%0 Journal Article
%T Velocity structure of the crust and uppermost mantle in the boundary area of the Tianshan Mountains and the Tarim Basin
%A Ning Mi
%A Liangshu Wang
%A Hua Li
%A Mingjie Xu
%A Yunping Chen
%A Cheng Li
%A Yong Zhang
%A Dayong Yu
%A <br>MINing
%A WANGLiangshu
%A LIHua
%A XUMingjie
%A CHENYunping
%A LICheng
%A ZHANGYong
%A YUDayong
%J 科学通报(英文版)
%D 2005
%I 
%X A portable 3-component broadband digital seismic array was deployed across the Tianshan orogenic belt (TOB) to investigate the lithospheric structure. Based on receiver function analysis of the teleseismic P-wave data, a 2-D S-wave velocity profile of the boundary area of the TOB and the Tarim Basin was obtained at the depths of 0–80 km. Our results reveal a vertical and lateral inhomogeneity in the crust and uppermost mantle. Four velocity interfaces divide the crystalline crust into the upper, middle and lower crust. A low velocity zone is widely observed in the upper-middle crust. The depth of Moho varies between 42 and 52 km. At the north end of the profile the Moho dips northward with a vertical offset of 4–6 km, which implies a subduction front of the Tarim Basin into the TOB. The Moho generally appears as a velocity transitional zone except beneath two stations in the northern Tarim Basin, where the Moho is characterized by a typical velocity discontinuity. The fine velocity structure and the deep contact deformation of the crust and upper most mantle delineate the north-south lithospheric shortening and thickening in the boundary area of the TOB and the Tarim Basin, which would be helpful to constructing the geodynamical model of the intracontinental mountain-basin-coupling system.
%K Tianshan orogenic belt
%K receiver function
%K low velocity zone
%K mountain-basin-coupling system<br>天山山脉
%K 塔里木盆地
%K 岩石层
%K 造山带
%K 地质学
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=14113BF896A0F163CA47780559ADA71D&yid=2DD7160C83D0ACED&vid=771152D1ADC1C0EB&iid=38B194292C032A66&sid=B7BFA4B351E4C682&eid=7979125BBE749348&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=4&reference_num=20