Uthai Thani is a fascinating city in central Thailand and has the uniqueness of geodiversity, nature, culture, and history, which makes it ideal for geotourism development. The lifestyle of the local population is linked to nature and the river, making the area very interesting for tourist. It also has a fantastic mountainous region in the western part including karst topography, granite batholith, and numerous small hills. The study area consists of seven geosites, which are Sakae Krang River, Kao Pla Ra Mountain, Hup Pa Tat Cave, Samor Thong Hot Spring, Khuan Khun Kaew Reservoir, Saiber Waterfall, and Huai Kha Khaeng Wildlife Sanctuary. The Kao Pla Ra mountain is the highlight of this region, which has many prehistoric cliff-paintings. This geotourism announcement can educate the tourists to understand the geologic processes and has many advantages for the local and national sustainable development in the travel industry, economy, geology, history, and society.
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).
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