综合物探在斑岩型银钼多金属矿勘查中的应用  

The application of integrated geophysical exploration technology to the prospecting for porphyry silver-molybdenum polymetallic deposits

作　　者：陆桂福[1] 米宏泽[1] 刘瑞德[1] 林天亮[1] 

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000

出　　处：《物探与化探》2014年第4期835-839,共5页Geophysical and Geochemical Exploration

摘　　要：地球物理勘查的每一种方法都存在多解性。为了提高解释结果的可靠性,充分发挥各方法的优势,使之取得地质上最佳勘查效果,在架子山地区矿床地质勘查中综合运用了高精度磁法、激电中梯测量和可控源音频电磁测深等地球物理勘探方法,取得了较好的勘查效果。经由钻孔验证,在765 m深度见矿厚度26 m,钼的最高品位5%。可控源音频大地电磁测深低阻带是良好的物探找矿标志,激电中梯的视充电率异常和高精度磁测梯度带也是找矿的重要标志。因此,CSAMT异常、视充电率异常和高精度磁测异常的组合是该区寻找深部银、钼隐伏矿体的重要物探标志。综合地球物理勘探方法的运用,在该区的矿产勘查中具有指导意义。Every kind of geophysical exploration method has the problem of multiple solutions. In order to improve the reliability of interpretation results,give full play to the advantages of each method,and make the best of geological exploration results,the authors conducted integrated exploration of ore deposit and geology in the Jiazishan area,which included high precision magnetic method,IP measurement and controlled source audio-frequency electromagnetic sounding geophysical prospecting,thus achieving good exploration results. Drilling verification demonstrated that at the depth of 765 m there exists an ore layer 26 m in thickness,with the highest grade of molybdenum being 5%. The low-resistivity zone detected by controlled source audio-frequency magnetotelluric sounding can be regarded as good geophysical prospecting marks,and the apparent chargeability anomaly of IP medium gradient and the gradient belt of high precision magnetic survey can also serve as important indicators for ore-prospecting. Therefore,the combination of CSAMT anomaly,apparent chargeability anomaly and high-precision magnetic anomaly can serve as an important criterion in search for concealed silver and molybdenum orebodies. The use of integrated geophysical exploration methods has a guiding significance in mineral exploration of this area.

关 键 词：综合地球物理勘查 斑岩型 银鉬多金属矿床 找矿标志 架子山 

分 类 号：P631[天文地球—地质矿产勘探]