基于GPS的陕西地壳水平运动规律研究
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摘要
目的为研究陕西地区地壳的变形规律积累经验,可为今后地震的监测、预报及关中地区的城市规划和建设提供参考。方法根据陕西地区地壳形变的GPS观测资料,利用GIS技术的空间分析功能,采用不同的参考基准,探讨汶川地震对陕西地区地壳水平运动影响。结果得出了地震前后陕西地区地壳水平运动的规律与特征,即在2001—2008年期间,相对于稳定的欧亚板块,陕西地区整体以南东向运动为主,且关中盆地东西两端运动速率稍大一些。相对于D508(榆林站点)而言,陕西地区整体以东南向运动为主,虽然大部分站点差异运动不明显,但关中盆地中部和东部运动速率稍大一些。结论汶川地震使得陕西地壳整体向北旋转,从南东运动为主转向以东南运动为主,对关中西部的影响明显大于东部,而且关中盆地及其两侧向东运动的速率与往年相比也有明显增大。
Aim To study the crustal deformation rules of Shaanxi Province,and provide some references to earthquake monitoring and prediction,urban planning and construction of Guanzhong area.Methods In order to examine the influence of Wenchuan Earthquake on the horizontal crustal movement of Shaanxi province,GPS data measured about crust movement were wsed as data source,spatial analysis function of GIS was applied by different reference standard.Results Obtained Shaanxi horizonal crustal movement before and after earthquake,that is in the period of zool to 2008,Eurasian plate is retatively stable,Shaanxi ratated to north on the whole,and Gnanzhong Basin moved more quickly at east and weast ends compare to D508(Yulin site) the movement of shaanxi region towards to sowth-east the central and east parts in Guanzhong Basin move slightly faster though most site differ slightly in movement.Conclusion The impact on the west of Guanzhong area is larger than that on the east.The rate of the movement of Guanzhong Basin and its two sides,compared with previous years,increased obviously.
Aim To study the crustal deformation rules of Shaanxi Province,and provide some references to earthquake monitoring and prediction,urban planning and construction of Guanzhong area.Methods In order to examine the influence of Wenchuan Earthquake on the horizontal crustal movement of Shaanxi province,GPS data measured about crust movement were wsed as data source,spatial analysis function of GIS was applied by different reference standard.Results Obtained Shaanxi horizonal crustal movement before and after earthquake,that is in the period of zool to 2008,Eurasian plate is retatively stable,Shaanxi ratated to north on the whole,and Gnanzhong Basin moved more quickly at east and weast ends compare to D508(Yulin site) the movement of shaanxi region towards to sowth-east the central and east parts in Guanzhong Basin move slightly faster though most site differ slightly in movement.Conclusion The impact on the west of Guanzhong area is larger than that on the east.The rate of the movement of Guanzhong Basin and its two sides,compared with previous years,increased obviously.
引文
[1]LI Tian-wen,CHEN Jian-bing.An Inverse Analysis of theComprehensive Medium Parameters and a Simulation ofthe Crustal Deformation of Qinghai-Tibet Plateau[J].Ac-ta Geologica Sinica,2004,78(6):150-157.
[2]李天文,梁伟锋,冯丽丽,等.基于GPS的青藏块体东北缘近期地壳水平运动与变形研究[J].干旱区地理,2007,30(5):637-645.
[3]李天文,陈靖,胡斌.基于ArcGIS地面沉降三维可视化显示与分析——以陕西省关中地区为例[M].山地学报,2008,26(4):467-472.
[4]马锋,杨发俊,陈润桥,等.天津市地下水开采对地面沉降影响的多元回归分析[J].中国地质灾害与防治学报,2008,19(2):63-65.
[5]邢西淳,邵辉成,李炳乾,等.陕甘宁青地区的地形变化特征与强震活动[J].大地测量与地球动力学,2003,23(4):80-87.
[6]石军.汶川8.0级地震前后陕西地震活动的变化[J].灾害学,2008,23(9):107-110.
[2]李天文,梁伟锋,冯丽丽,等.基于GPS的青藏块体东北缘近期地壳水平运动与变形研究[J].干旱区地理,2007,30(5):637-645.
[3]李天文,陈靖,胡斌.基于ArcGIS地面沉降三维可视化显示与分析——以陕西省关中地区为例[M].山地学报,2008,26(4):467-472.
[4]马锋,杨发俊,陈润桥,等.天津市地下水开采对地面沉降影响的多元回归分析[J].中国地质灾害与防治学报,2008,19(2):63-65.
[5]邢西淳,邵辉成,李炳乾,等.陕甘宁青地区的地形变化特征与强震活动[J].大地测量与地球动力学,2003,23(4):80-87.
[6]石军.汶川8.0级地震前后陕西地震活动的变化[J].灾害学,2008,23(9):107-110.
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