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Volcanic Facies of the Doi Phra Baht Volcanic Deposits, Mueang District, Lampang Province, Thailand |
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| รหัสดีโอไอ | |
| Creator | Udomporn Wipakul |
| Title | Volcanic Facies of the Doi Phra Baht Volcanic Deposits, Mueang District, Lampang Province, Thailand |
| Contributor | Chutchai Tiangtham, Boontarika Srithai, Yuenyong Panjasawatwong |
| Publisher | Department of Geology, Chulalongkorn University |
| Publication Year | 2555 |
| Journal Title | Bulletin of Earth Sciences of Thailand (BEST) |
| Journal Vol. | 5 |
| Journal No. | 1 |
| Page no. | 9-Jan |
| Keyword | Volcanic facies, Ignimbrite, Volcaniclastic rocks, Doi Phra Bath, Lampang, Chiang Khong Tak Volcanic Belt |
| URL Website | https://www.bestjournal.org/ |
| Website title | Bulletin of Earth Sciences of Thailand |
| ISSN | 1906-280X |
| Abstract | In Thailand, the Pre-Jurassic Chiang Khong Tak volcanic belt has been renowned for the most voluminous igneous rocks and various magmatic suites, where rhyolite rhyodacite and their pyroclastic equivalents are predominant. A sequence of volcanic rocks exposed at Km marks 8-10 on Highway number 11 (LampangDenchai), Mueang District, Lampang Province offers a remarkable section for facies analysis and thus leads to the understanding of clast forming, transportation, and deposition processes. From field observation and petrographic study, the rocks can be classified as pyroclastic facies and volcaniclastic/volcanogenic sedimentary facies. The pyroclastic facies is a mass flow deposit that includes welded and non-welded ignimbrite in part. It was interpreted to be products of subaerial eruption of silicic magma and deposited onshore or a shallow water environment. The volcaniclastic/volcanogenic sedimentary facies is characterized by well-bedded volcanic mudstone and volcanic sandstone, with laminae to thin-beds of black mudstone/claystone that contain sedimentary structures, such as load casts and flame structures. Subaqueous depositional environment with influence of turbidity current is proposed for transportation and deposition of this facies. |
