汞的地球化学特征及其映震效能

GEOCHEMICAL CHARACTERISTICS OF MERCURY AND THEIR CORRESPONDENCE TO EARTHQUAKE

汞的地球化学行为取决于汞的物理化学性质．汞在地震活动过程中的异常变化十分明显，映震效能较好。通过分析主要震例发现，汞异常特征普遍表现为高值或正脉冲及其脉冲群。异常分布范围与震级大小有关。一般来说是在异常结束后发震，但也有的是在高值段或异常恢复段发震。异常一般出现于震前几天到几个月不等。

The geochemical behavior of mercury depends on its chemical and physical properties. Mercuryanomalies would be obvious before, during and after earthquakes. Anomalies of mercury concentrationhave a gcod corresPondence to earthquakes. Mercury anomalies are usually characterized by high val-ues, pulses and pulse groups. The larger the anomalous area is, the bigger the earthquake will be.Most of the earthquakes occurred when mercury anomalies almost disappeared, but some occurred dur-ing or after high values were produced. Mercury anomalies generally appear several months to severaldays before earthquakes.