| 2-D velocity images of upper crust in Tianshui area, Gansu Province | |
| Cao Ling-Min1; Lai Xiao-Ling2; Cao, LM (reprint author), Chinese Acad Sci, Inst Oceanol, Marine Geol & Environm Key Lab, Qingdao 266071, Peoples R China. | |
| 2012-10-01 | |
| 发表期刊 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| ISSN | 0001-5733 |
| 卷号 | 55期号:10页码:3318-3326 |
| 文章类型 | Article |
| 摘要 | We used the Pg-wave arrival times from high-resolution active-source seismic sounding to carry out the tomographic job on the northeastern margin of Qinghai-Tibet plateau, that is, the Tianshui-Wudu area in West Qinling, with finite difference forward and least squares inversing algorithm with irregular meshes. The results indicate that the study area has rich and complex fractures, such as the fluctuant basement and the steep faults mostly extending to great depths and cutting through the basement. The low-velocity zone between Lixian and Xihe reflects the existence of Xi-Li sedimentary basin, the basement of which is about 5 km deep. The pronounced changing of the velocity contour on the east of Wushan is consistent with the fold region nearby. The Chengxian basin has a relatively high and gently changing velocity, the basement depth of which is less than 3 km. Near Lixian there is a near north- south fault, and a low-velocity zone exists beneath about 5 km depth in the tomographic profile, which may be the upwelling channel of the deep mantle substance in the Tibetan Plateau. |
| 关键词 | North-south Tectonic Belt Qinling Orogenic Belt Seismic Exploration Finite-difference Tomography |
| 学科领域 | Geochemistry & Geophysics |
| DOI | 10.6038/j.issn.0001-5733.2012.10.014 |
| URL | 查看原文 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000310817000014 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/12488 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Cao, LM (reprint author), Chinese Acad Sci, Inst Oceanol, Marine Geol & Environm Key Lab, Qingdao 266071, Peoples R China. |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Marine Geol & Environm Key Lab, Qingdao 266071, Peoples R China 2.China Earthquake Adm, Geophys Explorat Ctr, Zhengzhou 450002, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Cao Ling-Min,Lai Xiao-Ling,Cao, LM . 2-D velocity images of upper crust in Tianshui area, Gansu Province[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2012,55(10):3318-3326. |
| APA | Cao Ling-Min,Lai Xiao-Ling,&Cao, LM .(2012).2-D velocity images of upper crust in Tianshui area, Gansu Province.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,55(10),3318-3326. |
| MLA | Cao Ling-Min,et al."2-D velocity images of upper crust in Tianshui area, Gansu Province".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 55.10(2012):3318-3326. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| 2-D velocity images （1812KB） | 限制开放 | 使用许可 | 浏览 | |||
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