新10号泉水化学测项中强地震前兆异常特征的研究

选取1980年以来距新10号泉300km范围内的16次5级以上地震为研究对象，通过对新10号泉水化学参数在上述地震前后的全程时空扫描，初步总结出该泉水化学测项的前兆异常特征。（1）异常形态各异：硫化物为中期高值异常；氟离子以短期异常和中期异常为主；电导率基本上表现为中期高值异常；水汞以中期高值异常为主，个别地震前会出现临震高值异常；水氡为中期高值异常或年变畸变；甲烷则一般表现为高值中期异常，个别地震前也会在中期异常的基础上叠加大幅度临震异常；氦气为高值正异常。（2）映震对应率：硫化物为81．3％，氟离子为57．1％，电导率为31．3％，水汞为55．6％，水氡为18．8％，甲烷为46．7％，氦气为46．7％。

STUDY ON PRECURSOR ANOMALOUS CHARACTERISTICS OF HYDROCHEMISTRY IN NEW NO.10 SPRING BEFORE STRONG EARTHQUAKES

There are 16 earthquakes with Ms≥5.0 which are in 300 km distance from new No. 10 spring since 1980, studying hydrochemical parameters of new No. 10 spring before the 16 earthquakes, and summarizing the precursor anomalous characteristics , （1） precursor characteritics are different, metaphase high value is abnormity for sulfid, F^-shows short term abnormity and middle term abnormity, conductivity shows high value abnormity of middle term, Mercury content in groundwater shows high value abnormity of middle term, imminent earthquake high value abnormity occurs before individual earthquakes; Water radon shows high value abnormity of middle term or annual aberrance ; firedamp shows high value abnormity of middle term, imminent earthquake abnormity pile up the middle term abnormity before individual earthquakes; helium shows positive abnormity of high value. （2） Corresponding ratio of reflecting capacity： sulfid is 81.3%, F^- is 57.1%, conductivity is 31.3 %, Mercury 46.7% , helium is 46.7%. content in groundwater is 55.6%, water radon is 18.8 %, firedamp is 46.7%, helium is 46.7%.