汶川8.0级地震前龙门山断裂带地倾斜面变化特征研究  

RESEARCH ON SURFACE VARIATION CHARACTERISTICS OF GROUND TILT IN LONGMENSHAN FAULT ZONE BEFORE WENCHUAN Ms8.0 EARTHQUAKE

作　　者：张创军[1] 邵辉成[2] 史春伟[1] 陈嘉选[1] 

机构地区：[1]陕西省地震局乾陵地震台,咸阳713300 [2]陕西省地震局,西安710068

出　　处：《大地测量与地球动力学》2011年第B06期6-9,共4页Journal of Geodesy and Geodynamics

基　　金：中国地震局"南北地震带北段大震危险性强化跟踪研究"课题

摘　　要：探讨汶川8.0级地震前龙门山断裂带区域地倾斜面的形变特征,分析表明震前区域地倾斜面在水平形变变化上呈现由龙门山断裂带两侧向中央挤压特征;垂直形变变化呈现龙门山断裂带西北侧的后山断裂持续抬升隆起,东南侧前山断裂的雅安等区域持续下沉特征;震源附近的汶川区域地倾斜面从2005年下半年至2006年出现了垂直和水平形变显著加速增大的趋势。The deformation characteristic changes of the crustal tilt surface in Longmenshan fault zone betbre Wenchuan Ms8.0 earthquake is discussed. The analysis shows that before the earthquake in the horizontal deformation change tilt surface there appeared the compresional characteristics from the two sides to central part of the fault zone and in the vertical deformation change of the Houshan fault which is on the northwest side of the Longmenshan fault was continuously lifting and the Qianshan fault on the southeast side of the Longmenshan fault subsiding. The Wenchuan area near the seismic focus presented evidently accelerative and inccreasing of the vertical and horizontal deformation characteristics from late 2005 to 2006.

关 键 词：汶川地震 龙门山断裂带 地倾斜 面倾角 面方位角 

分 类 号：P315.725[天文地球—地震学]