龙陵-瑞丽断裂北段晚第四纪活动性特征及强震复发间隔
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
野外地质地貌调查表明,龙陵-瑞丽断裂(南支)北段是以左旋走滑为主兼具一定正断分量的区域性活动断裂。断裂晚更新世以来的平均水平滑动速率为2.2mm/a,平均垂直滑动速率为0.6mm/a;全新世以来的平均水平滑动速率为1.8—3.0mm/a,平均垂直滑动速率为0.5mm/a。断裂在晚更新世以来的滑动速率在不同的时间尺度上变化不大,反映出该断裂晚更新世以来的活动强度比较稳定。利用Poisson模型、Lognormal模型、BPT模型三种概率模型计算获得未来50a强震发震概率分别是:6.32%、0.08%、0.05%;三种模型分别取权重0.28、0.36、0.36,获得龙陵-瑞丽断裂北段未来50a特征地震发震概率为1.82%。
The field investigation and interpretation of remote images indicate that the last activity along the northern segment of Longling-Ruili fault occurred in the Holocene with a strike-slip rate of 2.2-2.5 mm/a and vertical slip rate of 0.6mm/a since late Pleistocene epoch,and strike-slip rate of 1.8-3.0 mm/a and vertical slip rate of 0.5mm/a during the Holocene epoch.The occurrence probability of strong earthquakes in 50 years is calculated as 6.32% by Poisson model,0.08% by Lognormal model and 0.05% by BPT model respectively.Finally,the probability of occurrence of characteristic earthquakes for north section of Longling-Ruili fault is estimated as 1.82% with the weight of 0.28,0.36 and 0.36 for Poisson model,Lognormal model and BPT model.
引文
陈立德,赵维城.1979.1976年龙陵地震.北京:地震出版社.
    虢顺民,向宏发,周瑞奇等,1999a.滇西南龙陵-澜沧断裂带:大陆地壳上一条新生的破裂带.科学通报,44(19):2118—2121.
    虢顺民,向宏发,徐锡伟等,1999b.滇西南大盈江断裂带第四纪活动初步研究.活动断层研究,(7):58—65.
    虢顺民,向宏发,徐锡伟等,2000.滇西南龙陵-澜沧第四纪新生代断裂带特征和形成机制研究.地震地质,22(3):277—284.
    虢顺民,徐锡伟,向宏发等,2002.龙陵-澜沧新生破裂带地震破裂分段与地震预测研究.地震地质,24(2):133—144.
    阚荣举,张四昌,晏凤桐等,1977.我国西南地区现代构造应力场与现代构造活动特征的探讨.地球物理学报,24(2):96—110.
    阚荣举,王绍晋,黄琨等,1983.中国西南地区现代构造应力场与板内断块相对运动.地震地质,5(2):79—90.
    苏有锦,秦嘉政,2001.川滇地区强震活动与区域新构造运动的关系.中国地震,17(1):24—34.
    王晋南,王洋龙,安晓文等,2006.1976年龙陵地震区断裂活动性研究.地震研究,29(4):366—372.
    王阎昭,王恩宁,沈正康等,2008.基于GPS资料约束反演川滇地区主要断裂现今活动速率.中国科学(D辑):地球科学,38(5):582—597.
    闻学泽,1990.鲜水河断裂带未来三十年内地震复发的条件概率.中国地震,6(4):8—16.
    向宏发,徐锡伟,虢顺民等,1999.滇西地区两组交叉型活动断裂及其地震地质意义.活动断裂研究,(7):81—87.
    向宏发,虢顺民,徐锡伟等,2000.川滇南部地区活动地块划分与现今运动特征初析.地震地质,22(3):253—264.
    谢富仁,苏刚,崔晓锋等,2001.滇西南地区现代构造应力场分析.地震学报,23(1):17—23.
    张培震,李传友,毛凤英,2008.河流阶地演化与走滑断裂滑动速率.地震地质,30(1):44—57.
    周瑞奇,虢顺民,向宏发等,1998.龙陵-澜沧断裂带双震型强震活动破裂模型讨论.地震地质,20(3):70—76.
    Wells D.L.,Coppersmith K.J.,1994.New empirical relationship among magnitude,rupture length,rupture width,rupture area,and surface displacement.Bull.Seism.Soc.Amer.,84(4):974—1002.
    Working Group on California Earthquake Probabilities,2003.Earthquake probabilities in the San Francisco BayRegion:2002to2031.USGS Open-File Rept,Appendices2003,3—214.
    Working Group on California Earthquake Probabilities,2008.The Uniform California Earthquake Rupture Forecast.Version2(UCERF2):U.S.Geological Survey Open-File Report2007-1437and California Geological SurveySpecial Report203.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心