| 甘肃古浪长岭山北麓断裂新活动特征与地震危险性 |
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| 引用本文： | 刘强,王爱国,邵延秀,赵泽贤.甘肃古浪长岭山北麓断裂新活动特征与地震危险性[J].西北地震学报,2011,33(2):123-129. |
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| 作者姓名： | 刘强 王爱国 邵延秀 赵泽贤 |
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| 作者单位： | 中国地震局地震预测研究所兰州基地,甘肃兰州730000;中国地震局兰州地震研究所,甘肃兰州730000 |
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| 基金项目： | 中国地震局地震预测所基本科研业务专项《甘肃古浪和四川汶川两次8级大震构造区对比研究》，西部交通建设科技项目《武罐高速公路抗震优化设计及灾害防治技术研究》，中国地震局兰州地震研究所论著 |
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| 摘 要： | 通过野外调查和探槽开挖,并结合b值计算结果,对位于甘肃省中部古浪县的长岭山北麓断层的几何学、运动学特征、活动性分段及地震危险性进行了研究.研究认为长岭山北麓断裂主要由四条断层组成,总体呈反“S”形展布;断层最新活动在西段f1表现为倾向南的左旋正断性质,在西段f2和中段f3表现为向北倾的左旋正断性质,东段f4又转变为倾向南的左旋正断活动性质,断裂西端以秦家大山南北向隆起及第三系褶皱与古浪断裂隔断,东端以白墩子左旋拉张盆地与罐罐岭断裂左阶排列,阶距3.5 km;断裂带全新世早中期以来有过地震活动,最后一次活动离逝时间较长,现代应力积累较快,为未来地震危险区.
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| 关 键 词： | 长岭山北麓断裂 新活动特征 地震危险性 b值 古浪地震 |
Active Characteristics and Seismic Risk of Northern Piedmont Fault of Changling Mountain in Gulang County, Gansu Province |
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| LIU?Qiang,WANG?Ai-guo,SHAO?Yan-xiu and ZHAO?Ze-xian.Active Characteristics and Seismic Risk of Northern Piedmont Fault of Changling Mountain in Gulang County, Gansu Province[J].Northwestern Seismological Journal,2011,33(2):123-129. |
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| Authors: | LIU?Qiang WANG?Ai-guo SHAO?Yan-xiu and ZHAO?Ze-xian |
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| Institution: | LIU Qiang1,2,WANG Ai-guo1,SHAO Yan-xiu1,ZHAO Ze-xian1,2(1.Lanzhou Base of Institute of Earthquake Prediction,CEA,Lanzhou 730000,China,2.Lanzhou Seismological Institute,China) |
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| Abstract: | The geometric and kinematics characteristics,activity segmentation and seismic risk of northern piedmont fault of Changling mountain in Gulang county,Gansu province are studied through the field investigation,trench excavation and b-value calculation.The results show that the northern piedmont fault of Changlin mountain can be divided into four secondary faults,distributes as an inverse S style in whole,and was active in early and middle stage of Holocene.For the latest motions,f1 at west acted as normal fa... |
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| Keywords: | Northern piedmont fault of Changling mountain Active characteristics Seismic risk b-value Gulang earthquake |
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