Crustal structure from onshore-offshore wide-angle seismic data: Application to Northern Sulu Orogen and its adjacent area

doi:10.1016/j.tecto.2019.228220

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋地质与环境重点实验室

	Crustal structure from onshore-offshore wide-angle seismic data: Application to Northern Sulu Orogen and its adjacent area
	Zhao, Weina 5,6; Wang, Huigang 1; Shi, Hongcai 2; Xie, Hui 2; Wu, Zhiqiang 3; Chen, Shanshan 3; Zhang, Xunhua 8; Hao, Tianyao 7; Zheng, Yanpeng 4
刊名	TECTONOPHYSICS
	2019-11-05
卷号	770 页码:12
关键词	Northern Sulu Orogen Wide-angle seismic survey 2-D crustal structure Subduction polarity Orogenic boundary
ISSN号	0040-1951
DOI	10.1016/j.tecto.2019.228220
通讯作者	Wu, Zhiqiang(wuzq_1964@126.com)
英文摘要	The Northern Sulu Orogen is the northeastern part of the Dabie-Sulu Orogen, which formed during the Triassic collision between the North China Block (NCB) and the South China Block (SCB). The lack of detail in the onshore-offshore seismic model in the crustal levels means that the deep boundaries and subduction polarity of the Northern Sulu Orogen remain ambiguous. To obtain insight into the contact relationship between the NCB and SCB and their tectonic implication, we processed the onshore-offshore wide-angle seismic data from 32 sections that were acquired in 2013 in order to achieve a continuous 2-D velocity and interface model. The results show that three parts exhibit significant differences in the P-wave velocities, interface depths and intracrustal structures, which all correlate well with the regional geology and tectonics. In the northern and southern parts of the survey area, the upper crust displays low-velocity layers that represent the NCB and the SCB, respectively. The Northern Sulu Orogen is characterized by the relatively faster p-waves, which result from the influence of collision and exhumation. The undulating interfaces together reveal that the southern and northern boundaries of the Northern Sulu Orogen are deep faults that deeply cut through the Moho and have northwest dips in the middle and lower crust. The different crustal nature of three regions suggests that the NCB and SCB crusts have different responses to the continental collision. Our observations, combined with data from previous studies, support that the Northern Sulu Orogen developed during the Indosinian Orogeny, with a northward subduction polarity of the SCB beneath the NCB.
资助项目	National Natural Science Foundation of China[41806048] ; National Natural Science Foundation of China[412100051] ; Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences[MGE2018KG11] ; National High Technique RD Program (863)[2009AA093401] ; Aoshan Science and Technology Innovation Project of Qingdao National Laboratory of Marine Science and Technology[2015ASKJ03] ; Fundamental Research Funds for the Central Universities[31020190QD032]
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000498329500003
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/163828]
专题	海洋研究所_海洋地质与环境重点实验室
通讯作者	Wu, Zhiqiang
作者单位	1.Northwestern Polytech Univ, Sch Marine Sci & Technol, Xian 710072, Shaanxi, Peoples R China 2.Guangdong Ocean Univ, Guangdong Prov Key Lab Coastal Ocean Variat & Dis, Zhanjiang 524088, Peoples R China 3.Qingdao Inst Marine Geol, Qingdao 266071, Shandong, Peoples R China 4.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Shandong, Peoples R China 5.Northwestern Polytech Univ, Qingdao Res Inst, Qingdao 266200, Shandong, Peoples R China 6.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Shandong, Peoples R China 7.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 8.China Geol Survey, Nanjing Ctr, Nanjing 210016, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Weina,Wang, Huigang,Shi, Hongcai,et al. Crustal structure from onshore-offshore wide-angle seismic data: Application to Northern Sulu Orogen and its adjacent area[J]. TECTONOPHYSICS,2019,770:12.
APA	Zhao, Weina.,Wang, Huigang.,Shi, Hongcai.,Xie, Hui.,Wu, Zhiqiang.,...&Zheng, Yanpeng.(2019).Crustal structure from onshore-offshore wide-angle seismic data: Application to Northern Sulu Orogen and its adjacent area.TECTONOPHYSICS,770,12.
MLA	Zhao, Weina,et al."Crustal structure from onshore-offshore wide-angle seismic data: Application to Northern Sulu Orogen and its adjacent area".TECTONOPHYSICS 770(2019):12.