下关塘子铺温泉的水文地球化学特征

THE HYDROGEOCHEMICAL CHARACTERISTICS OF TANGZIPU HOT SPRING, XIAGUAN

下关塘子铺温泉自1970年开展水氡观测以来,水氡的前兆异常特征较为明显,对应过多次强烈地震,也成功的预报过一些地震。通过18年的观测实践,证明下关塘子铺温泉是地震观测工作中的一个灵敏点。 为探讨其灵敏原因,近年来围绕温泉、沿西洱河断层普查了一批水点,其中有4个温泉、2个冷泉、地表水两处。测定了水氡、水温、常规水质及溶解气体。企图从水文地球化学特征入手,初步探讨温泉水氡的机理,并进而探讨水氡前兆灵敏性的原因。

Since the initiation of water radon observation at Tangzipu Hot Spring, Xiaguan in 1970, remarkably clear precursory anomalies in water radon were detected which corresponded to several earthquake occurrences, and has been used to successfully predict several shocks. The observational prectices in the past 18 years show that Tangzipu Hot Spring is a sensitive site in our seismo-logical monitoring work.With the view to investigate the reason of such sensitivity, a number of hydrochemical sites around the hot spring and along the Xi'cr River were chosen in recent years for the measurement of water radon, temperature, regular water property and dissolved gas. Among those sites, 4 were hot springs, 2 cold springs and 2 surface water sites. The aim of our study is to preliminarily investigate the mechanism of radon in the hot springs in the light of their hydrogeochemical features, and further to understand the factors causing the precursory sensitiveness of the water radon.