松潘台拱背氡值资料变化分析  

Study on the changes of dissolved radon in ground water in Songpan Seismic Station

作　　者：赵建军[1] 钟李彬[1] 

机构地区：[1]成都地震基准台四川省地震局,四川成都611730

出　　处：《四川地震》2009年第3期16-19,共4页Earthquake Research in Sichuan

摘　　要：松潘拱背水氡值自1977年11月投入观测以来，其年变化规律呈现的是冬低夏高的形态。通过分析发现，汶川8．0级地震以前，水氡观测值既存在1～3年的中长期趋势变化又表现出3个月左右的短期变化，但临震突跳变化并不突出；而气氡观测值在地震孕育、发生和震后存在以短临突跳的方式相对应，变化幅度在50％以上。但由于观测时间短，这个认识有待进一步探讨研究。2007年底该台增上了数字化气氡观测仪器。通过总结反思，发现松潘台拱背观测水点氡观测值的变化与龙门山断裂带破坏性地震的孕育、发生有一定的对应关系，这些变化为今后研究地下水氡含量变化与附近地震的发生提供了一个很好的对应例子。松潘地震台的水氡和气氡观测值变化能较好地反映龙门山构造带应力积累和地震孕育信息。The observation data of dissolved radon in ground water in Songpan Seismic Station since November 1977 shows an annual changes and the lowest point of data changes is in the winter and the highest point is in summer each year. We analyze the observation data of dissolved radon in ground water and find that before the 2008 Wenchuan MS. 0 Earthquake, the data changes present a middle - and long-term anomaly period lasted for 1 to 3 years. At the same time, the changes of data includes a short-term anomaly period lasted for 3 months. But the changes from observation data of the gas radon escaped from ground water before an impending earthquake are not clear. We think that the observation data of the gas radon escaped from ground water show sudden and short changes likely responding to the preparation and occurring of earthquakes. But examples like are less and further studies are needed. The digitalized instrument of the gas radon escaped from ground water was set up in 2007 and then the observation data are analyzed. We think that in some ways the changes from the observation data are relative to the earthquake preparation and occurring and the observation data can be used for the future if we get more data.

关 键 词：水氡测值突跳 构造活动 地震孕育 

分 类 号：P315.61[天文地球—地震学]