| Lateral Inhomogeneity of Basement Layer in Three Gorges Region of Changjiang River (Yangtze River) |
| |
| 作者姓名： | Bian Yinju Hu Hongxiang and Gao ShiyuInstitute of Geophysics SSB Beijing China |
| |
| 作者单位： | Bian Yinju，Hu Hongxiang，and Gao ShiyuInstitute of Geophysics，SSB，Beijing 100081，China |
| |
| 基金项目： | This project was sponsored by the Joint Earthquake Science Foundation (93084), China. Contribution No. 96A0095, Institute of Geophysics, SSB, China |
| |
| 摘 要： | Seismic tomography from the Pg wave data along the non-longitudinal profile in the Three Gorges Region is presented in this paper.The seismic tomography method,and the acquisition and analysis of seismic travel time are broadly outlined.The tomography of basement reveals a great amount of significant information and shows that the low-velocity zone is due to the lithologic difference and the fault fracture zone.It also demonstrates that there exist three high-velocity zones with v>6.4 km/s at the basement; the largest of zones which strikes north-south is located at the southwestern side of Huangling Anticlinorium and extends into the anticlinorium northward.The other two high-velocity zones are,respectively,situated at the eastern side of the anticlinorium and the western side of the profile.The high-velocity zones are inferred to originate from the upwelling of material with high-velocity from deep crust.
|
Lateral Inhomogeneity of Basement Layer in Three Gorges Region of Changjiang River (Yangtze River) |
| |
| Bian Yinju,Hu Hongxiang,and Gao ShiyuInstitute of Geophysics,SSB,Beijing ,China.Lateral Inhomogeneity of Basement Layer in Three Gorges Region of Changjiang River (Yangtze River)[J].Earthquake Research in China,1997(4). |
| |
| Authors: | Bian Yinju Hu Hongxiang and Gao ShiyuInstitute of Geophysics SSB Beijing China |
| |
| Institution: | Bian Yinju,Hu Hongxiang,and Gao ShiyuInstitute of Geophysics,SSB,Beijing 100081,China |
| |
| Abstract: | Seismic tomography from the Pg wave data along the non-longitudinal profile in the Three Gorges Region is presented in this paper.The seismic tomography method,and the acquisition and analysis of seismic travel time are broadly outlined.The tomography of basement reveals a great amount of significant information and shows that the low-velocity zone is due to the lithologic difference and the fault fracture zone.It also demonstrates that there exist three high-velocity zones with v>6.4 km/s at the basement; the largest of zones which strikes north-south is located at the southwestern side of Huangling Anticlinorium and extends into the anticlinorium northward.The other two high-velocity zones are,respectively,situated at the eastern side of the anticlinorium and the western side of the profile.The high-velocity zones are inferred to originate from the upwelling of material with high-velocity from deep crust. |
| |
| Keywords: | Three Gorges region seismic tomography basement layer Huangling anti-clinorium |
| 本文献已被 CNKI 等数据库收录！ |
