Joint inversion of gravity-magnetic-seismic data of a typical profile in the China Sea-Western Pacific area

doi:10.6038/cjg2018L0301

IOCAS-IR > 海洋地质与环境重点实验室

	Joint inversion of gravity-magnetic-seismic data of a typical profile in the China Sea-Western Pacific area
	Zhang ZhengYi 1,3; Fan JianKe 1,2; Bai YongLiang 4; Dong DongDong 1,2
	2018-07-01
发表期刊	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
ISSN	0001-5733
卷号	61 期号:7 页码:2871-2891
通讯作者	Fan JianKe([email protected])
摘要	The joint inversion of gravity-magnetic-seismic data is an important method to acquire the crustal structure. In this study, we analyse the Moho depth, the crustal structure and abnormal bodies distribution of a typical profile in the China Sea-Western Pacific area based on the latest bathymetric, gravity and magnetic anomaly, sediment thickness, measured seismic data and previous works. It reveals that the crust becomes thinner, younger and simpler from Zhejiang to the Mariana subduction zone. In Zhejiang area (including the Yangtze and the Cathaysia blocks) , the crustal structure is complex and three-layered, in which, extensive magmatic intrusion bodies are distributed along the fault zones. In the East China Sea, the Moho depth and the crustal thickness change violently. Especially the Okinawa Trough, features the thinner and transitional crust. In the West Philippine Basin, the Kyushu-Palau Ridge, the Parece Vela Basin and the Mariana subduction zone, the crustal structure is simple and two-layered, and the magnetic anomalies change severely due to the wide distribution of abnormal bodies which were formed during the spreading period. The crustal thickness of the West Philippine Basin and the Parece Vela Basin (similar to 5 similar to 8 km) are thinner than that of the typical continent, whereas the crust of the Kyushu-Palau Ridge has a thickness of similar to 20 km and shows the nature of the arc, which is absent of the middle crust. In the Kyushu-Palau Ridge, the magnetic abnormal bodies formed during the spreading of the West Philippine Basin and the Parece Vela Basin. The West Mariana Arc and the East Mariana Volcanic Arc have similar crustal structure, in which the magnetic abnormal bodies distribute widely at the shallow depth. It indicates that they originated from the same arc. The crustal thickness of the West Mariana Arc (similar to 17 km) is thinner than that of the East Mariana volcanic Arc (similar to 20 km), suggesting the asymmetric splitting or spreading of the arc. The Mariana Trough has a normal oceanic structure (similar to 7 km) and there is no obvious rupture in the spreading center. According to our research, we suggest that the continental crust is not isolated from the oceanic crust, and could transform into the oceanic crust. The plate evolution is always in the process of dynamic cycle. This study strengthens our understanding about the deep tectonic features of the China Sea-Western Pacific, the continental margin evolution and the plate interaction profoundly.
关键词	China Sea-Western Pacific Joint inversion of gravity-magnetic-seismic data Crustal structure
DOI	10.6038/cjg2018L0301
收录类别	SCI
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000438837800018
出版者	SCIENCE PRESS
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/163447
专题	海洋地质与环境重点实验室
通讯作者	Fan JianKe
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.China Univ Petr, Qingdao 266580, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Zhang ZhengYi,Fan JianKe,Bai YongLiang,et al. Joint inversion of gravity-magnetic-seismic data of a typical profile in the China Sea-Western Pacific area[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2018,61(7):2871-2891.
APA	Zhang ZhengYi,Fan JianKe,Bai YongLiang,&Dong DongDong.(2018).Joint inversion of gravity-magnetic-seismic data of a typical profile in the China Sea-Western Pacific area.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,61(7),2871-2891.
MLA	Zhang ZhengYi,et al."Joint inversion of gravity-magnetic-seismic data of a typical profile in the China Sea-Western Pacific area".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 61.7(2018):2871-2891.