitic, mafic granulites and calc–silicates, which preserve several textural evidences for UHT metamorphism. The calculated peak metamorphic conditions for the Mg–Al rich granulite yielded a temperature range from 910 to 1005 °C at 1.0 GPa, and the pressure varies between 0.9 to 1.2 GPa. The estimated metamorphic P–T conditions and evolution path is in good agreement with previous studies and also to that of similar rock–types from southern Madagascar, southern India and East Antarctica.

収録刊行物

• Journal of Mineralogical and Petrological Sciences

  Journal of Mineralogical and Petrological Sciences 111 (3), 145-156, 2016

  一般社団法人　日本鉱物科学会

キーワード

• UHT metamorphism
• Mg–Al rich granulites
• Gondwana super–continent
• <i>P–T</i> path

詳細情報

• CRID: 1390282681522431616
• NII論文ID: 130005165646
• DOI: 10.2465/jmps.151227
• ISSN: 13493825
• ISSN: 13456296
• Web Site: https://www.jstage.jst.go.jp/article/jmps/111/3/111_151227/_pdf
• 本文言語コード: en
• データソース種別:
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