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  4. 岩石圈演化国家重点实验室
Formation mechanism of the North-South Gravity Lineament in eastern China

文献类型：期刊论文

作者Deng, Yangfan1,2; Xu, Yi-Gang1,2; Chen, Yun2,3
刊名TECTONOPHYSICS
出版日期2021-11-05
卷号818页码:9
关键词North-South Gravity Lineament Crustal thickness Crustal density Lithospheric density Mantle transition zone structure Gravity modeling
ISSN号0040-1951
DOI10.1016/j.tecto.2021.229074
英文摘要Gravity lineaments are well recognized along plate boundaries and in the interiors of oceanic plates. However, the formation mechanism of intracontinental gravity lineaments remains poorly understood. The North-South Gravity Lineament (NSGL), which extends >4000 km from Russia to South China, is characterized by an abrupt change in the observed Bouguer gravity anomaly, ranging from -100 mGal in the west to -40 mGal in the east over a distance of <100 km. Here we employ gravity modeling along a deep seismic sounding profile that transects the NSGL to delineate the relative contributions of the thickness and composition of the crustal and upper mantle and the stagnant slab in the mantle transition zone to the observed gravity anomaly, and to ultimately constrain the formation mechanism of the NSGL. Our results indicate that crustal thickness is the dominant factor in the formation of the NSGL, with lithospheric composition also playing a role. Combining our results with those of previous studies, lateral variations in the lithospheric mantle composition and crustal/ lithospheric thickness across the NSGL can be attributed to lithospheric thinning and mantle replacement in the eastern part of the North China Craton during the late Mesozoic. This was triggered by the subduction of the Paleo-Pacific plate and subsequently led to the persistence of a stagnant slab and big mantle wedge. This study highlights the fundamental need for integrated geophysical-petrological analyses to better understand the surface response to deep tectonic processes.
WOS关键词LITHOSPHERIC MANTLE BENEATH ; PERIDOTITE XENOLITHS ; STAGNANT SLAB ; INTRAPLATE VOLCANISM ; VELOCITY STRUCTURE ; THERMAL STRUCTURE ; OS ISOTOPES ; NE CHINA ; CRATON ; CRUSTAL
资助项目Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB18000000] ; National Science Foundation of China[41874106] ; National Science Foundation of China[42021002] ; Youth Innovation Promotion Association CAS[YIPA2018035]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000703690400006
出版者ELSEVIER
资助机构Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS
源URL[http://ir.iggcas.ac.cn/handle/132A11/102719]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Deng, Yangfan; Xu, Yi-Gang; Chen, Yun
作者单位1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China
2.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Deng, Yangfan,Xu, Yi-Gang,Chen, Yun. Formation mechanism of the North-South Gravity Lineament in eastern China[J]. TECTONOPHYSICS,2021,818:9.
APA Deng, Yangfan,Xu, Yi-Gang,&Chen, Yun.(2021).Formation mechanism of the North-South Gravity Lineament in eastern China.TECTONOPHYSICS,818,9.
MLA Deng, Yangfan,et al."Formation mechanism of the North-South Gravity Lineament in eastern China".TECTONOPHYSICS 818(2021):9.

入库方式： OAI收割

来源：地质与地球物理研究所

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