Channel Evolution in Southern Pattani Basin, Gulf of Thailand from Pliocene to Present Day
Article Sidebar
Main Article Content
Abstract
Channel evolution in southern Pattani Basin, Gulf of Thailand was systematically characterized across three stratigraphic intervals corresponding to the Pliocene (~5Ma), Pleistocene (~2Ma), and present-day seabed. These intervals were examined using Root-Mean-Square (RMS) amplitude, variance attribute, and morphometric analysis within Petrel 2017. A total of nine sub-units were identified and key parameters including sinuosity index (SI), channel width, channel belt width, orientation, and incision depth were measured from more than 35 channel segments. The results indicate that sea-level fluctuation was the primary control on channel development; Highstand conditions favored highly sinuous meandering channels with SI values reaching 2.24 with an average of 1.74 , whereas lowstand periods were characterized by straighter and more deeply incised channels with SI values approaching 1.00 with an average of 1.08. A progressive reduction in sinuosity through the Pleistocene succession records sustained base level fall associated with glacial interglacial cycles. Structural inheritance exerted a secondary influence with WSW directed drainage locally aligned with NW-SE fault systems inherited from Paleogene rifting. Reoccupation of older valleys by younger channels resulted in vertically stacked channels bodies, reflecting repeated channel reuse through time. These observations provide new insights into large Neogene-Quaternary channel evolution and sediment distribution within the Pattani Basin.
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright © 2008 Department of Geology, Faculty of Science, Chulalongkorn University. Parts of an article can be photocopied or reproduced without prior written permission from the author(s), but due acknowledgments should be stated or cited accordingly.
References
Abdelaziz, N., 2017. STRATIGRAPHIC TRAPS DELINEATION, SOUTHERN PATTANI BASIN, GULFOF THAILAND. Bulletin of Earth Sciences of Thailand, 9(2), pp.45-52.
Ahmad, M.N., Rowell, P. and Sriburee, S., 2014. Detection of fluvial sand systems using seismic attributes and continuous wavelet transform spectral decomposition: case study from the Gulf of Thailand. Marine Geophysical Research, 35(2), pp.105-123.
Bustin, R.M. and Chonchawalit, A., 1997. Formation and tectonic evolution of the Pattani Basin, Gulf of Thailand. Oceanographic Literature Review, 2(44), p.107.
Chenrai, P., Nugroho, M.O.B., Harishidayat, D. and Ma, P., Architecture and geomorphology of Middle to Late Miocene fluvial channel system in Songkhla Basin, Gulf of Thailand. Gulf of Thailand.
Harishidayat, D., Al-Dossary, S. and Al-Shuhail, A., 2024. Architecture and geomorphology of fluvial channel systems in the Arabian Basin. Scientific Reports, 14(1), p.25025.
Hossain, S., 2020. Application of seismic attribute analysis in fluvial seismic geomorphology. Journal of Petroleum Exploration and Production Technology, 10(3), pp.1009-1019.
Kornsawan, A. and Morley, C.K., 2002. The origin and evolution of complex transfer zones (graben shifts) in conjugate fault systems around the Funan Field, Pattani Basin, Gulf of Thailand. Journal of Structural Geology, 24(3), pp.435-449.
Niyomborwornwat, N., 2014. Seismic geomorphology of fluvial systems, Pattani Basin, Gulf of Thailand. Bulletin of Earth Sciences of Thailand, 7(1&2), pp.135-145.
Posamentier, H.W. and Kolla, V., 2003. Seismic geomorphology and stratigraphy of depositional elements in deep-water settings. Journal of sedimentary research, 73(3), pp.367-388.
Watcharanantakul, R. and Morley, C.K., 2000. Syn-rift and post-rift modelling of the Pattani Basin, Thailand: evidence for a ramp-flat detachment. Marine and Petroleum Geology, 17(8), pp.937-958.
