高密度电法在山东土堆—沙旺金矿的应用

Application of high-density resistivity method in Tudui toShawang gold deposit, Shandong

山东土堆—沙旺金矿产于古元古界荆山群和新元古代牧牛山二长花岗岩体与中生代脉岩中。矿体与围岩的界线一般根据黄铁矿化的强弱以及硅化、绿泥石化等蚀变程度和岩石破碎程度来区分。通过对矿体、围岩和各种脉岩极化率和电阻率参数的测定,矿体的极化率一般大于7%,围岩一般小于7%,而矿体与围岩的电阻率没有明显差异。在已知金矿体和未知区做了3条高密度电法剖面,结果表明:充电率参数特征能够指示矿体空间位置;电阻率参数特征与矿体在空间上有相关关系。

The Tudui to Shawang gold deposit in Shandong occurred in Jingshan group of early Proterozoic and Muniushan adamellite of late Proterozoic and dikes of Mesozoic. The demarcation line of ore bodies and country rocks is judged by the degree of pyritzation, silicification and chloritization and the degree of rock crushing. The determination of polarization and resistance ratio of the ore bodies and country rocks shows that the polarization of ore bodies is more than 7% and country rocks is less than 7%, and the resistance ratio is similar between ore bodies and country. Three highdensity resistivity method crosssection have surveyed on gold ore bodies and unknown area, the result is that the polarization parameter could indicate the spacial location of gold deposit and the resistance ration parameter has close relation with gold deposit in spacial.