Research articles
ScienceAsia (): 350-360 |doi:
10.2306/scienceasia1513-1874...350
Petrochemical characteristics of Tak volcanic rocks,
Thailand: Implication for tectonic significance
Burapha Phajuy*, Vimoltip Singtuen
ABSTRACT: Tak volcanic rocks, found in the southern part of the Chiang Khong-Lampang-Tak volcanic belt in northern
Thailand, provide important evidence of the tectonic evolution of the Palaeotethys ocean. Petrographically and
geochemically, the volcanic rocks selected for this study are made up of rhyolite, rhyodacite, andesite porphyry, and
basalt. Based on field investigations, these rocks are also associated with other igneous rocks including granite,
granodiorite, tuff, gabbro, and cumulus gabbro. The chemical data acquired from X-ray fluorescence, inductively
coupled plasma atomic emission spectroscopy, and inductively coupled plasma mass spectrometry methods suggest
that the studied rocks from the eruption can be separated into eight magmatic groups and four tectonic settings.
The tectonic setting of the southern location of Chiang Khong-Lampang-Tak volcanic rocks consists of (1) an active
continental margin (Groups V and VII), (2) a back-arc basin (Group VI), (3) post-collision (Groups II and III), and
(4) continental rifting (Groups I, IV, and VIII).
Download PDF
311 Downloads 1572 Views
| a |
Department of Geological Sciences, Faculty of Science, Chiang Mai University, Chiang Mai 50200 Thailand |
* Corresponding author, E-mail: buraphaphj3@gmail.com
Received 3 Jul 2018, Accepted 6 Aug 2019
|
