Three-dimensional joint inversion of magnetotelluric and seismic travel;time data with cross-gradient constraints

doi:10.6038/cjg20130821

	Three-dimensional joint inversion of magnetotelluric and seismic travel;time data with cross-gradient constraints
	Peng Miao 3; Tan Han-Dong ; Jiang Mei ; Qian Hui ; Tan Jia-Yan
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2013
卷号	56 期号:8 页码:2728-2738
关键词	Joint inversion Cross-gradient Magnetotellurics Seismic refraction
ISSN号	0001-5733
DOI	10.6038/cjg20130821
英文摘要	To effectively overcome the weak consistency of single inversion of magnetotelluric (or teleseismic travel time data), and also to solve the limitations' of petrophysical approach, we study a three-dimensional joint inversion algorithm of magnetotelluric and seismic travel time data with cross-gradient constraints. Based on well-developed three-dimensional teleseismic and magnetotelluric forward and inversion algorithms, a three-dimensional joint inversion algorithm having common inversion grids, with cross-gradient as structural constraint, and with both resistivity and velocity models able to be simultaneously obtained has been achieved. With synthetic data from a single-prism model and two double-prism models, trial computation of joint inversion has been carried out, and the results indicate that, compared with single inversion, joint inversion has better effect in recovering both single prism' s and double-prism' s spatial morphology. The resistivity value of the single-prism is much closer to the true model in joint inversion, while by double-prism models, joint inversion not only removes false resistivity anomaly of wall rock to a certain degree, but also has large improvement on increasing the resolution of P-wave deep structure of anomalous body. Moreover, joint inversion improve the separate inversion results when resistivity and velocity is incompatible, indicating the cross-gradient is not be restricted on the relationship of different petrophysical parameters, focuses on structural similarity and thus has wide applicability. but rather focuses on structural similarity and thus has wide applicability.
学科主题	地球物理勘探
WOS关键词	EASTERN HIMALAYAN SYNTAXIS ; NEAR-SURFACE MATERIALS ; RESISTIVITY ; VELOCITY ; 3-D ; MT ; REFRACTION ; GRAVITY
WOS研究方向	Geochemistry & Geophysics
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000323854200021
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40088]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Geol Sci, Inst Geol, State Key Lab Continental Tecton & Dynam, Beijing 100037, Peoples R China. 2.China Univ Geosci, Sch Geophys & Informat Technol, Beijing 100083, Peoples R China. 3.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Peng Miao,Tan Han-Dong,Jiang Mei,et al. Three-dimensional joint inversion of magnetotelluric and seismic travel;time data with cross-gradient constraints[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2013,56(8):2728-2738.
APA	Peng Miao,Tan Han-Dong,Jiang Mei,Qian Hui,&Tan Jia-Yan.(2013).Three-dimensional joint inversion of magnetotelluric and seismic travel;time data with cross-gradient constraints.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,56(8),2728-2738.
MLA	Peng Miao,et al."Three-dimensional joint inversion of magnetotelluric and seismic travel;time data with cross-gradient constraints".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 56.8(2013):2728-2738.