综合物探方法在多不杂斑岩型铜金矿床的应用

摘要

High precision magnetic,IP intermediate gradient,IP sounding and ATM surveys etc.,were jointly carried out at line 0 in Duobuza porphyry Cu deposit to make clear of variation of magnetism and electricity caused by the Cu (Au) ore bodies.Results show that the integration is effective for prospecting such ore.First the high precision magnetic survey is conducted to lineate the porphyry;at the same time IP intermediate gradient coverage to locate enrichment of sulfides,IP sounding to outline spatial distribution of the anomlies at the favorable metallogenic positions according to geological and geochemical data;then AMT sounding to obtain deep electric structural feature at profile and jointly judge it is a ore-caused anomly.The integration is low in cost and prospecting risk.%通过在西藏多不杂斑岩型铜金矿床0号勘探剖面开展高精度磁测、激电中梯剖面、激电测深、音频大地电磁测深(AMT)等多种物探方法,了解多不杂斑岩铜金矿体引起的磁、电变化特征,证明该方法组合在多不杂斑岩型铜金矿区找矿的有效性,为多龙矿集区下一步的找矿工作选择了合适的物探方法组合.首先利用高精度磁测圈定斑岩体的范围,同时利用激电中梯扫面准确定位硫化物富集区域,结合地质、化探等资料在成矿有利地段利用激电测深来识别异常的空间展布形态,最后利用音频大地电磁测深获得剖面深部电性结构特征,综合多种手段判断是否为矿致异常,降低了地质找矿的风险.