Crustal reflectivity characters from the Eryuan-Jiangchuan wide-angle seismic profile

	Crustal reflectivity characters from the Eryuan-Jiangchuan wide-angle seismic profile
	Zhang Zhi ; Xu Chun-Ming ; Meng Bu-Zai ; Liu Cai ; Teng Ji-Wen
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2007-07-01
卷号	50 期号:4 页码:1082-1088
关键词	wide-angle reflection/refraction crustal reflection profile migration imaging
ISSN号	0001-5733
文献子类	Article
英文摘要	By prestack migration processing to the wide angle reflection seismic data of the Eryuan-Jiangchuan profile in Yunnan Province,we obtain a crustal reflectivity section which is similar to nearly-vertical incidence seismic data. Both the reflectivity image and the crustal velocity structure jointly demonstrate that the crustal thickness thins from about 45 km on the northwestern end of the profile to about 40 km on the southeastern end. Near the northwest of Eryuan and Chuxiong, there are a series of southeast- dipping strong reflectors at depth 10 km and a series of northwest- dipping strong reflection 50 km to its southwest. Crustal reflection attributes obviously differ on the both sides of the Yimen fault. To the northwest of the Yimen fault, two sets of reflectors with strong amplitude dipping upwards lie in the middle-lower crust of depths 25 similar to 40 km, and are cut by the Chuxiong-Jianshui fault. To the southeast of Yimen fault, no obvious strong discontinuous reflection appears in the crust. This unique crustal velocity structure and reflectivity images are explained to be the results of thickening and deformation of crust under the joint action of Indian plate's eastward subduction and eastward escape of the crustal material at the eastern margin of Tibet.
WOS关键词	SOUTHEASTERN CHINA ; UPPER-MANTLE ; MIGRATION ; EXAMPLE ; YUNNAN ; BINCHUAN ; VELOCITY ; ZHEFANG ; MALONG ; TIBET
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000248343500015
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/68562]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhang Zhi
作者单位	1.Guilin Inst Technol, Dept Resource & Environm Engn, Guilin 541004, Peoples R China 2.Jilin Univ, Coll Geoexplorat Sci & Technol, Changchun 130026, Peoples R China 3.Chinese Acad Sci, Inst Geol & GeoPhys, State Key Lab Lithospher Tecton Evolut, Beijing 100029, Peoples R China 4.Liaoning Seismol Bureau, Shenyang 110031, Peoples R China
推荐引用方式 GB/T 7714	Zhang Zhi,Xu Chun-Ming,Meng Bu-Zai,et al. Crustal reflectivity characters from the Eryuan-Jiangchuan wide-angle seismic profile[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2007,50(4):1082-1088.
APA	Zhang Zhi,Xu Chun-Ming,Meng Bu-Zai,Liu Cai,&Teng Ji-Wen.(2007).Crustal reflectivity characters from the Eryuan-Jiangchuan wide-angle seismic profile.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,50(4),1082-1088.
MLA	Zhang Zhi,et al."Crustal reflectivity characters from the Eryuan-Jiangchuan wide-angle seismic profile".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 50.4(2007):1082-1088.