Age, tectonic setting and regional implications of the Chiang Khong volcanic suite, northern Thailand
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. Th...
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th-cmuir.6653943832-50582014-08-30T02:56:06Z Age, tectonic setting and regional implications of the Chiang Khong volcanic suite, northern Thailand Barr S.M. MacDonald A.S. Ounchanum P. Hamilton M.A. 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. 2014-08-30T02:56:06Z 2014-08-30T02:56:06Z 2006 Article 00167649 10.1144/0016-76492005-118 http://www.scopus.com/inward/record.url?eid=2-s2.0-33750704635&partnerID=40&md5=016acd5ff9944f39f367ccd7c476a8b0 http://cmuir.cmu.ac.th/handle/6653943832/5058 English |
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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. |
| format |
Article |
| author |
Barr S.M. MacDonald A.S. Ounchanum P. Hamilton M.A. |
| spellingShingle |
Barr S.M. MacDonald A.S. Ounchanum P. Hamilton M.A. Age, tectonic setting and regional implications of the Chiang Khong volcanic suite, northern Thailand |
| author_facet |
Barr S.M. MacDonald A.S. Ounchanum P. Hamilton M.A. |
| author_sort |
Barr S.M. |
| title |
Age, tectonic setting and regional implications of the Chiang Khong volcanic suite, northern Thailand |
| title_short |
Age, tectonic setting and regional implications of the Chiang Khong volcanic suite, northern Thailand |
| title_full |
Age, tectonic setting and regional implications of the Chiang Khong volcanic suite, northern Thailand |
| title_fullStr |
Age, tectonic setting and regional implications of the Chiang Khong volcanic suite, northern Thailand |
| title_full_unstemmed |
Age, tectonic setting and regional implications of the Chiang Khong volcanic suite, northern Thailand |
| title_sort |
age, tectonic setting and regional implications of the chiang khong volcanic suite, northern thailand |
| publishDate |
2014 |
| url |
http://www.scopus.com/inward/record.url?eid=2-s2.0-33750704635&partnerID=40&md5=016acd5ff9944f39f367ccd7c476a8b0 http://cmuir.cmu.ac.th/handle/6653943832/5058 |
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1681420353744666624 |