GPS测定沂沭断裂带两侧块体的相对运动状态
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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 between 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 parameters 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 relationship with seismic situations.
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 between 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 parameters 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 relationship with seismic situations.
引文
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[10]朱成林,贾媛,殷海涛,等.日本9.0级地震后山东及周边地区地壳运动状态分析[J].地震研究,2014,37(2):191-195(Zhu Chenglin,Jia Yuan,Yin Haitao,et al.Analysis on Crustal Movement State of Shandong and Its Adjacent Areas after Japan M9.0Earthquake[J].Journal of Seismological Research,2014,37(2):191-195)
[11]周德敏,甘卫军,任金卫,等.基于GPS观测资料反演庄浪河断裂带、马衔山北缘断裂带的滑动速率[J].地震地质,2005,27(4):706-715(Zhou Demin,Gan Weijun,Ren Jinwei,et al.Inversion of Slip Rates of the Zhuanglanghe Faults and the Northern Marginal Fault of Maxianshan Based on GPS Measurements[J].Seismology and Geology,2005,27(4):706-715)
[2]茂木清夫.巨大地震论[J].数理科学,1976,158:16-23(Shigeki Shio.The Great Earthquake Theory[J].Mathematical Science,1976,158:16-23)
[3]杨少敏,聂兆生,贾志革,等.GPS解算的日本Mw9.0地震的远场同震地表位移[J].武汉大学学报:信息科学版,2011,36(11):1 336-1 339(Yang Shaomin,Nie Zhaosheng,Jia Zhige,et al.Far-Field Coseismic Surface Displacement Caused by the Mw9.0Tohoku Earthquake[J].Geomatics and Information Science of Wuhan University,2011,36(11):1 336-1 339)
[4]殷海涛,甘卫军,黄蓓,等.日本M9.0巨震对山东地区地壳活动的影响研究[J].地球物理学报,2013,56(5):1 497-1 505(Yin Haitao,Gan Weijun,Huang Bei,et al.Study on the Effects of Japan M9.0Huge Earthquake on the Crustal Movement of Shandong Area[J].Chinese Journal of Geophysics,2013,56(5):1 497-1 505)
[5]王敏,沈正康,牛之俊,等.现今中国大陆地壳运动与活动块体模型[J].中国科学:D辑,2003,33(增刊):65-81(Wang Min,Shen Zhengkang,Niu Zhijun,et al.Present-Day Crustal Movement and Active Block Model of Chinese Mainland[J].Science in China:Series D,2003,33(Supp):65-81)
[6]殷海涛,王强,朱成林,等.山东及周边地块间近期运动状态分析[J].大地测量与地球动力学,2011,31(4):37-41(Yin Haitao,Wang Qiang,Zhu Chenglin,et al.Analysis of Present Movement State of Shandong and Surrounding Blocks[J].Journal of Geodesy and Geodynamics,2011,31(4):37-41)
[7]刘晓霞,江在森,武艳强.利用GPS资料研究郯庐带现今运动及变形状态[J].地震,2012,32(4):1-10(Liu Xiaoxia,Jiang Zaisen,Wu Yanqiang.Motion and Deformation State of the Tancheng-Lujiang Fault Zone Derived from GPS Data[J].Earthquake,2012,32(4):1-10)
[8]李延兴,李智,张静华,等.中国大陆及周边地区的水平应变场[J].地球物理学报,2004,47(2):222-231(Li Yanxing,Li Zhi,Zhang Jinghua,et al.Horizontal Strain Field in the Mainland and Its Surrounding Areas[J].Chinese Journal of Geophysics,2004,47(2):222-231)
[9]肖根如,甘卫军,陈为涛,等.青藏高原班公-怒江缝合带现今运动状况的GPS观测研究[J].吉林大学学报:地球科学版,2010,40(6):1 496-1 502(Xiao Genru,Gan Weijun,Chen Weitao,et al.Present-Day Movement of Bangong CoNujiang Suture Zone,Tibetan Plateau,Inferred from GPS Measurements[J].Journal of Jilin University:Earth Science Edition,2010,40(6):1 496-1 502)
[10]朱成林,贾媛,殷海涛,等.日本9.0级地震后山东及周边地区地壳运动状态分析[J].地震研究,2014,37(2):191-195(Zhu Chenglin,Jia Yuan,Yin Haitao,et al.Analysis on Crustal Movement State of Shandong and Its Adjacent Areas after Japan M9.0Earthquake[J].Journal of Seismological Research,2014,37(2):191-195)
[11]周德敏,甘卫军,任金卫,等.基于GPS观测资料反演庄浪河断裂带、马衔山北缘断裂带的滑动速率[J].地震地质,2005,27(4):706-715(Zhou Demin,Gan Weijun,Ren Jinwei,et al.Inversion of Slip Rates of the Zhuanglanghe Faults and the Northern Marginal Fault of Maxianshan Based on GPS Measurements[J].Seismology and Geology,2005,27(4):706-715)