Structural Characteristics and Evolution of Rakhine Basin, Bay of Bengal
详细信息
- 责任者：Wang Xuefeng (Hangzhou Research Institute of Geology ; PetroChina ; Hangzhou 310023 ; China) ; Lü Fuliang
- 刊名：Journal of Chengdu University of Technology
- 出版年：2013
- 卷期：40(4)
- 关键词：盆地演化 ; basin evolution ; 孟加拉湾 ; Bengal Bay
- 页码：p.424-430
- 图表：6 illus., 19 refs.
- 分类号：0300
- issnNo：ISSN1671-9727
- isbnNo：CN51-1634/N
摘要
This paper analyzes the structural characteristics and tectonic evolution of Rakhine Basin based on 2D seismic data and well data.The basin is located at accretionary wedge with a trench setting of active continental margin and has experienced the embryonic stage(Late Cretaceous-Paleocene),collision stage(Eocene-Oligocene) and quick collision stage(Miocene-Pliocene).Rakhine Basin can be subdivided into the submarine plain in the west and the Rakhine fold belt in the east.The Rakhine fold belt consists of the northern compressive fold belt and the southern strike-slip fault belt.In the northern compressive fold belt develop a lot of NNW-trending linear folds that can be subdivided into steep folds with high amplitude caused by the intensive tectonic deformation from east to west.In the southern strike-slip fault belt,some anticlines form along the strike-slip fault and the unambiguous flower structures.The evolution of the regional section suggests that the deformation began at the end of Late Miocene,and became intensive from the end of Pliocene to Quaternary.The structures in the east are older and more intensive than that of the west due to the regional contraction from east to west and the deformational propagation westward.The deposition center migrated from east to west after Miocene formation deposited.All the characteristics of Rakhine Basin are mainly controlled by different stress patterns caused by the subduction formed between the Indian-Australia plate and the Eurasia plate.
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