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タイトル: Missing ophiolitic rocks along the Mae Yuam Fault as the Gondwana-Tethys divide in north-west Thailand
著者: Hisada, Ken-ichiro
Sugiyama, Masaaki
Ueno, Katsumi
Charusiri, Punya
Arai, Shoji link image link image
荒井, 章司
発行日: 2004年 3月
出版社(者): Blackwell Publishing
雑誌名: Island Arc
ISSN: 1038-4871
巻: 13
号: 1
開始ページ: 119
終了ページ: 127
キーワード: Detrital chromian spinel
Mafic rock
Suture zone
Ultramafic rock
抄録: Thailand comprises two continental blocks: Sibumasu and Indochina. The clastic rocks of the Triassic Mae Sariang Group are distributed in the Mae Hong Son-Mae Sariang area, north-west Thailand, which corresponds to the central part of Sibumasu. The clastic rocks yield abundant detrital chromian spinels, indicating a source of ultramafic/mafic rocks. The chemistry of the detrital chromian spinels suggests that they were derived from three different rock types: ocean-floor peridotite, chromitite and intraplate basalt, and that ophiolitic rocks were exposed in the area, where there are no outcrops of them at present. Exposition of an ophiolitic complex denotes a suture zone or other tectonic boundary. The discovery of chromian spinels suggests that the Gondwana-Tethys divide is located along the Mae Yuam Fault zone. Both paleontological and tectonic aspects support this conclusion. © 2004 Blackwell Publishing Asia Pty Ltd.
DOI: 10.1111/j.1440-1738.2003.00412.x
URI: http://hdl.handle.net/2297/19550
資料種別: Journal Article
版表示: publisher

このアイテムを引用あるいはリンクする場合は次の識別子を使用してください。 http://hdl.handle.net/2297/19550



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