| 昆仑山口西8.1级地震前后地壳垂直运动的负位错模型 |
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| 引用本文： | 张希,张四新,王双绪.昆仑山口西8.1级地震前后地壳垂直运动的负位错模型[J].地震研究,2004,27(2):153-158. |
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| 作者姓名： | 张希 张四新 王双绪 |
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| 作者单位： | 中国地震局第二监测中心,西安,710054;中国地震局第二监测中心,西安,710054;中国地震局第二监测中心,西安,710054 |
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| 基金项目： | 地震科学联合基金“地壳运动的非震负位错模型反演与强震地点预测研究”( 60 3 0 0 1)，中国地震局“十五”重点项目子课题“中国大陆构造变形变化特征和重点地区应变积累状态研究”与“青藏高原北部地区地震活动短期前兆特征及其预测方法研究” |
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| 摘 要： | 利用昆仑山口西8．1级地震震区外围格尔木一五道梁300km长水准测线在1979，1991和2002年3期垂直形变资料，借助研究改进的负位错模型获取发震构造及其相关断裂的运动、变形特征及应力应变积累部位和强度，对与此次大震有关的区域构造形变背景及可能的震后影响进行了研究。结果表明：1991～2002年相对1979～1991年垂直差异运动及应变积累加速增强的特征与昆仑山口西8．1级地震孕育有关；且这样的一个地壳垂直运动加速过程可能还未因地震发生而结束，发震构造相关的断裂构造部位仍有发生较强地震的可能。
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| 关 键 词： | 地壳垂直运动 负位错模型 梯度场 昆仑山口西8.1级地震 |
Negative Dislocation Model for Vertical Crustal Movement before and after MS8.1 Earthquake in the West of Kunlun Mountain Pass |
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| Zhang Xi,Zhang Sixin,Wang Shuangxu.Negative Dislocation Model for Vertical Crustal Movement before and after MS8.1 Earthquake in the West of Kunlun Mountain Pass[J].Journal of Seismological Research,2004,27(2):153-158. |
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| Authors: | Zhang Xi Zhang Sixin Wang Shuangxu |
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| Abstract: | Using the vertical deformation data of the long-leveling survey got respectively in 1979, 1991 and 2002 alongside the 300km-long measuring line which extents from Geermu to Wudaoliang in the outer earthquake area of M S 8 1 earthquake, with the aid of improved negative dislocation model, the following three results are obtained.(1) The motion and deformation of seismogenic fault and the related faults.(2) The location where the stress and strain accumulates.(3) The intensity of the accumulated stress and strain.Further, the regional tectonic deformation background in relation with this earthquake is studied.Then, the following conclusions can be drawn.The vertical crustal movement and strain accumulation in the period from 1991 to 2001 sped up compared with the crustal movement and strain accumulation in the period from 1979 to 1999.This phenomenon is related to the development of M S 8 1 Kunlun Earthquake.And the acceleration process of vertical crustal movement may have not yet finished.So, it is still possible for strong earthquakes to occur on the faults related to the seismogenic structure. |
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| Keywords: | vertical crustal movement negative dislocation model gradient field M S 8 1 Kunlun Earthquake |
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