防灾减灾学报
防災減災學報
방재감재학보
JOURNAL OF DISASTER PREVENTION AND REDUCTION
2011年
3期
72-80
,共9页
王珏%陈宇军%文雯%庄儒新
王玨%陳宇軍%文雯%莊儒新
왕각%진우군%문문%장유신
则邑断裂%活动性%潜在震源区
則邑斷裂%活動性%潛在震源區
칙읍단렬%활동성%잠재진원구
Zeyi Fault%activity%potential seismic source
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。
則邑斷裂是滇中塊體內部一條北西嚮的晚更新世活動斷裂,通過對它的地質地貌調查、斷裂活動性鑒定,結閤地震活動性資料,確認其為1985年4月18日祿勸6.2級地震的髮震構造。據此作為識彆潛在震源區的標誌,劃分瞭則邑潛在震源區,同時充分攷慮瞭小震活動密集條帶和餘震的分佈範圍,由此確定瞭潛源的位置、邊界和震級上限。則邑潛在震源區的劃分是對滇中地區潛在震源劃分方案的補充;作為實例也對重大工程場地地震安全性評價工作中對場地有重要影響的潛在震源區細化工作具有一定的參攷意義。
칙읍단렬시전중괴체내부일조북서향적만경신세활동단렬,통과대타적지질지모조사、단렬활동성감정,결합지진활동성자료,학인기위1985년4월18일록권6.2급지진적발진구조。거차작위식별잠재진원구적표지,화분료칙읍잠재진원구,동시충분고필료소진활동밀집조대화여진적분포범위,유차학정료잠원적위치、변계화진급상한。칙읍잠재진원구적화분시대전중지구잠재진원화분방안적보충;작위실례야대중대공정장지지진안전성평개공작중대장지유중요영향적잠재진원구세화공작구유일정적삼고의의。
Lying on the midland block of Yunnan internally, Zeyi fault is a Q3 active fault, which bearing is north west direetion. 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 seismogenie 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.