Age, tectonic setting and regional implications of the Chiang Khong volcanic suite, northern Thailand

被引：63

作者：

Barr, Sandra M. ^{[1
]}

MacDonald, Alan S.

Ounchanum, Prayote

Hamilton, Michael A.

机构：

[1] Acadia Univ, Dept Geol, Wolfville, NS B4P 2R6, Canada

[2] Chiang Mai Univ, Dept Geol Sci, Chiang Mai 50200, Thailand

[3] Univ Toronto, Jack Satterly Geochron Lab, Toronto, ON M5S 3B1, Canada

来源：

JOURNAL OF THE GEOLOGICAL SOCIETY | 2006年 / 163卷

关键词：

D O I：

10.1144/0016-76492005-118

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

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.

引用

页码：1037 / 1046

页数：10

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