The contrast of response characteristics between large power long bipole and circle source

doi:10.6038/j.issn.0001-5733.2012.06.031

	The contrast of response characteristics between large power long bipole and circle source
	Xu Cheng 1,2; Di Qing-Yun 1; Fu Chang-Min 1; Wang Miao-Yue 1
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2012-06-01
卷号	55 期号:6 页码:2097-2104
关键词	"Earth-ionosphere"mode Long bipole and circle source Large power EM field
ISSN号	0001-5733
DOI	10.6038/j.issn.0001-5733.2012.06.031
文献子类	Article
英文摘要	In order to prospect in the deep second metallogenic belt, we have to increase the strength of source. So an EM method using fixed high power source comes into being. To increase the strength of source, the length of a bipole source, or the radius of a circle source (called magnetic source in this paper) should be much larger. However, the strength of electromagnetic signal does not depend only on transmitting source. When I. or R is tens of kilometers and receiving point is far away from source, the influence of ionosphere can't be ignored. The ionosphere may strengthen or decrease the signal, depending on the waves excited by different sources. We modeled electromagnetic wave response in a three-layer earth-ionosphere model with long bipole along x direction and found that the ionosphere increases the amplitude of the E, and H-y field, namely E-x and H-y in the wave-guide field decay more slowly. But for the circle current source(magnetic source), ionosphere makes the amplitude of the field weaker, namely E-x and H-y in the wave-guide field decays faster. For this reason, it is better to use long bipole source when working in the wave-guide field with a fixed large power source.
WOS关键词	APPROXIMATION ; BORN
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000306159400031
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84768]
专题	中国科学院地质与地球物理研究所
通讯作者	Xu Cheng
作者单位	1.Chinese Acad Sci, Key Lab Engn Geomech, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Xu Cheng,Di Qing-Yun,Fu Chang-Min,et al. The contrast of response characteristics between large power long bipole and circle source[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2012,55(6):2097-2104.
APA	Xu Cheng,Di Qing-Yun,Fu Chang-Min,&Wang Miao-Yue.(2012).The contrast of response characteristics between large power long bipole and circle source.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,55(6),2097-2104.
MLA	Xu Cheng,et al."The contrast of response characteristics between large power long bipole and circle source".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 55.6(2012):2097-2104.