溶液性质对岩矿超电势的影响及地质意义

INFLUENCE OF SOLUTION NATURE ON OVERPOTENTIAL OF ROCK AND ITS GEOLOGIC SIGNIFICANCE

黄铜矿标本超电势的实验结果表明：在一定的电流密度下，溶液中氧化剂、还原剂含量愈少，超电势则愈大，在自来水、蒸馏水等介质中超电势达到极大值．作者根据反应活化能等理论对该现象作了解释．在野外地质条件下，石墨矿形成了强大的激电异常，而有些小而富的金属硫化矿未观测到明显的激电异常。

Results of overpotential experiment of chalcopyrites sample indicate that: under the fixed current density, the less the oxidizer and agent content of solution, the higher the overpotential is. It reaches the maximum value in such mediums as tap water and distilled water. Based on the theory about activation energy of reaction, an interpretation of this pheomenon is given in the paper. Under the field condition, graphite deposit will cause high IP anomaly, but the anomaly of some small rich metallic sulphide deposits is too small to be observed. The phenomenon can be interpretated by the difference of enclosing rock solution property.