安宁河-则木河断裂带断层活动特征及其与地震活动的关系
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摘要
利用安宁河-则木河断裂带上的跨断层流动形变资料,计算了断层活动累积量,定量研究了断层在不同时间段内的活动特征,然后采用断层活动总体状态参量R(t)值对断层总体活动特征进行了综合分析,探讨了其与地震活动的关系。结果表明:安宁河-则木河断裂带在观测期内以左旋走滑活动为主,兼具逆冲活动;断层总体活动状态参量R(t)显示,断层整体活动的不稳定性与强震有关,断层活动不稳定时,地震活动也较强烈。
By using the observation data of fault-crossing mobile sites in Anninghe-Zemuhe fault, we calculated the cumulative amount of vertical lifts, analyzed the current faulting characteristics in different time quantitatively, and then used R(t) to describe the overall faults activity level quantitatively. Our results show that AnningheZemuhe fault is left-lateral strike slip with thrusting activity; integrated parameter R(t) of fault activity show that instability of the overall faults activity has a relatively close relationship with the occurrence of strong earthquakes, and when the fault activity is unstable, seismic activity is more intense than before.
By using the observation data of fault-crossing mobile sites in Anninghe-Zemuhe fault, we calculated the cumulative amount of vertical lifts, analyzed the current faulting characteristics in different time quantitatively, and then used R(t) to describe the overall faults activity level quantitatively. Our results show that AnningheZemuhe fault is left-lateral strike slip with thrusting activity; integrated parameter R(t) of fault activity show that instability of the overall faults activity has a relatively close relationship with the occurrence of strong earthquakes, and when the fault activity is unstable, seismic activity is more intense than before.
引文
薄万举,谢觉民等,1998.八宝山断裂带形变分析与探讨.地震,18(1);63—68.
曹建玲,张晶等,2011.首都圈跨断层形变反映的断层活动方式及其成因探讨.地震,31(4):77—85.
程建武,郭桂红等,2010.安宁河断裂带晚第四纪活动的基本特征及强震危险性分析.地震研究,33(3):265 —272.
程佳,刘杰等,2011.川滇菱形块体东边界各断层段强震演化特征研究.中国科学:地球科学,41(9):1311—1326.
杜方,龙德雄等,2011.川滇交界东部地区汤家坪跨断层形变异常调查.四川地震,(4):8—12.
杜平山,2000.则木河断裂带的走滑位移及滑动速率.四川地震,(1-2):50—64.
焦青,周俊萍,1998.跨断层垂直位移速率的动态演化特征与强震的关系.地震,18(3):265—273.
李腊月,邢成起等,2013.用主成分分析方法综合分析首都圈跨断层形变资料.中国地震,29(2):246—255.龙
思胜,陈银,2003.安宁河-则木河断裂带近期7次地震的震源机制解.四川地震,(2):21—25.
苏琴,杨永林等,2012.则木河断裂带断层活动特征与中强震关系浅析.地震研究,35(1):18—23.
王林瑛,陈学忠等,2006.地震活动性总体参量R(t)及其在地震预测中应用的研究.地震,26(2):54 —60.
闻学泽,2000.四川西部鲜水河-安宁河-则木河断裂带的地震破裂分段特征.地震地质,22(3):239 —249.
魏文新,江在森等,2012.利用GPS数据研究川滇块体东边界主要断裂带运动学特性.武汉大学学报信息科学版,37(9):1041—1044.
张培震,2008.青藏高原东缘川西地区的现今构造变形、应变分配与深部动力过程.中国科学(D辑),38(9):1041—1056.
张希,唐红涛等,2013.跨断层形变的慢时变结构分析与异常识别初探.武汉大学学报信息科学版,38(6):710 —715.
Wen X.Z.,Ma S.L.et al.,2008.Historical pattern and behavior of earthquake ruptures along the eastern boundary of the Sichuan Yunan faulted-block,southwestern China.Phys.Earth Planet Int.,168:16—36.
曹建玲,张晶等,2011.首都圈跨断层形变反映的断层活动方式及其成因探讨.地震,31(4):77—85.
程建武,郭桂红等,2010.安宁河断裂带晚第四纪活动的基本特征及强震危险性分析.地震研究,33(3):265 —272.
程佳,刘杰等,2011.川滇菱形块体东边界各断层段强震演化特征研究.中国科学:地球科学,41(9):1311—1326.
杜方,龙德雄等,2011.川滇交界东部地区汤家坪跨断层形变异常调查.四川地震,(4):8—12.
杜平山,2000.则木河断裂带的走滑位移及滑动速率.四川地震,(1-2):50—64.
焦青,周俊萍,1998.跨断层垂直位移速率的动态演化特征与强震的关系.地震,18(3):265—273.
李腊月,邢成起等,2013.用主成分分析方法综合分析首都圈跨断层形变资料.中国地震,29(2):246—255.龙
思胜,陈银,2003.安宁河-则木河断裂带近期7次地震的震源机制解.四川地震,(2):21—25.
苏琴,杨永林等,2012.则木河断裂带断层活动特征与中强震关系浅析.地震研究,35(1):18—23.
王林瑛,陈学忠等,2006.地震活动性总体参量R(t)及其在地震预测中应用的研究.地震,26(2):54 —60.
闻学泽,2000.四川西部鲜水河-安宁河-则木河断裂带的地震破裂分段特征.地震地质,22(3):239 —249.
魏文新,江在森等,2012.利用GPS数据研究川滇块体东边界主要断裂带运动学特性.武汉大学学报信息科学版,37(9):1041—1044.
张培震,2008.青藏高原东缘川西地区的现今构造变形、应变分配与深部动力过程.中国科学(D辑),38(9):1041—1056.
张希,唐红涛等,2013.跨断层形变的慢时变结构分析与异常识别初探.武汉大学学报信息科学版,38(6):710 —715.
Wen X.Z.,Ma S.L.et al.,2008.Historical pattern and behavior of earthquake ruptures along the eastern boundary of the Sichuan Yunan faulted-block,southwestern China.Phys.Earth Planet Int.,168:16—36.