郯庐断裂带中南段断层形变累积率长期变化特征
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摘要
利用形变累积率方法,对郯庐断裂带中南段及其邻近区域的跨断层短水准观测资料进行了较为全面的分析研究,在分别讨论不同区域断层形变累积率中长期变化特征的基础上,结合地震活动性,探讨了该方法对中强地震判定的背景意义。研究认为,目前郯庐断裂带中南段总体处于应力的缓慢积累阶段,近期中强地震发生的能量积累尚不足,同时,郯庐断裂带中南段主干断裂沿线的各区域与整体的长期变化特征存在明显的差异,具有进一步研究的空间。
Based on the method of deformation accumulation rate,we analyzed the cross-fault observation data of the central-southern section in the Tanlu fault zone and its adjacent areas comprehensively,discussed the respective long-term variation of the fault deformation accumulation rate in different regions,studied the significance of the method for moderate earthquake. It is concluded that the stress of the central-southern section in the Tanlu fault zone is in a slow accumulation stage.Therefore,the energy accumulation for an moderate earthquakes is currently insufficient. Meanwhile,there exist significant differences in long-term variation between the regions along the main faults and the central-southern section as a whole in the Tanlu fault zone,which await further research.
Based on the method of deformation accumulation rate,we analyzed the cross-fault observation data of the central-southern section in the Tanlu fault zone and its adjacent areas comprehensively,discussed the respective long-term variation of the fault deformation accumulation rate in different regions,studied the significance of the method for moderate earthquake. It is concluded that the stress of the central-southern section in the Tanlu fault zone is in a slow accumulation stage.Therefore,the energy accumulation for an moderate earthquakes is currently insufficient. Meanwhile,there exist significant differences in long-term variation between the regions along the main faults and the central-southern section as a whole in the Tanlu fault zone,which await further research.
引文
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[12]孙业君,黄耘,江昊琳,等.郯庐断裂带鲁苏皖段构造应力场及分段特征研究[J].地震,2015,35(3):66-75
[2]焦青,周俊萍.跨断层垂直位移速率的动态演化特征与强震的关系[J].地震,1998,18(3):265-273
[3]葛计划,宁斌,孙军.断层形变异常强度在跨断层水准测量中的应用[J].防灾科技学院学报,2011,13(4):19-24
[4]孙军,葛计划,曹志磊,等.跨断层水准数据处理方法在苏鲁皖地区的应用[J].防灾科技学院学报,2014,16(3):32-37
[5]陈兵,江在森,赵振才.中国西部断层形变趋势异常特征与地震活动关系研究[J].中国地震,2000,16(1):77-85
[6]赵振才,陈兵.青藏块体北缘跨断层测量资料宏观分析[J].中国地震,1996,12(4):358-366
[7]王永安,李琼,刘强.跨断层形变累积率的变化特征与云南地区强震[J].地震研究,2011,34(2):136-142
[8]葛计划,孙军,陈勇,等.合肥台短水准异常与周边地震活动分析[J].防灾科技学院学报, 2011,13(2):38-42
[9]李开洋,王成虎,邢博瑞,等.郯庐断裂带区域应力状态研究综述[J].大地测量与地球动力学,2014,34(6):1-8
[10]李杰,韩海华,闫德桥,等.沂沭断裂带垂直形变与断层活动特征分析[J].大地测量与地球动力学,2002,22(2):106-111
[11]刘东旺,夏瑞良,刘泽民,等.郯庐断裂带安徽段现代地震活动及应力场特征[J].地质科学, 2006,41(2):278-290
[12]孙业君,黄耘,江昊琳,等.郯庐断裂带鲁苏皖段构造应力场及分段特征研究[J].地震,2015,35(3):66-75