Crustal Velocity Structure beneath the Shandong-Jiangsu-Anhui Segment of the Tancheng-Lujiang Fault Zone and Adjacent Areas

详细信息   

• 责任者：Huang Yun (Earthquake Administration of Jiangsu Province ; Nanjing 210014 ; China) ; Li Qinghe
• 刊名：Chinese Journal of Geophysics
• 出版年：2011
• 卷期：54(10)
• 关键词：断裂带 ; fracture zones ; 郯庐断裂带 ; Tancheng-Lujiang Fault Zone
• 页码：p.2549-2559
• 图表：6 illus., 52 refs.
• 分类号：0300
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

In this paper, the authors developed a multiphase traveltime inversion （MUTI） algorithm to inverse crust velocity structure. The 3D velocity structute beneath the Shandong-Jiangsu-Anhui segment of the Tancheng-Lujiang Fault Zone and adjacent areas was imaged by seismic tomography. The results show that 1) there are evident velocity differences among different tectonic units in the research area; 2) the P-velocities of UHPM belt are higher than adjacent areas in the upper crust and lower crust; 3) there are low-velocity areas in the range of 30°~36°N, 115°h 124°E at depths 20~25 km; 4）the Moho depths are deeper in the southwest and shallower in the northeast; and 5) the velocity structure of the Tancheng-Lujiang Fault Zone in the research area exhibits segmentation.