气候变化领域集成服务门户(CCPortal): Lower-crust S-wave velocity beneath western Yunnan Province from waveform inversion of dense seismic observations

CCPortal

DOI	10.1111/j.1365-3121.2008.00862.x
	Lower-crust S-wave velocity beneath western Yunnan Province from waveform inversion of dense seismic observations
	Gao, Xing; Su, Youliang; Wang, Weimin; Pei, Shunping; Guo, Zhi
通讯作者	Gao, X (通讯作者)
发表日期	2009
ISSN	0954-4879
EISSN	1365-3121
起始页码	105
结束页码	110
卷号	21 期号:2
英文摘要	We use teleseismic body waveforms to explore S-wave layered velocity structures beneath 30 portable digital seismic stations deployed around western Yunnan Province. Results show that the Moho depth in this region is similar to 40 km and decreases in general from north to south, consistent with previous geophysical studies. Associated with this lateral variation of the Moho depth, the lower crust above the Moho discontinuity has a 15-25 km thick zone with an S-wave velocity lower than that of the upper crust. This lower velocity zone might be interpreted as a lower crust weak channel, which may mechanically partially decouple the upper-crust deformation from the underlying mantle. Thus, the inverted S-wave velocity structure could provide new evidence for the lateral flow of lower crust in the build-up of the south-eastern Tibetan plateau.
关键词	TIBETAN PLATEAU COLLISION ZONE SOUTHERN TIBET EASTERN TIBET RED-RIVER CHINA DEFORMATION FLOW MANTLE INDIA
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000264188300005
来源期刊	TERRA NOVA
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257617
推荐引用方式 GB/T 7714	Gao, Xing,Su, Youliang,Wang, Weimin,et al. Lower-crust S-wave velocity beneath western Yunnan Province from waveform inversion of dense seismic observations[J]. 中国科学院青藏高原研究所,2009,21(2).
APA	Gao, Xing,Su, Youliang,Wang, Weimin,Pei, Shunping,&Guo, Zhi.(2009).Lower-crust S-wave velocity beneath western Yunnan Province from waveform inversion of dense seismic observations.TERRA NOVA,21(2).
MLA	Gao, Xing,et al."Lower-crust S-wave velocity beneath western Yunnan Province from waveform inversion of dense seismic observations".TERRA NOVA 21.2(2009).