Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/146016
Title: Active deformation of the Central Myanmar Forearc Basin : insight from post-Pleistocene inversion of the Pyay Fault
Authors: Aung, Lin Thu
Oo, Kyaw Zin
Win, Kyaw Myo
Moore, Gregory F.
Tun, Soe Thura
Naing, Win
Keywords: Social sciences::Geography
Issue Date: 2020
Source: Aung, L. T., Oo, K. Z., Win, K. M., Moore, G. F., Tun, S. T., & Naing, W. (2020). Active deformation of the Central Myanmar Forearc Basin : insight from post-Pleistocene inversion of the Pyay Fault. Journal of Asian Earth Sciences: X, 4, 100037-. doi:10.1016/j.jaesx.2020.100037
Journal: Journal of Asian Earth Sciences: X 
Abstract: Pyay sub-basin is located in the southern part of the Central Myanmar Forearc Basin, an elongate belt of en-echelon folds and thrust faults formed as a result of the hyper-oblique convergence of the India and Asia plates. Limited neotectonic studies suggest that the Pyay Fault is a major Pliocene inverted structure that trapped the hydrocarbons in Pyay sub-basin, where only sparse field-based observations are available to address the nature of very recent neotectonic processes. This study focuses on structural deformation related to active inversion of the Pyay Fault using field-based geological observations and interpretations of industrial seismic data. We map the ∼105 km long Pyay Fault, an east- dipping high-angle reverse fault with a significant dextral strike-slip component. The fault underlies the western limb of the major NNW-SSE- striking anticlinal ridge that forms the western margin of Pyay sub- basin. Growth strata within the Pliocene-Pleistocene Irrawaddy Formation, imaged in the shallow part (<1 km) of 2D seismic profiles, reflects the deposition of Pliocene-Pleistocene sediments synchronously with the inversion of the underlying Pyay Fault. In addition, uplifted fluvial terraces of the Ayeyarwady River on the hanging wall of Pyay Fault reflect the post-Pleistocene inversion of the Pyay sub-basin. This study suggests that the Pyay Fault is a prime example of active deformation of the Central Myanmar Forearc Basin which plays an important role in the basin evolution and an earthquake source potential of the Myanmar territory.
URI: https://hdl.handle.net/10356/146016
ISSN: 2590-0560
DOI: 10.1016/j.jaesx.2020.100037
Research Centres: Earth Observatory of Singapore 
Rights: © 2020 Earth Observatory of Singapore, Nanyang Technological University. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EOS Journal Articles

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