The crustal structure under Sanjiang and its dynamic implications: Revealed by seismic reflection/refraction profile between Zhefang and Binchuan, Yunnan

doi:10.1360/01yd0567

	The crustal structure under Sanjiang and its dynamic implications: Revealed by seismic reflection/refraction profile between Zhefang and Binchuan, Yunnan
	Zhang, ZJ ; Bai, ZM ; Wang, CY ; Teng, JW ; Lu, QT ; Li, JL ; Liu, YF ; Liu, ZK
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2005-09-01
卷号	48 期号:9 页码:1329-1336
关键词	Sanjiang Area Wide-angle Seismic Profile Crustal Structure
ISSN号	1006-9313
DOI	10.1360/01yd0567
文献子类	Article
英文摘要	The fault belts in Sanjiang mainly include Jinshajiang-Honghe fault, Lancangjiang fault and Nujiang fault (called Sanjiang faults) in western Yunnan Province, China. By interpreting the wide-angle seismic reflection/refraction profile between Zhefang and Binchuan, which crosses Tengchong and Baoshan blocks in Dianxi (western Yunnan) tectonic zone, we reconstruct the crustal structure with seismic traveltime tomography for crustal P-wave velocity and the seismic scattering image for crustal seismic reflection structure. In this paper, we firstly present the crustal structure images of P-wave velocity and seismic reflection under the wide-angle seismic profile. These results demonstrate that, the crustal velocity structure and seismic reflection structure along the profile can be divided into 3 segments, and there is an obvious difference of crustal structure among the eastern, the western and the middle segment. Generally, crustal P-wave velocities in the Baoshan segment are 0.1 -0.2 km/s slower and seismic reflection amplitudes from Moho discontinuity are stronger than the other 2 segments. In the studied area, crustal thickness is about 40 km, and shows the thickening tendency from west to east along the profile. Additionally, it can be seen that there is one strong-amplitude seismic reflection event as bright points at the depths of 8-10 km, along the segment of 80-115 km of the profile (southward of Tengchong); and seismic reflection wave-field from Moho discontinuity varies obviously along the lateral direction. Finally, we make some discussions on the crustal thickening pattern in the Sanjiang fault belt, structural environment of earthquake development and the contact relationship between the Tengchong block, Banshan block and Luxi trough.
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000233073800001
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/64961]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhang, ZJ
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.China Seismol Bur, Inst Geophys, Beijing 100085, Peoples R China 3.Chinese Acad Geosci, Inst Deposit Resource, Beijing 100037, Peoples R China 4.China Univ Geosci, Sch Explorat & Informat, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Zhang, ZJ,Bai, ZM,Wang, CY,et al. The crustal structure under Sanjiang and its dynamic implications: Revealed by seismic reflection/refraction profile between Zhefang and Binchuan, Yunnan[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2005,48(9):1329-1336.
APA	Zhang, ZJ.,Bai, ZM.,Wang, CY.,Teng, JW.,Lu, QT.,...&Liu, ZK.(2005).The crustal structure under Sanjiang and its dynamic implications: Revealed by seismic reflection/refraction profile between Zhefang and Binchuan, Yunnan.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,48(9),1329-1336.
MLA	Zhang, ZJ,et al."The crustal structure under Sanjiang and its dynamic implications: Revealed by seismic reflection/refraction profile between Zhefang and Binchuan, Yunnan".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 48.9(2005):1329-1336.