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滇西南地区龙陵—澜沧断裂带地震危险性评价
引用本文:邵延秀,袁道阳,梁明剑.滇西南地区龙陵—澜沧断裂带地震危险性评价[J].地震学报,2015,37(6):1011-1023.
作者姓名:邵延秀  袁道阳  梁明剑
作者单位:1.中国兰州 730000 中国地震局兰州地震研究所
基金项目:地震预测研究所基本科研业务专项2012IESLZ08公益性行业科研专项“中国地震活断层探察南北地震带中南段”201108001
摘    要:龙陵—澜沧新生地震断裂带位于地震活动强烈的滇西南地区, 该地区历史上曾发生多次MS≥7.0大地震, 已知的历史地震破裂几乎覆盖了整条断裂带. 本文首先对滇西南地区主要断裂的最新构造活动特征进行分析; 然后通过该区域地震活动b值图像的空间扫描计算, 圈定出高应力集中区, 并结合历史地震和现今小震的分布情况以及晚第四纪以来断裂的活动强度、 古地震最晚离逝时间等定量参数, 综合分析龙陵—澜沧断裂带的未来大震危险性; 最后基于地震空区理论, 识别该断裂带存在的地震空区. 研究结果表明, 龙陵—澜沧断裂带内的龙陵、 永德、 沧源、 澜沧及孟连断裂中东段在未来10年内均存在发生中强以上地震的危险性, 应引起关注. 

关 键 词:龙陵—澜沧断裂带    b    地震空区    地震危险性
收稿时间:2015-03-11

Seismic risk assessment of Longling-Lancang fault zone,southwestern Yunnan
Affiliation:1.Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China2.Lanzhou National Observatory of Geophysics, Lanzhou 730000, China3.Earthquake Administration of Sichuan Province, Chengdu 610041, China
Abstract:Longling-Lancang fault zone in southwestern Yunnan is an area with strong seismicity. Multi strong earthquakes with MS≥7.0 hit the area and nearly ruptured the whole fault zone during last 100 years. This paper summarized characteristics of recent tectonic activities and calculated b value of the studied area first of all, and then combined with the distribution of historical strong earthquakes and modern small ones, the fault activity since Late Quaternary and elapse time to analyze the potential seismic risk in the future synthetically. Finally, based on the seismic gap theory, the seismic gaps in the fault zone are identified. The results show that the Longling, Yongde, Cangyuan, Lancang along the fault zone and middle-east segment of Menglian fault have a potential of moderate-strong earthquake occurrence in the future ten years. 
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