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Middle Miocene renewed subduction of arabian-eurasian plates: Implications for convergent tectonic mechanisms, tectonically-induced fluid overpressures, and sediment recycling dynamics

文献类型：期刊论文

作者Khan, Umair4,5; Khan, Majid3; Wu, Shiguo1,2,4,5; Jinwei, Gao5
刊名MARINE AND PETROLEUM GEOLOGY
出版日期2024-04-01
卷号162页码:25
关键词Renewed subduction Imbricate thrust faults Fluid escape pipes Piggyback basins Growth stratal pattern Progradation
ISSN号0264-8172
DOI10.1016/j.marpetgeo.2024.106704
英文摘要The complex interplay between thrust wedge deformation, tectonically-induced fluid overpressures, and the complex phases of wedge-top sedimentary depositional systems in active plate convergent margins presents a formidable challenge. The offshore Makran accretionary wedge (MAW) is the world's largest, formed by the convergence of Arabian plate underneath Eurasian plate in the Early Cretaceous, followed by Middle Miocene renewed subduction. In this research, geological and geophysical constraints derived from seismic and borehole stratigraphy, seismic attributes, depth structural maps, isopach maps and 3D structural geological models reveal that Middle Miocene renewed subduction controls thrust wedge deformation. Additionally, it influences deep fluid overpressure and the deformational pattern of wedge-top sedimentary depositional systems. The seismic data analysis suggested that the basement pre-kinematic Himalayan turbidities depositional system (HTDs) have been tectonically incorporated into the accretionary wedge by Middle Miocene renewed subduction, which gave rise to complex folding and N-dipping imbricate thrusting features. These N-dipping imbricate thrust faults initiated sediment underplating and served as major structural pathways for deep fluid overpressure migration, resulting in the formation of fluid escape pipes. The fluid escape pipes exhibit conical and bifurcating geometries with inclination angles of approximately 73 degrees, 90 degrees, and 100 degrees, signifying the upward migration of deep overpressured fluids. Furthermore, the Middle Miocene to Pliocene syn-kinematic piggyback and growth depositional system (PGDs) show progressive thickening (Max similar to 3600 m) towards onshore MAW. It lies unconformable above the pre-kinematic HTDs and carries valuable sedimentation records, growth stratal patterns, onlap terminations, and truncations against growing structures, revealed the timing and spatial deformation of thrust faults in 3D space. In contrast, the Pleistocene to Recent post-kinematic progradational depositional system (PDs) exhibits clinoforms marked by top-lapping, on -lapping, and down -lapping reflection, which are primarily controlled by sediment recycling dynamics and sea level change since Pleistocene. It shows progressive thickening (Max similar to 1800m) towards the Makran subduction zone and lies unconformably above the syn-kinematic PGDs. Abridging the analyses, the tectonic reconstruction and deformation mechanisms model shows four phases, e.g. (1) initiation of subduction and accretionary wedge formation in Eocene, (2) N-dipping imbricate thrust faults and deep fluid overpressure triggered by Middle Miocene renewed subduction, (3) development of piggyback basins and growth stratal geometries in Middle Miocene to Pliocene, (4) thrust deformation ceases and development of progradational depositional system.
WOS关键词MAKRAN ACCRETIONARY WEDGE ; 3D STRUCTURAL MODEL ; HIKURANGI MARGIN ; ACTIVE MARGIN ; SLIP VECTORS ; BASIN ; EVOLUTION ; PRISM ; GROWTH ; FAULT
资助项目Innovation Platform for Academicians of Hainan Province[YSPTZX202204] ; National Natural Science Foundation of China[92058213]
WOS研究方向Geology
语种英语
WOS记录号WOS:001179505600001
出版者ELSEVIER SCI LTD
资助机构Innovation Platform for Academicians of Hainan Province ; National Natural Science Foundation of China
源URL[http://ir.idsse.ac.cn/handle/183446/10968]  
专题深海科学研究部_深海地球物理与资源研究室
通讯作者Wu, Shiguo
作者单位1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, 28 Luhuitou Rd, Sanya, Hainan Province, Peoples R China
2.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519000, Peoples R China
3.Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
推荐引用方式
GB/T 7714		 Khan, Umair,Khan, Majid,Wu, Shiguo,et al. Middle Miocene renewed subduction of arabian-eurasian plates: Implications for convergent tectonic mechanisms, tectonically-induced fluid overpressures, and sediment recycling dynamics[J]. MARINE AND PETROLEUM GEOLOGY,2024,162:25.
APA Khan, Umair,Khan, Majid,Wu, Shiguo,&Jinwei, Gao.(2024).Middle Miocene renewed subduction of arabian-eurasian plates: Implications for convergent tectonic mechanisms, tectonically-induced fluid overpressures, and sediment recycling dynamics.MARINE AND PETROLEUM GEOLOGY,162,25.
MLA Khan, Umair,et al."Middle Miocene renewed subduction of arabian-eurasian plates: Implications for convergent tectonic mechanisms, tectonically-induced fluid overpressures, and sediment recycling dynamics".MARINE AND PETROLEUM GEOLOGY 162(2024):25.

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来源：深海科学与工程研究所

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