【摘要】 本实验室研制了一台专门用于测定溶于地下水岩石圈中的气体He/Ar、N₂/Ar比值的质谱装置。对氦的探测灵敏度小于0.1ppm,精度±0.2%。用该装置对北京两处地下热水进行了连续分析。在邢台发生6.1级地震前半个月He/Ar比值明显增高并持续上升到地震前一周,最高值比正常值高40%,然后逐渐下降到正常值。更多还原

【Abstract】 A new special spectral equipment has been developed in our laboratory for measuring He/Ar, N₂/Ar ratio of lithosphere gases in groundwater. Its sensitivityfor He is less than 0.1 ppm, the precision is within ± 2%. Hot groundwaterwas measured continually by this equipment at two places in Beijing. Half amonth before the earthquake of 6.1 classss occurred in Xingtai, the He/Ar ratiobegan to increase obviously and went up continually for one week before theearthquake. The maximum volume was 40% higher than the normal, then wendown gradually to normal level.更多还原