河南栾川大竹园沟钨钼矿区地质特征及找矿远景

大竹园沟钨钼矿区位于华北陆块南缘与秦岭褶皱系的衔接部位、北秦岭构造带瓦穴子断裂北侧，成矿区带上处于秦岭-大别成矿省东秦岭金属-非金属成矿带宽坪Au-Mo-金红石矿化集中区内，为寻找钨钼多金属矿的有利地区。结合地质矿产调查1∶5万高精度磁法测量、1∶5万水系沉积物测量成果，总结分析了区域成矿地质背景。为查明矿区内地质成矿条件及中深部矿化特征，开展了1∶1万地质简测、1∶1万土壤化探及坑探、钻探等系统的矿床勘查工作。物化探异常及探矿成果研究表明：①区内钨钼矿床的主要控矿因素为岩体、构造，花岗闪长斑岩为成矿母岩，赋矿岩石为宽坪群二云石英片岩及花岗闪长斑岩，在断层或褶曲等构造部位，常常形成富矿体；②区内钨钼矿主体为斑岩型矿床，在内接触带花岗闪长斑岩中形成斑岩型矿体，在外接触带二云石英片岩中形成细脉状、浸染状钨钼矿体；③区内初步圈出了5条较大的钨钼矿体，其中 I1、 I2、 I3矿体赋存于宽坪群二云石英片岩中，为二云石英片岩型钨钼矿体； II1、 II2矿体赋存于花岗闪长斑岩与宽坪群二云石英片岩的接触带上，为斑岩型钨钼矿体；④区内圈出了3处钨钼找矿靶区（编号分别为A、B和C），经过工程验证发现靶区内深部存在隐伏花岗闪长斑岩体及多条钨钼矿体，且靶区A内 I1、 II1两条矿体估算的（3341）资源量达中型规模。综合区内成矿地质条件、成矿物质来源以及类比邻近同类型矿床，认为大竹园沟一带中深部具有较大的找矿潜力，值得进一步开展工作。

Recovery of Lead-Zinc from Tailings of Fankou Lead-Zinc Mine

In light of the tailings characters in No. 1 tailing reservoir of Fankou Lead-Zinc Mine, the fine screening at 0.074mm and tabling separation were used to discard 55% of the tailings so as reduce the downstream grinding and flotation cost and meanwhile to enrich the valuable elements such as lead, zinc, silver, gallium, germanium, etc. The flotation condition of lead -zinc minerals was improved by the control of the dosage and time of sodium sulfide addition. All this has resulted in a new process for recovering comprehensively lead and zinc from the lead-zinc tailings. The pilot test results show that a lead-zinc bulk concentrate containing 17.83% lead and 29.60% zinc and having a lead recovery of 71.82% and zinc recovery of 85.46% can be obtained from the tailings by fine screening-classification, gravity separation and flotation.