摘要
利用山西区域地震台网记录的40个小震、振幅比资料,计算测定了震源参数。并对结果进行分析,初步探讨山西地区小尺度区域的构造应力场特征。如果大体沿山西地区的中心线把它分成东西两区,则最大压应力的方向在东区为北东向;在西区为北西西向。北纬37度以南地区,由于秦岭构造带的影响,地壳应力场表现得有些复杂。山西地区这条中心线的意义在于,在中国地壳应力场中,它可能是一条重要的分界线。
The source parameters of 40 small earthquakes of Shanxi region were determined from computation of the ratio of P and S amplitudes. The result indicates some characteristics of the tectonic stress field of subareas in Shanxi. If Shanxi region is divided into eastarea and westarea by its centerline the direction of the maximum compressional stress is striking NE in the east area, and NW in the west area.The stress field in area in the south of 37°N. L. with the influence of the Qinling tectonic belt, looks somewhat complicated.The centerline of Shanxi region implies that it is probably an important boundaryline in the crustal stress field of China.
出处
《中国地震》
CSCD
北大核心
1990年第2期70-75,共6页
Earthquake Research in China
基金
国家地震局资助项目
