Discovery of Shimanto High-P/T Metamorphic Rocks from the Western Margin of Kyushu, Japan
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- KOUCHI Yoshikazu
- Faculty of Science, University of Toyama
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- ORIHASHI Yuji
- Earthquake Research Institute, University of Tokyo
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- OBARA Hokuto
- Faculty of Science, University of Toyama
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- MIYATA Kazunori
- Fukui Prefectural Dinosaur Museum
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- SHIMOJO Masanori
- Graduate School of Science and Engineering, University of Toyama
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- OTOH Shigeru
- Graduate School of Science and Engineering, University of Toyama
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- AOYAMA Masashi
- Japan Geocommunications Co. Ltd.
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- AKAHORI Yoshimitsu
- Japan Geocommunications Co. Ltd.
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- YANAI Shuichi
- Japan Geocommunications Co. Ltd.
Bibliographic Information
- Other Title
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- 九州西端部からの四万十高圧変成岩類の発見
- キュウシュウ セイタンブ カラ ノ シマント コウアツ ヘンセイガンルイ ノ ハッケン
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Abstract
206Pb/238U dating of detrital zircons by LA-ICP-MS clarified that the majority of high-P/T Nagasaki metamorphic rocks in western Kyushu contain Late Cretaceous igneous zircon of 89 ± 3 Ma (Turonian-Coniacian) and 86 ± 2 Ma (Coniacian-Santonian). These data indicate that Nagasaki metamorphic rocks are composed mainly of Upper Cretaceous Shimanto metamorphic rocks, i.e. high-P/T metamorphosed accretionary complex of the Cretaceous Shimanto belt. This find strongly supports the subhorizontal geotectonic structure of the Japanese Islands previously inferred from surface geological mapping and deep seismic images.
Journal
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- Journal of Geography (Chigaku Zasshi)
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Journal of Geography (Chigaku Zasshi) 120 (1), 30-39, 2011
Tokyo Geographical Society
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Details 詳細情報について
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- CRID
- 1390282679206271616
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- NII Article ID
- 10030371695
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- NII Book ID
- AN00322536
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- ISSN
- 18840884
- 0022135X
- http://id.crossref.org/issn/00221341
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- NDL BIB ID
- 11043926
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed
