地电化学法在南澳大利亚寻找隐伏金矿的研究

Electro-geochemical Method in the Search of Concealed Gold Deposits in South Australia

地电化学法是一种借外加电场作用,将呈活动态的金属离子迁移到特制接收装置,收集并分析接收器上的电解物,可发现与矿有关的金属离子异常,从而达到找矿和评价目的的一种找矿方法。利用地电化学法在澳大利亚干燥近沙漠化钙质层覆盖区的Challenger金矿和Kalkaroo铜金矿进行可行性试验结果显示:在上述已知矿体的剖面上均测出了清晰的地电化学异常,而同时开展的土壤地球化学测量无异常显示。表明利用地电化学法在南澳大利亚干燥近沙漠化覆盖区寻找隐伏金属矿床是有效的。在此基础上,利用该方法在Challenger金矿区外围及深部进行了找矿预测,发现了3个有利的成矿靶区,并经工程验证发现1个金矿体,获得了相应的金储量,取得了良好的社会经济效益。

Electro-geochemical method is an exploration technique for mobilizing and collecting ions from the orebody to near surface with special e- quipment placed in the soil, and applying a small current for a sustained period. Through feasiblity experiment, it＇s obtained that the clear electro-geo- chemical abnormalities were detected in Challenger and Kalkaroogold deposit in South Australia, while the soil geochemical survey carried out showed no abnormalities. As a result of our experiments, we concluded that the electro-geochemical method is effective to look for concealed gold deposits in South Australia. On this basis, three favorable ore-forming targets were prognosticated in the external and deep areas of Challenger gold mine, and one of them had been found by the project, achieving good social and economic benefits.