乌鲁木齐9、10号泉F~-映震特征的研究

从监测泉点的水文地质概况入手，结合近18年来的观测资料，分析并总结了9、 10号泉水中F-的映震特征： F-的地震前兆异常基本上都是正异常，且具有较好的重复性，即基本上遵循： 背景值-脉冲式突升-最高值-突降-恢复至背景值的规律。 而地震常常发生在F-含量恢复背景值后数天或数十天，仅有个别地震发生在F-含量达最高值时。 最后，初步认定了泉点较好的地震构造环境是造成该9、 10号泉F-具有映震灵敏性的原因。

An investigation on the characteristics of earthquake-indicating variations of F-in Wulumuqi No.9 and No.10 springs

The characteristics of earthquake-indicating variatio ns of F-in the wa ter of No.9 and No.10 springs are analysed and summed up，starting with the mo ni toring of the hydrogeologic setting of the spring sites，combined with the obser vational data of the recent 18 years. Precursory anomalies of F-appear basica lly as positive anomalies and show good repeatability. They vary basically as foll ows: background value-impulsive sudden rise-maximum value-sudden drop-return to the background value. Earthquakes usually occur several days or ten s of days after the F-content's return to the background value，and only few q ua kes occur at the time of the maximum value of the F-content. Finally，a prel imin ary conclusion is reached，that is，the reason for the good earthquake-indicatin g sensitivity of the F-in the No.9 and No.10 wells is the rather good seism otectonic environment of the spring sites.