西南天山地区的地震重定位与活动性分析
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
利用双差地震定位方法对西南天山地区24个台站记录到的864个地震的P波绝对到时数据和相对到时数据进行了地震重新定位,并给出了522个地震的震源参数.重定位后的地震定位精度均有了显著提高.重新定位后,本研究区域内地震活动密集成东西向与北西向线性排列分布,与已知活动断裂呈更加清晰的联系.
We presented the relocated hypocenter parameters for 522 events of 864 earthquakes which occurred in the southwest Tienshan region. The double-difference (DD) relocating method was utilized to produce the pronounced relative event locations through adopting both the absolute and relative P-wave arrival times. The resolution of the relocated earthquake hypocenters was significantly increased. After the relocation, those formerly randomly-distributed earthquakes were clustered and aligned tending to the east-west and north-west directions. The revised hypocenter locations showed some relations with the known major active faults.
引文
[1]丁国瑜,卢演铸.对我国现今板内运动状态的初步探讨[J].科学通报,1986,31(18):1412-1415.
    [2]Molnar P,Tapponnier P.Cenozoic tectonics of Asia:Effects of continental collision[J].Science,1975,189:419-426.
    [3]Lei J S,Zhao D P.Teleseismic P-wave tomography and the upper mantle structure of the central Tien Shan orogenic belt[J].Physics of the Earth and Planetary Interiors.2007,162:165-185.
    [4]Roecker S,Sabitova T,Vinnik L,et al.Three-dimensional elastic wave velocity structure of the Western and Central Tien Shan[J].J Geophys Res,1993,98:15779-15795.
    [5]Wolfe C,Vernon F.Shear-wave splitting at central Tien Shan:evidence for rapid variation of anisotropic patterns[J].Geophys Res Lett,1998,25:1217-1220.
    [6]Waldhauser F,Ellsworth W.A double-difference earthquake location algorithm:method and application to the northern Hayward fault,California[J].Bull Seism Soc Am,2000,90(6):1353-1368.
    [7]Waldhauser F,Ellsworth W.Fault structure and mechanics of the California,from double-difference earthquake locations[J].J Geophys Res,2002,107(B3):ESE3-1-3-14.
    [8]Zhang G M,Wang S Y,Li L,et al.Focal depth research of earthquakes in Mainland China:Implication for tectonics[J].Chinese Science Bulletin(Englsish edition),2002,47(12):969-974(in Chinese).张国民,汪素云,李丽,等.中国大陆地震震源深度及其构造含义[J].科学通报,2002,47(9):663-668.
    [9]Engdahl R,Van der Hilst R,Buland R.Global teleseismic earthquake relocation with improved travel times and procedures for depth determination[J].Bull Seismol Soc Am,1998,88:722-743.
    [10]Vinnik L,Reigber C,Aleshin I,et al.Receiver function tomography of the central Tien Shan[J].Earth Planet Sci Lett,2004,225:131-146.
    [11]马杏垣.中国岩石圈动力学地图集[M].北京:中国地图出版社,1989.
    [12]Lei J S,Zhou HL,Zhao D P.3D velocity structures of P wave in the crust and upper mantle beneath the Pamir and adjacent region[J].Chinese J Geophys,2002,45(6):802-811(in Chinese).雷建设,周蕙兰,赵大鹏.帕米尔及邻区地壳上地幔P波三维速度结构的研究.地球物理学报,2002,45(6):802-812.
    [13]Wang Q,Ding G Y,Qiao X J,et al.Research on present crustal deformation in the southern Tianshan(Jiashi),China by GPS geodesy[J].Acta Seismologica Sinica,2000,22(3):263-270(in Chinese).王琪,丁国瑜,乔学军,等.用GPS研究南天山(伽师)地区现今地壳变形[J].地震学报,2000,22(3):263-270.
    [14]Wu C Z,Jiao L X,Wang Q S,et al.A study of the gravity field and crustal structure of the Pamir Surroundings and adjacent regions[J].Chinese J Geophys(Acta Geophysica Sinica),1993,36(5):633-642(in Chinese).武传真,焦灵秀,王谦身,等.帕米尔及其周围地区的重力场特征与地壳构造研究[J].地球物理学报,1993,36(5):633-642.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心