3D gravity anomaly separation method taking into account the gravity response of the inhomogeneous mantle

doi:10.1016/j.jseaes.2018.06.006

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院油气资源研究重点实验室

	3D gravity anomaly separation method taking into account the gravity response of the inhomogeneous mantle
	Liu, Kang 4,5,6; Hao, Tianyao 2,4,5,6; Yang, Hui 3; Wen, Baihong 3; Hu, Weijian 5,6; He, Enyuan 1; Xu, Ya 4,5,6
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2018-09-01
卷号	163 页码:212-223
关键词	Integrated geophysics Inhomogeneous mantle Gravity anomaly separation 3D forward modeling Residual gravity anomaly Sichuan Basin
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2018.06.006
英文摘要	In order to ensure that the gravity data processing and inversion are consistent with the actual geology, we propose that, in integrated geophysical research, 3D gravity anomaly separation (GAS) should take into account the gravity response of the inhomogeneous mantle. This is an effective method by which the residual gravity anomaly (RGA) may be obtained, as well as an important basis for the inversion and interpretation of gravity data. Aimed at the petroliferous basin structure, evolution of continental margin, ocean continental transition zone and other widely discussed geological problems, we extensively investigate the upper mantle structure in many regions around the world, and the results show that the lateral inhomogeneity of the mantle is widespread. In many comprehensive studies based on gravity and seismic data, the gravity anomaly modeling and separation are typically performed within the crust (above the Moho), which actually relies on an assumption of homogeneous mantle. Although this assumption simplifies the difficulty of the gravity modeling and separation, it ignores gravity anomalies caused by inhomogeneities of the deep mantle. The RGA, along with the inverted density structure and other interpretations, involves the risk of deviating from the actual geology. On the basis of the 2D forward calculation of several typical interface models, we implement the quantitative analysis of the effect that the inhomogeneous mantle has on the Bouguer gravity anomaly. In case studies of the southeastern United States and the Sichuan Basin, taking the shear wave velocity (Vs) structure of the upper mantle as the constraint condition, we calculate the gravity anomaly caused by the inhomogeneous mantle by means of the forward method. It is found that the gravity response of the inhomogeneous mantle cannot be neglected. Therefore, we conduct 2.5D joint simulation combining gravity and seismic data in the Sichuan Basin. The fitting results after separating the gravity response of the inhomogeneous mantle are clearly superior to those of the homogeneous mantle hypothesis. On the basis of the 3D depth data of several sedimentary strata, the Moho and the mantle high-velocity bodies, we implement 3D GAS, obtain the RGA of the basement in the Sichuan Basin, and discuss the geological origin of the "Dazu high gravity".
资助项目	Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China[GZH200900504-207] ; National Natural Science Foundation of China[41476033] ; National Natural Science Foundation of China[41210005] ; National Natural Science Foundation of China[U1505232] ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction"[GASI-GEOGE-01] ; National Key Research and Development Program of China[2016YFC0601102] ; National Key Research and Development Program of China[2016YFC0601104] ; National Science and Technology Major Project of China[2016ZX05004003]
WOS关键词	SOUTH CHINA SEA ; SURFACE-WAVE DISPERSION ; CONTINENTAL-MARGIN ; TECTONIC IMPLICATIONS ; VELOCITY STRUCTURE ; SEISMIC PROFILE ; DEEP-STRUCTURE ; SICHUAN BASIN ; FIELD DATA ; GAS-FIELD
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000439673400016
资助机构	Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; Special Projects of Geologic Surveys of Ministry of National Lands and Resources of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; Special International Cooperation Program of "Global Change and Ocean-Atmosphere Interaction" ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/94026]
专题	地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者	Hao, Tianyao
作者单位	1.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China 2.State Ocean Adm, Key Lab Submarine Geosci, Hangzhou 310012, Zhejiang, Peoples R China 3.Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 6.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Liu, Kang,Hao, Tianyao,Yang, Hui,et al. 3D gravity anomaly separation method taking into account the gravity response of the inhomogeneous mantle[J]. JOURNAL OF ASIAN EARTH SCIENCES,2018,163:212-223.
APA	Liu, Kang.,Hao, Tianyao.,Yang, Hui.,Wen, Baihong.,Hu, Weijian.,...&Xu, Ya.(2018).3D gravity anomaly separation method taking into account the gravity response of the inhomogeneous mantle.JOURNAL OF ASIAN EARTH SCIENCES,163,212-223.
MLA	Liu, Kang,et al."3D gravity anomaly separation method taking into account the gravity response of the inhomogeneous mantle".JOURNAL OF ASIAN EARTH SCIENCES 163(2018):212-223.