基于“中国大陆构造环境监测网络”的天山及邻近地区地壳运动与地震活动的初步研究
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摘要
利用"中国大陆构造环境监测网络"新疆地区的基本站、区域站观测成果对天山及邻近地区现代地壳运动进行了研究,获得了天山地壳运动速率,提出了天山地壳缩短由南向北、由西向东逐渐递减的规律。通过GPS复测资料进行区域水平运动状态的分析,通过剪应变,面膨胀值的分布,可以发现挤压、隆升、拉张、沉陷过程中产生了正负转换的地带,在这些正负交界并且剪应变值增大的地区,一般都是地震多发区。
Using observation results of crustal movement observation network of China in Xingjian,recent crustal movement of Tianshan and its adjacent area were studied in this paper.They obtained average deformation rate of Tianshan and put forward decline law of Tianshan crustal from north to south,west to east.Through analyzing regional crustal horizontal movement with GPS repetition measurement and shear strain、surface expansion distribution,they found positive and negative conversion zone in the extrusion uplift of extensional subsidence process and earthquakes usually occurred in such area with increasing shear strain.
Using observation results of crustal movement observation network of China in Xingjian,recent crustal movement of Tianshan and its adjacent area were studied in this paper.They obtained average deformation rate of Tianshan and put forward decline law of Tianshan crustal from north to south,west to east.Through analyzing regional crustal horizontal movement with GPS repetition measurement and shear strain、surface expansion distribution,they found positive and negative conversion zone in the extrusion uplift of extensional subsidence process and earthquakes usually occurred in such area with increasing shear strain.
引文
[1]王琪,丁国瑜,乔学军,等.天山现今地壳快速缩短与南北地块的相对运动[J].科学通报,2000,45(14):1543-1547.
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[5]李杰,王晓强,谭凯,等.北天山现今活动构造的运动特征[J].大地测量与地球动学,2010,30(6):1-5.
[6]李杰,王晓强,方伟,等,应用GPS技术反演乌鲁木齐地区构造块体运动变形特征[J].内陆地震,2006,20(2):143-148.
[7]Alexander V.Zubovich,Wang Xiaoqiang,Yuri G.Scherba.GPS velocity field for the Tien Shan and surrounding regions[J].TECTONICS,2010,29:TC6014,doi:10.1029/2010TC002772.
[8]YANG ShaoMin,LI Jie,WANG Qi.The deformation pattern and fault rate in the Tianshan Mountains inferred from GPS obser-vations[J]Science in China Series D:Earth Sciences Aug.2008,51(8):1 064-1 080.
[9]江在森,马宗晋,牛安福,等,GPS技术应用于中国地壳运动研究的方法及初步结果[J].地学前缘,10(1):71-79.
[10]王晓强.基于GPS技术研究新疆巴楚—伽师6.8级地震的地壳形变特征[J].地震研究,21(2):175-181.
[2]王晓强,李杰,王琪,等.天山现今地壳运动的形变场分析[J].大地测量与地球动力学,2005,25(3):63-68.
[3]王晓强,李杰,王琪,等.利用GPS形变资料研究天山及邻近地区地壳水平位移与应变特征[J].地震学报,2007,29(1):31-37.
[4]李杰,方伟,朱治国,等.中部天山地壳活动的GPS初步分析[J].内陆地震,2006,20(3):239-244.
[5]李杰,王晓强,谭凯,等.北天山现今活动构造的运动特征[J].大地测量与地球动学,2010,30(6):1-5.
[6]李杰,王晓强,方伟,等,应用GPS技术反演乌鲁木齐地区构造块体运动变形特征[J].内陆地震,2006,20(2):143-148.
[7]Alexander V.Zubovich,Wang Xiaoqiang,Yuri G.Scherba.GPS velocity field for the Tien Shan and surrounding regions[J].TECTONICS,2010,29:TC6014,doi:10.1029/2010TC002772.
[8]YANG ShaoMin,LI Jie,WANG Qi.The deformation pattern and fault rate in the Tianshan Mountains inferred from GPS obser-vations[J]Science in China Series D:Earth Sciences Aug.2008,51(8):1 064-1 080.
[9]江在森,马宗晋,牛安福,等,GPS技术应用于中国地壳运动研究的方法及初步结果[J].地学前缘,10(1):71-79.
[10]王晓强.基于GPS技术研究新疆巴楚—伽师6.8级地震的地壳形变特征[J].地震研究,21(2):175-181.
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