Study on the response and optimal observation area for SOTEM

doi:10.6038/cjg20160231

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 > 中国科学院矿产资源研究重点实验室

	Study on the response and optimal observation area for SOTEM
	Chen Wei-Ying 1; Xue Guo-Qiang 1,2; Cui Jiang-Wei 1; Zhong Hua-Sen 1
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2016-02-01
卷号	59 期号:2 页码:739-748
关键词	TEM Electric source Short offset SOTEM Optimal observation area
DOI	10.6038/cjg20160231
文献子类	Article
英文摘要	SOTEM is a kind of time domain electromagnetic method with great detecting depth and high resolution. In order to further understand and promote this method, studies on its distribution of electromagnetic field response and diffusion characteristics was conducted in this paper. Calculation results based on the 1D forwarding theory of SOTEM indicate that grounded wire source can excite both horizontal and vertical induced current under ground. The horizontal current includes upper and lower parts (also called return current). The maximum of horizontal induced current mainly focus on the area close to the source and diffuses downward vertically. The maximum of vertical induced current diffuses along the direction of 45 degrees with the ground surface With a weaker amplitude and faster speed than horizontal induced current. All the six EM components have the ability for geophysical detection. However, in consideration of the diffusion characteristics of each component and observation convenience, vertical magnetic component H-z (partial derivative B/partial derivative t) and horizontal electric component E-x are the mostly used in practical. Magnetic component (H-z) is more sensitive to low resistance body and it mainly focuses on the region close to equator area. Electric component (E-x) shows same sensitivity to both low and high resistance body, while low resistance sensitive area mainly focuses on the region close to equator and high resistance sensitive mainly focuses on axial region, and the distance between sensitive region and source is depended on the buried depth of targets and resistivity of overburden.
WOS关键词	ELECTROMAGNETIC SMOKE RING ; GROUNDED WIRE SOURCE ; FIELDS
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000369565200031
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62076]
专题	地质与地球物理研究所_中国科学院矿产资源研究重点实验室
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Minist Land & Resources, Key Lab Coal Resources Explorat & Comprehens Util, Xian 710054, Peoples R China
推荐引用方式 GB/T 7714	Chen Wei-Ying,Xue Guo-Qiang,Cui Jiang-Wei,et al. Study on the response and optimal observation area for SOTEM[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2016,59(2):739-748.
APA	Chen Wei-Ying,Xue Guo-Qiang,Cui Jiang-Wei,&Zhong Hua-Sen.(2016).Study on the response and optimal observation area for SOTEM.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,59(2),739-748.
MLA	Chen Wei-Ying,et al."Study on the response and optimal observation area for SOTEM".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 59.2(2016):739-748.