基于GPS的关中地区地壳水平运动研究
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摘要
以"中国地壳运动观测网络"观测数据以及陕西省GPS观测网2001-2005年的5期观测数据为基础,应用GAM IT/GLOBK软件对数据进行精密解算,获得了陕西省关中地区2001~2005年相对于鄂尔多斯块体以及关中地区内部彬县站点的水平运动速度场。并结合板块构造学原理进一步分析了关中及其邻区的地壳运动规律:①GPS技术用于地壳运动的监测是可行的;②相对于较稳定的鄂尔多斯块体,关中地区整体呈现不连续性逆时针旋转;③关中地区中西部存在多处应力集中区,地壳的相对水平运动较为激烈;④关中地区中部泾灞隐伏断裂带附近地壳水平运动激烈,属潜在多震区。
Based on the GPS data of China Crust Movement Observation Network and Shaanxi GPS Observation Network during 2001-2005,using the software of GAMIT/GLOBK to process data exactly,the horizontal movement rate-field in Shaanxi Guanzhong Area is obtained,which is relative to the stable Ordos Block and Binxian Point from 2001 to 2005.Combining with the plate tectonic theory,the main conclusions can be elicited as follow: ①It is feasible to use GPS technology to take the inspection of crustal movement;②Relative to the stable Ordos Block,Guanzhong Area shows its discontinuous anticlockwise rotation;③There are a few of stress concentration areas in the middle and west of Guanzhong Area,and the relatively crustal horizontal movement is strong;④The area near Jing-Bar Hidden Faulted Zone,which is in the middle of Guanzhong Area,is a potential multiple earthquake region,where the relatively crustal horizontal movement is quite strong.
Based on the GPS data of China Crust Movement Observation Network and Shaanxi GPS Observation Network during 2001-2005,using the software of GAMIT/GLOBK to process data exactly,the horizontal movement rate-field in Shaanxi Guanzhong Area is obtained,which is relative to the stable Ordos Block and Binxian Point from 2001 to 2005.Combining with the plate tectonic theory,the main conclusions can be elicited as follow: ①It is feasible to use GPS technology to take the inspection of crustal movement;②Relative to the stable Ordos Block,Guanzhong Area shows its discontinuous anticlockwise rotation;③There are a few of stress concentration areas in the middle and west of Guanzhong Area,and the relatively crustal horizontal movement is strong;④The area near Jing-Bar Hidden Faulted Zone,which is in the middle of Guanzhong Area,is a potential multiple earthquake region,where the relatively crustal horizontal movement is quite strong.
引文
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[12]严学文,等.基于GPS的关中地区现今地壳水平运动特征分析[J].测绘科学,2008,33(4)
[13]陕西地震信息网.陕西及周边地区2005年之前测震数据共享系统[EB/OL].http://www.http://www.eqsn.gov.cn/dizhshj/dzml.aspx.
[2]顾国华,牛红叶,郑贵明.中国大陆1998~1999年地壳运动观测结果[J].地震学报,2000,22(6).
[3]李天文,梁伟锋,李军锋,等.基于GPS的青藏块体东北缘现今地壳水平运动研究[J].山地学报,2005,23(3):260-266.
[4]李天文,梁伟锋,冯丽丽.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.
[5]崔笃信,王庆良,等.用GPS监测西安市南郊地壳形变[J].大地测量与地球动力学,2003,23(2).
[6]祝意青,王庆良,田勤俭,等.关中地区地壳形变综合分析与研究[J].大地测量与地球动力学,2006,26(4):56-62.
[7]赵小茂,李永辉,戴王强.2001_2004年陕西关中地区地壳运动及应变分析[J].地震地磁观测与研究,2005,26(3):41-45.
[8]张培震,王琪,马宗晋.中国大陆现今构造变形GPS观测数据与速度场[J].地学前缘,2002,9(2):415-429.
[9]王琪,张培震,FREYMUELL ERJT.等.中国大陆现今地壳运动和构造变形[J].中国科学(D辑),2001,31(7).
[10]王景明.渭河盆地活动构造与地震[J].地壳形变与地震,1983,3(4):59-66.
[11]彭建兵.渭河断裂带的构造演化与地震活动[J].地震地质,1992,14(2):113-119.
[12]严学文,等.基于GPS的关中地区现今地壳水平运动特征分析[J].测绘科学,2008,33(4)
[13]陕西地震信息网.陕西及周边地区2005年之前测震数据共享系统[EB/OL].http://www.http://www.eqsn.gov.cn/dizhshj/dzml.aspx.
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