THE ANALYSIS OF CSAMT RESPONSES OF DYKE EMBEDDED BELOW CONDUCTIVE OVERBURDEN

doi:10.3969/j.issn.0001-5733.2010.03.022

	THE ANALYSIS OF CSAMT RESPONSES OF DYKE EMBEDDED BELOW CONDUCTIVE OVERBURDEN
	Wang Ruo 1; Endo, Masashi 2; Di Qing-Yun 1; Wang Miao-Yue 1
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2010-03-01
卷号	53 期号:3 页码:677-684
关键词	3D dyke model CIE method Optimal configuration Influence factors
ISSN号	0001-5733
DOI	10.3969/j.issn.0001-5733.2010.03.022
文献子类	Article
英文摘要	Three-dimensional (3D) electromagnetic (EM) fields of a conductive dyke with a conductive overburden are simulated numerically using 31) contraction integral equation (CIE) method to discuss the optimal survey configuration of the controlled-source audio-frequency magnetotelluric (CSAMT) method in order for the exploration of conductive dyke-type target. The calculation results show that the most effective configuration of the transmitter is the case that the direction of the grounded-wire transmitter is along the strike of dyke. In this configuration, the ratio of anomalous fields to primary fields becomes larger than those of any other survey configurations. Using the optimal survey configuration, we also investigate the detectability of the conductive dyke. We calculate the anomalous fields E(ya) and H(xa), which are the responses of the conductive dyke only, and compare them to the noise level for the cases that the depth and the height of the conductive dyke are variable. When the depth of top of the dyke increases, the detectability of the conductive dyke decreases. Also, the effect of the height of the dyke to the amplitude of the anomalous fields is much smaller than that of the depth, so that it is usually difficult to detect the height of the dyke by general CSAMT measurement even with the optimal survey configuration. The measurement using borehole can be helpful to address this problem.
WOS关键词	INVERSION ; SERIES
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000276335700022
资助机构	(kzcx2-yw-113) ; (kzcx2-yw-113) ; (kzcx2-yw-1.21) ; (kzcx2-yw-1.21) ; (kzcxl-yw-15-4) ; (kzcxl-yw-15-4) ; (kzcx2-yw-113) ; (kzcx2-yw-113) ; (kzcx2-yw-1.21) ; (kzcx2-yw-1.21) ; (kzcxl-yw-15-4) ; (kzcxl-yw-15-4) ; (kzcx2-yw-113) ; (kzcx2-yw-113) ; (kzcx2-yw-1.21) ; (kzcx2-yw-1.21) ; (kzcxl-yw-15-4) ; (kzcxl-yw-15-4) ; (kzcx2-yw-113) ; (kzcx2-yw-113) ; (kzcx2-yw-1.21) ; (kzcx2-yw-1.21) ; (kzcxl-yw-15-4) ; (kzcxl-yw-15-4)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/72280]
专题	中国科学院地质与地球物理研究所
通讯作者	Wang Ruo
作者单位	1.CAS, Inst Geol & Geophys, Key Lab Engn Geomech, Beijing 100029, Peoples R China 2.Univ Utah, CEMI, Salt Lake City, UT 84112 USA
推荐引用方式 GB/T 7714	Wang Ruo,Endo, Masashi,Di Qing-Yun,et al. THE ANALYSIS OF CSAMT RESPONSES OF DYKE EMBEDDED BELOW CONDUCTIVE OVERBURDEN[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2010,53(3):677-684.
APA	Wang Ruo,Endo, Masashi,Di Qing-Yun,&Wang Miao-Yue.(2010).THE ANALYSIS OF CSAMT RESPONSES OF DYKE EMBEDDED BELOW CONDUCTIVE OVERBURDEN.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,53(3),677-684.
MLA	Wang Ruo,et al."THE ANALYSIS OF CSAMT RESPONSES OF DYKE EMBEDDED BELOW CONDUCTIVE OVERBURDEN".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 53.3(2010):677-684.