Work

Missing ophiolitic rocks along the Mae Yuam Fault as the Gondwana–Tethys divide in north‐west Thailand

Year: 2004

Type: article

Abstract: 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.

Source: Island Arc

DOI: 10.1111/j.1440-1738.2003.00412.x

Authors: Ken‐ichiro Hisada, Masaaki Sugiyama, Katsumi Ueno, Punya Charusiri, Shoji Arai

Institutions: University of Tsukuba, Fukuoka University, Chulalongkorn University, Kanazawa University

Language: English

Topic: Geological and Geochemical Analysis

Subfield: Geophysics

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: bronze

Funders: Victoria University of Wellington, Victoria University

OpenAlex ID: W2139367484

FWCI: 1.082

Cites: 26

Cited by: 33

Related to: 10