The thickness and structural characteristics of the crust across Tibetan plateau from active-sources seismic profiles
The thickness and structural characteristics of the crust across Tibetan plateau from active-sources seismic profiles
摘要
Abstract
The Tibetan plateau as one of the youngest orogen on the Earth was considered as the result of conti-nent-continent collision between the Eurasian and Indian plates. The thickness and structure of the crust beneath Tibetan pla-teau is essential to understand deformation behavior of the plateau. Active-source seismic profiling is most available geo-physical method for imaging the structure of the continental crust. The results from more than 25 active-sources seismic pro-files carried out in the past twenty years were reviewed in this article. A preliminary cross crustal pattern of the Tibetan Pla-teau was presented and discussed. The Moho discontinuity buries at the range of 60-80 km on average and have steep ramps located roughly beneath the sutures that are compatible with the successive stacking/accretion of the former Cenozoic blocks northeastward. The deepest Moho (near 80 km) appears closely near IYS and the crustal scale thrust system beneath southern margin of Tibetan plateau suggests strong dependence on collision and non-distributed deformation there. However, the ～20 km order of Moho offsets hardly reappears in the inline section across northern Tibetan plateau. Without a universally关键词
crustal structure/crustal thickness/active-sources seismic/Tibetan plateauKey words
crustal structure/crustal thickness/active-sources seismic/Tibetan plateau分类
天文与地球科学引用本文复制引用
Qiusheng Li,Rui Gao,Zhanwu Lu,Ye Guan,Jisheng Zhang,Pengwu Li,Haiyan Wang,Rizheng He,Marianne Karplus..The thickness and structural characteristics of the crust across Tibetan plateau from active-sources seismic profiles[J].地震学报（英文版）,2009,22(1):21-31,11.基金项目
This paper was financed by the Ministry of Land and Resources of China (2004DKA20280-2-5),Intemational Sciences and Technology cooperation (2006DFA21340),the special funds for Sciences and technology research of public welfare trades(200811021),the key innovation Project for sciences and technology of Ministry of Land and Resources(1212010711813),the China Geology survey Burcau and resources land investigation project(1212010611809),the Basic outlay of scientific research work from Ministry of Science and Technology of the People's Republic of China (J0803),the National Natu-ral Science Foundation of China (40830316 and 40874045),SINOPPROBE-II and Open Fund (NO.GDL0603_) of Key Laboratory of Geo-detection (China University of Geosciences ,Beijing),Ministry of Education". （2004DKA20280-2-5）
