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Age, tectonic setting and regional implications of the Chiang Khong volcanic suite, northern Thailand.
- Source :
-
Journal of the Geological Society . Nov2006, Vol. 163 Issue 6, p11-11. 1p. - Publication Year :
- 2006
-
Abstract
- The Chiang Khong volcanic suite forms the northeastern part of the Tak-Chiang Khong volcanic belt in the Sukhothai terrane of northern Thailand. It consists mainly of subaerial andesitic to rhyolitic tuffaceous rocks. A rhyolitic tuff yielded a Middle Triassic U-Pb (zircon) age of 232.9 ± 0.4 Ma. The suite displays calc-alkalic chemical trends and Nb, P, and Ti depletion characteristic of subduction-related magmatism. Based on petrological similarities, the suite is correlated with the c. 240 Ma Lampang volcanic rocks located farther to the SW in the Tak-Chiang Khong belt, and with volcanic rocks of similar age in the Lincang-Jinghong belt in Yunnan, in the western part of the Simao block. These correlations support the placement of the Palaeo-Tethyan suture to the west of the Sukhothai terrane. [ABSTRACT FROM AUTHOR]
- Subjects :
- *VOLCANIC ash, tuff, etc.
*ZIRCON
*MAGMATISM
Subjects
Details
- Language :
- English
- ISSN :
- 00167649
- Volume :
- 163
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Journal of the Geological Society
- Publication Type :
- Periodical
- Accession number :
- 22974108
- Full Text :
- https://doi.org/10.1144/0016-76492005-118