Computation of the present-day strain rate field of the qinghai-tibetan plateau and its geodynamic implications
文献类型：期刊论文
| 作者 | Zhu, SB; Cai, YE; Shi, YL |
| 刊名 | Chinese journal of geophysics-chinese edition
 |
| 出版日期 | 2005-09-01 |
| 卷号 | 48期号:5页码:1053-1061 |
| 关键词 | Kriging method Gps nwasurements Strain rate field Qinghai-tibetan plateau |
| ISSN号 | 0001-5733 |
| 通讯作者 | Zhu, sb(zhusb@pku.edu.cn) |
| 英文摘要 | Many researchers have calculated strain rates from the same gps measurement data and obtained different results. in this paper, we introduce the kriging method in geo-statistics to the study of gps velocity field. interpolating the scattered gps velocity data of the qinghai-tibetan plateau and its adjacent areas to grid point values by the kriging method, we calculate the strain rates from these nodal values of all elements similar to derivatives of shape functions(essential lagrange interpolation function) in the finite element algorithm. and obtain the distribution of the strain rate field in the qinghai-tibetan plateau. the results show that the main part of the qinghai-tibetan plateau is in the state of compression in north-south direction, and of extension in the orientation of east-west. on the contrary, in the eastern part of qinghai-tibet, the strain rate behaves compressively in east-west and extension in north-south trending. the orientations of principal strain rates are consistent with those of the p axis and t axis in focal mechanisms. the high values of maximum compressive principal strain rates are located in the himalayan main boundary thrust zone (mbt) and its adjacent regions. the maximum extensional principal strain rate is higher than that of the compressive one in some regions of the interior of the qinghai-tibetan plateau, so the region is in the state of extension. also, the surface dilation strain rate shows that it is in the state of surface compression in the himalayan and its surrounding areas, and it is in the state of surface extension in the interior of the qinghai-tibetan plateau. the distribution of maximum shear strain rates clearly shows the patterns of some main active fault zones. the result of the strain rate in this study suggests that the contemporary tectonic strain of tibet inherits the long term geological deformation. |
| WOS关键词 | CRUSTAL DEFORMATION ; DISTRICT ; MAINLAND |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000232232400011 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2378013 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zhu, SB |
| 作者单位 | 1.China Earthquake Adm, Inst Crustal Dynam, Beijing 100085, Peoples R China 2.Peking Univ, Dept Geophys, Beijing 100871, Peoples R China 3.Chinese Acad Sci, Grad Sch, Key Lab Calculat Geodynam, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, SB,Cai, YE,Shi, YL. Computation of the present-day strain rate field of the qinghai-tibetan plateau and its geodynamic implications[J]. Chinese journal of geophysics-chinese edition,2005,48(5):1053-1061. |
| APA | Zhu, SB,Cai, YE,&Shi, YL.(2005).Computation of the present-day strain rate field of the qinghai-tibetan plateau and its geodynamic implications.Chinese journal of geophysics-chinese edition,48(5),1053-1061. |
| MLA | Zhu, SB,et al."Computation of the present-day strain rate field of the qinghai-tibetan plateau and its geodynamic implications".Chinese journal of geophysics-chinese edition 48.5(2005):1053-1061. |
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来源：中国科学院大学
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