The relationship between the nature of margins and the subduction of oceanic plateaus: Insights from variations in the forearc basement and sediments along the New Guinea Trench in the West Pacific

doi:10.1016/j.tecto.2024.230235

IOCAS-IR > 海洋地质与环境重点实验室

	The relationship between the nature of margins and the subduction of oceanic plateaus: Insights from variations in the forearc basement and sediments along the New Guinea Trench in the West Pacific
	Zhang, Zhengyi 1,2,4; Luan, Xiwu 3,4,6; Li, Sanzhong 1,2,4; Wang, Xiujuan 1,2,4; Dong, Dongdong 5
	2024-03-11
发表期刊	TECTONOPHYSICS
ISSN	0040-1951
卷号	874 页码:15
通讯作者	Luan, Xiwu(xluan@sdust.edu.cn)
摘要	The generation of erosive and accretionary margins has yet to be determined. Here, we explore the variations in the forearc structures of the New Guinea Trench (NGT) based on the latest high-quality multichannel seismic profiles perpendicular or subparallel to the New Guinea Trench axis. Our results reveal that for the domain of the oceanic crust subducted beneath the NGT (O-NGT), the thickness of the sedimentary strata decreases from the forearc sedimentary basin to the forearc slope. The basement is generally characterized by homogeneous intrabasement reflections, and few discontinuous, prominent layered reflections in the basement are identified. On the forearc slope, arcward-dipping fault-plane reflections have been identified within the basement, and an abrupt topographic decrease occurs in the eastern part of the forearc basement uplift. Widespread sedimentary sequences are identified as the present, transparent and horizontal seismic reflections with high continuities and low amplitudes. The sedimentary sequences show a large lateral variation of thickness and present folded features near the seaward-dipping faults due to the development of slump bodies. However, the sedimentary sequences in the forearc slope of the domain of the oceanic plateau subducted beneath the NGT (P-NGT) are obviously thicker than those of the O-NGT and present folded features. The stratigraphic thickness from the forearc sedimentary basin to the forearc slope clearly increases. Our initial results initially indicate that the NGT might constitute an internal reverse polarity subduction zone that changes from an erosive margin in the O-NGT to an accretionary margin in the P-NGT.
关键词	Forearc structures Erosion and accretionary margins Oceanic plateau New Guinea Trench
DOI	10.1016/j.tecto.2024.230235
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[92055211] ; National Natural Science Foundation of China[42106064] ; China-ASEAN Maritime Cooperation Fund Project[12120100500017001] ; Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences[MGE2021KG17] ; Taishan Scholars Program ; State Key Laboratory of Marine Geology, Tongji University[MGK202106]
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:001196521100001
出版者	ELSEVIER
WOS关键词	PAPUA-NEW-GUINEA ; TECTONIC EVOLUTION ; CAROLINE RIDGE ; IRIAN-JAYA ; CONTINENTAL-CRUST ; SOLOMON-ISLANDS ; COSTA-RICA ; YAP TRENCH ; EROSION ; MODEL
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/185026
专题	海洋地质与环境重点实验室
通讯作者	Luan, Xiwu
作者单位	1.Ocean Univ China, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Key Lab Submarine Geosci & Prospecting Tech, MOE, Qingdao 266100, Peoples R China 2.Ocean Univ China, Coll Marine Geosci, Qingdao 266100, Peoples R China 3.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Peoples R China 4.Laoshan Lab, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 6.Shandong Univ Sci & Technol, Qingdao 266590, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhengyi,Luan, Xiwu,Li, Sanzhong,et al. The relationship between the nature of margins and the subduction of oceanic plateaus: Insights from variations in the forearc basement and sediments along the New Guinea Trench in the West Pacific[J]. TECTONOPHYSICS,2024,874:15.
APA	Zhang, Zhengyi,Luan, Xiwu,Li, Sanzhong,Wang, Xiujuan,&Dong, Dongdong.(2024).The relationship between the nature of margins and the subduction of oceanic plateaus: Insights from variations in the forearc basement and sediments along the New Guinea Trench in the West Pacific.TECTONOPHYSICS,874,15.
MLA	Zhang, Zhengyi,et al."The relationship between the nature of margins and the subduction of oceanic plateaus: Insights from variations in the forearc basement and sediments along the New Guinea Trench in the West Pacific".TECTONOPHYSICS 874(2024):15.