Portal de Periódicos da CAPES

High‐Resolution Lithospheric Velocity Structure of Continental China by Double‐Difference Seismic Travel‐Time Tomography

2018; Seismological Society of America; Volume: 90; Issue: 1 Linguagem: Inglês

10.1785/0220180209

1938-2057

Hailiang Xin, Haijiang Zhang, Min Kang, Rizheng He, Lei Gao, Ji Gao,

earthquake and tectonic studies

Research Article| October 31, 2018 High‐Resolution Lithospheric Velocity Structure of Continental China by Double‐Difference Seismic Travel‐Time Tomography Hailiang Xin; Hailiang Xin aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, China, zhang11@ustc.edu.cndAlso at Geophysical Exploration Center, China Earthquake Administration, 75 Wenhua Road, Zhengzhou 450002, China. Search for other works by this author on: GSW Google Scholar Haijiang Zhang; Haijiang Zhang aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, China, zhang11@ustc.edu.cn Search for other works by this author on: GSW Google Scholar Min Kang; Min Kang bGeophysical Exploration Center, China Earthquake Administration, 75 Wenhua Road, Zhengzhou 450002, China Search for other works by this author on: GSW Google Scholar Rizheng He; Rizheng He cChina Deep Exploration Center of the Chinese Academy of Geological Sciences, Key Laboratory of Earth Probe and Geodynamics, 26 Baiwanzhuang Avenue, Beijing 100037, China Search for other works by this author on: GSW Google Scholar Lei Gao; Lei Gao aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, China, zhang11@ustc.edu.cn Search for other works by this author on: GSW Google Scholar Ji Gao Ji Gao aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, China, zhang11@ustc.edu.cn Search for other works by this author on: GSW Google Scholar Author and Article Information Hailiang Xin aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, China, zhang11@ustc.edu.cndAlso at Geophysical Exploration Center, China Earthquake Administration, 75 Wenhua Road, Zhengzhou 450002, China. Haijiang Zhang aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, China, zhang11@ustc.edu.cn Min Kang bGeophysical Exploration Center, China Earthquake Administration, 75 Wenhua Road, Zhengzhou 450002, China Rizheng He cChina Deep Exploration Center of the Chinese Academy of Geological Sciences, Key Laboratory of Earth Probe and Geodynamics, 26 Baiwanzhuang Avenue, Beijing 100037, China Lei Gao aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, China, zhang11@ustc.edu.cn Ji Gao aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, China, zhang11@ustc.edu.cn Publisher: Seismological Society of America First Online: 31 Oct 2018 Online Issn: 1938-2057 Print Issn: 0895-0695 © Seismological Society of America Seismological Research Letters (2019) 90 (1): 229–241. https://doi.org/10.1785/0220180209 Article history First Online: 31 Oct 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Hailiang Xin, Haijiang Zhang, Min Kang, Rizheng He, Lei Gao, Ji Gao; High‐Resolution Lithospheric Velocity Structure of Continental China by Double‐Difference Seismic Travel‐Time Tomography. Seismological Research Letters 2018;; 90 (1): 229–241. doi: https://doi.org/10.1785/0220180209 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietySeismological Research Letters Search Advanced Search ABSTRACT To determine high‐resolution VP and VS models of the lithosphere of continental China, we assembled numerous high‐quality arrival‐time data from 11,953 earthquakes recorded by the China Digital Seismic Network. Double‐difference (DD) seismic tomography is applied to simultaneously determine earthquake locations and VP and VS models. Two inversion grids with grid intervals of 1° and 0.5° are sequentially used. The inverted velocity models with the coarser grid are used as the initial models for the finer grid. For the inversion with the coarser grid, the 3D VS model from ambient noise tomography and the converted VP model based on an empirical relationship between VP and VS are used as the initial models. The checkerboard resolution test shows that with the current data configuration both VP and VS models down to 150 km have a spatial resolution of 1° in the horizontal direction in most of continental China and up to 0.5° in eastern China. The inverted velocity models are further validated by arrival times from active sources and surface‐wave data. The VP model is also consistent with that along the deep seismic sounding (DSS) profile. High‐resolution VP and VS models of crust and upper mantle down to 150 km provide important constraints on tectonics beneath continental China. We name the inverted velocity models as USTClitho1.0 (Unified Seismic Tomography models for continental China lithosphere) for easy reference. Overall, our tomographic images in the shallow crust correlate well with surface geology. In the deeper part, our velocity models show some well‐known features, such as a low‐velocity layer in the middle crust beneath the Tibetan plateau (TP) and a thin lithosphere beneath the North China craton. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.