Discovery of marine Upper Jurassic-Lower Cretaceous rocks
in Uttaradit Province: a new approach for paleoenvironment
and tectonic settings |
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| Authors: | T CHAROENTITIRAT J YINGYUEN A MEESOOK and P CHARUSIRI |
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| Institution: | Department of Geology, Faculty of Science, Chulalongkorn University, Bangkok 10330 Thailand;PTT Exploration and Production Public Company Limited, Bangkok 10900 Thailand;Department of Mineral Resources, Rama VI Road, Bangkok 10600 Thailand;Department of Geology, Faculty of Science, Chulalongkorn University, Bangkok 10330 Thailand |
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| Abstract: | The sedimentary rocks exposed in the study area, the Cham Bon reservoir and nearby area in Phichai District, Uttaradit Province, Thailand were grouped as non-marine Jurassic Phra Wihan Formation of the Khorat Group. After the previous reconnaissance by geologists of Department of Mineral Resources of Thailand, marine bivalves have been newly discovered in this area. This made us eagerly to examine the sedimentology, stratigraphy and geotectonic evolution of this region. The purpose of this research is to study in detail the sedimentary rocks in order to reconstruct the depositional environment. Two sections, the Cham Bon section and another section at 58 km-stone of Highway no.11, have been measured and 25 samples were petrographically examined. The Cham Bon sec-tion, which is 252 m thick, can be lithologically di-vided into 3 parts: the lower, middle and upper parts. The lower part is characterized by thick-bedded and massive quartz arenite. |
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| Keywords: | Marine bivalve Cham Bon Reservoir Uttaradit Thailand |
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