Electron microprobe dating of monazites from an ultrahigh-temperature granulite in Southern India: Implications for the timing of Gondwana assembly
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- SANTOSH M.
- Faculty of Science, Kochi University
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- YOKOYAMA Masataka
- Faculty of Science, Kochi University
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- TSUTSUMI Yukiyasu
- Department of Geology, National Science Museum
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- YOSHIKURA Shin-ichi
- Faculty of Science, Kochi University
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We report here monazite geochronology on a newly discovered high pressure (HP) and ultrahigh-temperature (UHT) granulite locality at Thoppur within the Palghat-Cauvery Shear Zone system in southern India. In situ dating of monazites associated with the UHT minerals using electron probe technique yielded PbO vs. ThO2* apparent isochron age of 544 ± 5 Ma. This is the first study from southern India where older monazite cores or complex age patterns are virtually absent, and all the monazite population in the studied samples crystallized/recrystallized during a single thermal maximum which we correlate with the timing of extreme crustal metamorphism during the final assembly of the Gondwana supercontinent.
収録刊行物
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- Journal of Mineralogical and Petrological Sciences
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Journal of Mineralogical and Petrological Sciences 103 (2), 77-87, 2008
一般社団法人 日本鉱物科学会
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詳細情報 詳細情報について
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- CRID
- 1390282681522453376
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- NII論文ID
- 10020736965
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- NII書誌ID
- AA11460926
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- ISSN
- 13493825
- 13456296
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- 使用不可