Features of Current Horizontal Movement Observed by GPS and Influence of the Great Wenchuan Earthquake in the Northeastern margin of Qinghai-Tibet Block
详细信息
- 责任者：Zhang Xi (The Second Monitoring and Application Center of CEA ; Xi’an 710054 ; China) ; Zhang Xiaoliang
- 刊名：Journal of Seismological Research
- 出版年：2010
- 卷期：33(4)
- 关键词：水平运动 ; horizontal movement ; 汶川地震2008 ; Wenchuan earthquake 2008 ; 青藏高原 ; Qinghai-Tibetan Plateau
- 页码：p.265-268
- 图表：4 illus., 12 refs.
- 分类号：0300
- issnNo：ISSN1000-0666
- isbnNo：CN53-1062/P
摘要
Using the GPS observational data during the period of 2004～2007 and 2007～2009 in the northeastern margin of Qinghai-Tibet block,the evolution features of crustal movement and tectonic deformation of active fractures are analyzed,together with the influence of the Wenchuan Earthquake.The result shows that,this earthquake did not display remarkable effect on the Qilianshan-Haiyuan fracture belt from observation result of limit stations,which still reflected thrust and sinistral slip, according to its tectonic background;but displayed relatively obvious influence on the West Qinling tectonic region,the medium-southern segments of Liupanshan fault,the west segments of Northern foot fault of Qinling and Weihe fault,mainly revealing enganced strain accumulation on the middle-eastern West Qinling tectonic region,mainly revealing adjusting-distrubing effect on other fault-segments.
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