摘要
简要分析了水口水库诱发地震的地质环境条件和初始应力 ,利用库区垂直形变监测资料 ,研究了大坝的坝体变形、库区近期垂直形变异常和断裂活动特征。分析表明 ,大坝坝体近期沉降偏大 。
In this paper,the geological environment conditions and the original stress of induced earthquake in Shuikou Reservoir region are analyzed.Based on the vertical deformation data observed, the deformation of the dam body and the anomaly of the vertical deformation and the fault activity are studied.The results show that the recent subsidence of the dam body is bigger and it must be noticed.Key words:Reservoir earthquake ; Fault activity ;Inducing earthquake condition ;Vertical deformation? （ ｘ ＝０．２ ａｎｄ ０．３２） ｗｅｒｅ ｓｙｎｔｈｅｓｉｚｅｄ ｕｎｄｅｒ 4.0 GPa and at 1090℃ with the starting materials TiO 2 and Eu 2O 3.XRD measurements show that the samples are cubic. 151 Eu Mo ¨ssbauer spectra exhibits two peaks at ca. 0 and -13mm/s,which suggests that Eu ions are in mixed valence of +2 and +3.Only one signal with linewidth 3140 Guss and g =2.00 is observed within the range of 480 to 6480G.The absence of the signals associated with Ti 3+ and A site deficiency indicates that Ti ions is Ti 4+ .In the process of solid state reaction,Eu 3+ ions are easier reduced than Ti 4+ .
出处
《华南地震》
1999年第4期77-81,共5页
South China Journal of Seismology
关键词
水库地震
断裂活动
诱震条件
垂直形变
工程地震
high pressure and high temperature
Eu 1- x K x TiO 3
Mo ¨ssbauer spectrum
EPR
