土壤离子电导率法在青藏高原冻土覆盖区寻找隐伏金矿研究

An Application of Soil Ion Conductivity Method in Searching for Concealed Gold Ore in Permafrost Regions of Qinghai——A Case Study of Bangzuo Ma Mining Area in Longzi County,Tibet

为研究土壤离子电导率在青藏高原冻土覆盖条件下反映与金矿体信息有关的可溶性离子以何方向迁移及有何异常特征。通过在冻土所覆盖的西藏邦卓玛金矿0号线剖面上进行土壤离子电导率对比实验,在已知矿体的垂直上方反映出土壤离子电导率异常高且陡,而偏离矿体上方位置则反映的异常微弱。结果表明:土壤离子电导率法在冻土覆盖区条件下,矿体正上方反映的电导率平均异常强度大于矿体斜上方平均异常强度,金矿体在电化学溶解作用产生的可溶性离子,主要以垂直方式迁移到金矿体上方,形成电导率异常,并呈陡峭山峰状,应用该方法在矿区外围宁拉测区进行了找矿预测,圈定出5个有利找矿靶区,解决冻土覆盖区找矿难得问题,为今后类似地区寻找隐伏金矿指明方向。

In this paper,we have made a study of the migration of soil ions and the characteristics of the soluble ions in Qinghai-Tibet Plateau under the conditions of permafrost cover. First,the soil ion conductivity contrast experiment was carried out on the section of the Bangzuoma gold mine line covered by permafrost in Tibet. In the vertical direction of the known ore body in reflecting the soil ion conductivity is unusually high and steep. While the deviation from the ore body is above the location,it reflects the abnormal weakness. The results show that the ionic ions produced by the electrochemical dissolution of gold ore-body in permafrost region under the condition of permafrost cover are mainly in the form of steep peaks. And the method is used to forecast the prospecting in Ningla prediction area. Five favorable prospecting targets are delineated to find the direction of the gold body in permafrost area.