Tomographic study of the deep tectonics in the Yecheng-Shiquanhe area of the Tibetan Plateau
The Yecheng-Shiquanhe profile runs over the western Tibetan Plateau from the south margin of the Tarim Basin, crossing the west Kunlun orogeny, to the east of Karakorum. The authors applied body waves to 3-dimensional inversion of travel time residuals and outlined the deep tectonic pattern of the northwestern Tibetan Plateau. An image was obtained, showing that the Tarim lithosphere is subducted southwards underneath the west Kunlun orogeny at an angle of 40° and a depth of 280 km. Surface structures are well expressed in the image and can be further traced in deeper levels. The prominent finding is that the Gozha Fault and Karakax Fault are likely to join together beyond a depth of ～200 km, which is the very zone of active seismicity.
作 者： XUE Guangqi JIANG Mei SU Heping QIAN Hui WANG Youxue DONG Yingjun G. Wittlinger G. Poupinet 作者单位： XUE Guangqi,DONG Yingjun(Institute of Mineral and Resources, Chinese Academy of Geological Sciences, Beijing 100037, China)JIANG Mei,SU Heping(Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China)
QIAN Hui(Graduate School, Mining University of China, Beijing 100083, China)
WANG Youxue(Department of Resource and Environmental Engineering, Guilin Industrial University, Guilin 541004, China)
G. Wittlinger(Ecole et Observatoire des Science de la Terre, 67084 Strasbourg, France)
G. Poupinet(LGIT-IRIGM, Universite Joseph Fourier, 38041 Grenoble, France)
刊 名： 中国科学D辑（英文版） SCI 英文刊名： SCIENCE IN CHINA SERIES D: EARTH SCIENCES 年，卷(期)： 2005 48(4) 分类号： P3 关键词： west Kunlun lithosphere velocity perturbation subduction