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| Tomographic study of the deep tectonics in the Yecheng-Shiquanhe area of the Tibetan Plateau | |
| 作者姓名： | G. Wittlinger G. Poupinet |
| 作者单位： | Ecole et Observatoire des Science de la Terre，67084 Strasbourg，France，LGIT-IRIGM，Universite Joseph Fourier，38041 Grenoble，France |
| 基金项目： | 国土资源部科研项目，CNRS of France |
| 摘 要： | The profile crossing the west Kunlun region cov-ers the area between the Tarim Basin and the Kara-korum Fault, which is the highest (~5000 m a.s.l.) andthe most narrow part (400—500 km from north tosouth) of the Tibetan Plateau, thus attracting great at-tention of the geological community because of itsunique tectonic features. The Geological Bureau of Xinjiang Uygur Auton-omous Region and Chinese Academy of Sciences(CAS) carried out mineral exploration and geologicalmapping in th… |
| 收稿时间： | 14 August 2003 |
Tomographic study of the deep tectonics in the Yecheng-Shiquanhe area of the Tibetan Plateau |
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| G. Wittlinger,G. Poupinet.Tomographic study of the deep tectonics in the Yecheng-Shiquanhe area of the Tibetan Plateau[J].Science in China(Earth Sciences),2005,48(4):477-483. | |
| Authors: | XUE Guangqi JIANG Mei SU Heping QIAN Hui WANG Youxue DONG Yingjun G Wittlinger G Poupinet |
| Institution: | 1. Institute of Mineral and Resources, Chinese Academy of Geological Sciences, Beijing 100037, China 2. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China 3. Graduate School, Mining University of China, Beijing 100083, China 4. Department of Resource and Environmental Engineering, Guilin Industrial University, Guilin 541004, China 5. Ecole et Observatoire des Science de la Terre, 67084 Strasbourg, France 6. LGIT-IRIGM, Universite Joseph Fourier, 38041 Grenoble, France |
| Abstract: | 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. |
| Keywords: | west Kunlun lithosphere velocity perturbation subduction |
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