兰州市活动断层土壤气汞氡地球化学特征场地试验.pdfVIP

32 3 V o.l 32 N o. 3 2010 9 NORTHW ESTERN SE ISM OLOG ICAL JOU RNAL Sept. , 2010 1, 2 1 1, 2 1, 2 张 慧 , 张新基 , 苏鹤军 , 刘旭宙 ( 1. 中国地震局兰州地震研究所, 甘肃兰州 730000 2. 中国地震局地震预测研究所兰州科技创新基地, 甘肃兰州 730000) : 在兰州市主要活动断层上选择有断层 头或有钻孔资料的典型场地开展了断裂带土壤气异 常特征及其影响因素的试验研究结果显示断层带上方土壤气氡汞不仅具有明显的峰值异常显 示, 而且其异常的形态特征对断层产状和断层性质有显著的反映, 断层土壤气测量是活断层探测和 研究的有效方法结果还显示覆盖层厚度对断层带土壤氡汞浓度的峰值形态及特征具有显著的 影响 : ; ; ; ; : P 593 : A : 1000 - 0 844( 2010) 03- 0273- 0 6 Field Test on the Geochem ical Features of Radon andM ercury from SoilGas on the Active Faults in Lanzhou 1, 2 1 1, 2 1, 2 ZHANG H u i , ZHANG X inji , SU H ejun , L IU Xuzhou ( 1. Lanzhou Institute of Seismology, CEA, Lanzhou 730000, China; 2. Lanzhou Base of Institute of Earthquake Science, CEA, Lanzhou 730000, China) Abstract: Concentration s o f radon and m ercury in so il gas w hich w ere ob tained on the m a in active faults in Lanzhou c ity are m easured. T he sam ple po ints w ere se lected at the site w here the outcrop o f fault ex ists or there are bo reho le data. T he result show s th at not only the peakvalu e anom a lies of radon and m ercury in so il gas on the active fault show obv iou sly, but also their sh ap e characters reflect the fau lt location, fault property, and fault attitu de w el.l It is proved th at gas survey is a usefu lm ethod for active fault ex p loring and study. T he resu lt show s also th at the sh ap e and characterist ics of p eakva lu e anom