GPS测定沂沭断裂带两侧块体的相对运动状态  

Measuring the Relative Motion State Between the Two Sides' Blocks of Yishu Fault Zone by GPS

作　　者：朱成林[1,2] 甘卫军[1] 贾媛[2] 殷海涛[2] 李杰[2] 孔向阳[2] 

机构地区：[1]中国地震局地质研究所地震动力学国家重点实验室,北京市100029 [2]山东省地震局,济南市250014

出　　处：《大地测量与地球动力学》2016年第1期57-61,共5页Journal of Geodesy and Geodynamics

基　　金：山东省地震局重点科研项目(JJ1502Y);中国地震局地震科技星火计划(XH14057)~~

摘　　要：利用剖面分析方法给出沂沭断裂带两侧块体GPS连续观测站点的速率分布,利用块体模型提取沂沭断裂带两侧块体的刚性运动速率并估计误差,利用滑动方式给出两侧块体相对运动的演化过程。结果表明:1)2011年以来沂沭断裂带两侧区域表现为挤压右走滑状态;2)沂沭断裂带两侧块体的相对运动在2013年底出现一个高值变化;3)对比3种块体模型(RRM、REHSM和RELSM),考虑到站点个数及模型参数对模型误差的影响,认为REHSM模型较为适合沂沭断裂带两侧块体相对运动状态的跟踪分析。上述方法和结论可以为研究沂沭断裂带区域地壳运动状态及其与地震形势之间的关系提供依据和参考。The rate distribution of GPS continuous observation sites on the two sides ; blocks of Yishu fault zone is given by cross-section analysis; therigid motion rate of the blocks is extracted by block models and their errors are estimated at the same time; and the evolution process of the relative motion between the two sides; blocks is given by sliding the block model. The results indicate. 1） the area of Yishu fault zone shows a motion state of extrusion and right strike-slip characteristics; 2） the measurement of the relative motion be- tween the two sides; blocks is in a high value change at the end of 2013;3） after comparing three kinds of block models （RRM, REHSM and RELSM）, considering the effects of a number of sites and model parame- ters on the model error, we infer that REHSM model is more suitable for subsequent analysis of the relative motion between the two sides; blocks of Yishu fault zone. The method and conclusion above can provide the basis and reference for the study of the state of regional crustal movement in the Yishu fault zone and its rela- tionship with seismic situations.

关 键 词：沂沭断裂带 剖面分析 块体模型 地震形势 

分 类 号：P315[天文地球—地震学]