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| Characteristics of horizontal crustal move-ment in Weihe basin and adjacent zones by GPS observation | |
| 作者姓名： | 戴王强 任隽 赵小茂 邵辉成 朱桂芝 |
| 作者单位： | Seismological Institute of Lanzhou，Earthquake Administration of Shaanxi Province，Xian 710068，China，Earthquake Administration of Shaanxi Province，Xian 710068，China，Earthquake Administration of Shaanxi Province，Xian 710068，China，Second Center For Crustal Deformation Monitoring，China Earthquake Administration，Xian 710054，China Lanzhou 730000，China，Earthquake Administration of Shaanxi Province，Xian 710068，China |
| 基金项目： | Seismological Science Fundation (104016)of CSB and Seismological Science Foundation of Shaanxi Province (200208). |
| 摘 要： | Introduction GPS observation results provide high-accuracy and large-range crustal movement data with real time, which makes it possible to obtain the velocity field of current crustal movement in Chi-nese mainland within a short time and check the previous tectonic deformation model. Geoscien-tists at home and abroad have made a great number of researches on the crustal movement in Chi-nese mainland and have obtained many results in this field (JIANG, et al, 2001; WANG, et al, 2001; ZHA… |
| 收稿时间： | 20 January 2003 |
| 修稿时间： | 16 September 2003 |
Characteristics of horizontal crustal movement in Weihe basin and adjacent zones by GPS observation |
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| Dai Wang-qiang , Ren Jun , Zhao Xiao-mao , Shao Hui-cheng and Zhu Gui-zhi.Characteristics of horizontal crustal move-ment in Weihe basin and adjacent zones by GPS observation[J].Acta Seismologica Sinica(English Edition),2004,17(3):282-286. | |
| Authors: | Dai Wang-qiang Ren Jun Zhao Xiao-mao Shao Hui-cheng and Zhu Gui-zhi |
| Institution: | 1. Seismological Institute of Lanzhou, Lanzhou 730000, China;Earthquake Administration of Shaanxi Province, Xi'an 710068, China 2. Earthquake Administration of Shaanxi Province, Xi'an 710068, China 3. Second Center For Crustal Deformation Monitoring, China Earthquake Administration, Xi'an 710054, China |
| Abstract: | Based on the GPS data provided by CMONOC during 1999~2002 and observed by Seismological Bureau of Shaanxi Province during 2001~2002, we have obtained the crustal movement velocity field in Weihe basin and adjacent regions. The results show that the motion velocity in Weihe basin and adjacent zones is characterized by distinct NE-directional stripped variation. The south border of Ordos block seems to show an discontinuous anti-clockwise rotation on the whole with an average velocity of about 5.7 mma-1 relative to Yulin site on the Ordos block. There is a left-lateral shear belt on both sides of Binxian-Xi'an-Lantian zone in the central Weihe basin, and its northern area has a better corresponding relationship with the dense zone of small earthquakes in Tong-chuan-Jingyang-Lintong-Weinan. |
| Keywords: | south border of Ordos block Weihe basin crustal movement GPS observation |
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