则邑断裂活动性与潜在震源区划分研究
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摘要
则邑断裂是滇中块体内部一条北西向的晚更新世活动断裂,通过对它的地质地貌调查、断裂活动性鉴定,结合地震活动性资料,确认其为1985年4月18日禄劝6.2级地震的发震构造。据此作为识别潜在震源区的标志,划分了则邑潜在震源区,同时充分考虑了小震活动密集条带和余震的分布范围,由此确定了潜源的位置、边界和震级上限。则邑潜在震源区的划分是对滇中地区潜在震源划分方案的补充;作为实例也对重大工程场地地震安全性评价工作中对场地有重要影响的潜在震源区细化工作具有一定的参考意义。
Lying on the midland block of Yunnan internally,Zeyi fault is a Q3 active fault,which bearing is north west direction.Based on field geological and geomorphological investigation and identification of fault activity,as well as the data of seismicity,this papper validates that Zeyi fault is the seismogenic structure of the Ms6.2 Luquan earthquake in 1985.So as to offer an insight into the seismotectonic indicator for delineation of Zeyi potential seismic source.And its determination of the location,upper-bound magnitude and the boundaries have been discussed,with attentively considering the belt of intensive small earthquakes and the distribution of aftershocks.The new Zeyi potential seismic source is a supplement to delineation potential seismic sources in the midland block of Yunnan.As an example,this work will be valuable for the detailed researches of seismic tendency in the seismic safety evaluation of important engineering.
Lying on the midland block of Yunnan internally,Zeyi fault is a Q3 active fault,which bearing is north west direction.Based on field geological and geomorphological investigation and identification of fault activity,as well as the data of seismicity,this papper validates that Zeyi fault is the seismogenic structure of the Ms6.2 Luquan earthquake in 1985.So as to offer an insight into the seismotectonic indicator for delineation of Zeyi potential seismic source.And its determination of the location,upper-bound magnitude and the boundaries have been discussed,with attentively considering the belt of intensive small earthquakes and the distribution of aftershocks.The new Zeyi potential seismic source is a supplement to delineation potential seismic sources in the midland block of Yunnan.As an example,this work will be valuable for the detailed researches of seismic tendency in the seismic safety evaluation of important engineering.
引文
[1]胡聿贤.安评教程.
[2]刘正荣、陈敬.1985年4月18日云南禄劝地震,地震学报,8(增刊):161～165.
[3]吴明熙,等.1985年禄劝地震部分余震的精确定位,地震学报,1990,12(2):121～129.
[4]陈立德,等.1985年云南禄劝地震,地震,1986,2.
[5]刘正荣,禄劝地震研究,地震研究,1985,8(增刊).
[6]张艺娟,等.禄劝地震序列的地震定位,地震研究,1985,8(增刊).
[7]王绍晋,等.禄劝地震序列的震源机制,地震研究,1985,8(增刊).
[8]鄢家全、贾素珍.中强地震潜在震源区划分原则和方法的研究进展,国际地震动态,1997,2.
[9]周荣军,唐荣昌,雷建成.四川盆地潜在震源区的细致划分,四川地震,2005,3.
[10]周庆,虢顺民,向宏发.滇西北地区潜在震源区的划分原则和方法,地震地质,2004,26(4).
[11]周本刚,杨晓平,杜龙.广西防城一灵山断裂带活动性分段与潜在震源区划分研究,震灾防御技术,2008,3(1).
①②云南省地震工程研究院,洗马河二级水电站工程场地地震安全性评价与区域稳定性评价报告,内部资料,2004.
①李克昌、姚孝执、李盛德等,1985年4月18日禄劝6.2级地震烈度及地震构造考察报告,云南省地震局档案室,1985.5.
[2]刘正荣、陈敬.1985年4月18日云南禄劝地震,地震学报,8(增刊):161～165.
[3]吴明熙,等.1985年禄劝地震部分余震的精确定位,地震学报,1990,12(2):121～129.
[4]陈立德,等.1985年云南禄劝地震,地震,1986,2.
[5]刘正荣,禄劝地震研究,地震研究,1985,8(增刊).
[6]张艺娟,等.禄劝地震序列的地震定位,地震研究,1985,8(增刊).
[7]王绍晋,等.禄劝地震序列的震源机制,地震研究,1985,8(增刊).
[8]鄢家全、贾素珍.中强地震潜在震源区划分原则和方法的研究进展,国际地震动态,1997,2.
[9]周荣军,唐荣昌,雷建成.四川盆地潜在震源区的细致划分,四川地震,2005,3.
[10]周庆,虢顺民,向宏发.滇西北地区潜在震源区的划分原则和方法,地震地质,2004,26(4).
[11]周本刚,杨晓平,杜龙.广西防城一灵山断裂带活动性分段与潜在震源区划分研究,震灾防御技术,2008,3(1).
①②云南省地震工程研究院,洗马河二级水电站工程场地地震安全性评价与区域稳定性评价报告,内部资料,2004.
①李克昌、姚孝执、李盛德等,1985年4月18日禄劝6.2级地震烈度及地震构造考察报告,云南省地震局档案室,1985.5.
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