乌鲁木齐10号泉He含量变化的映震特征

本文从监测泉点的水文地质概况入手,结合近19年来的资料分析了10号泉水中氦含量变化的映震特征：氦含量变化的地震前兆异常基本上都是正异常,且具有较好的重复性,泉点即流量测值遵循：背景值一趋势性上升（或突升）－最高值－趋势性下降（或突降）－恢复至背景值的变化过程。而地震常常发生在氦含量由高变低的过程中。最后初步认定了泉点较好的地质构造环境和氦特有的化学特性是该泉氦具有映震灵敏性的原因。

Change of He Content in spring-water of Urumqi 10th Well and corresponding ability to earthquakes

The hydrogeology conditions around Urumqi 10th well and the helium content observation data for 19 years are introduced The response characteristics of the helium content change in spring-water show that the helium content will increases if there is to be an earthquake After an earthquake, the helium content decreases to its normal level This response characteristic keeps well in our researching period The flow rate of spring-well changes as following procedure: background level - trending-increase (or suddenly jump up) - peak level - trending-decrease (suddenly jump down) - background level When the helium content in spring-water changes from peak to low, often an earthquake occurs At last, we think that both hydrogeology conditions and circulation environment of spring-water flowing are key factors to explained above response characteristics for an earthquake