河南省汝阳县里沟铅锌矿地质特征及找矿预测  

Geological Characteristics and Prospecting Prediction of Ligou Lead-zinc Deposit in Ruyang County,Henan Province

作　　者：星东 XING Dong(Henan Third Geological Exploration Institute Co.,Ltd.,Zhengzhou,Henan 450014,China;Engineering Technology Research Center for Deep Hole Drilling for Metal Minerals in Henan Province,Zhengzhou,Henan 450014,China)

机构地区：[1]河南省第三地质勘查院有限公司,河南郑州450014 [2]河南省金属矿产深孔钻探工程技术研究中心,河南郑州450014

出　　处：《中国锰业》2024年第3期90-98,共9页China Manganese Industry

摘　　要：河南里沟铅锌矿地处华北陆块南缘,位于卢氏-栾川-南召-方城多金属成矿带中段,成矿地质条件优越。通过对区域成矿地质背景、矿区地质特征、矿床地质特征等的详细分析,总结了构造、蚀变、物探异常等找矿标志,并进行了找矿预测。研究结果表明:矿体主要赋存于近东西向、北东向早期构造破碎带中,呈脉状、透镜状沿破碎带分布,矿体形态产状严格受破碎带控制;矿体围岩蚀变以线型绢英岩化、硅化、绿泥石为主,次为碳酸盐化,并与铅矿化关系密切;EH4大地电磁测深可以有效圈定矿致异常。上述成果表明,EH4大地电磁测深法可快速圈定铅锌矿化异常体,对于寻找区域内同类型矿床有一定的借鉴价值。The Ligou lead-zinc deposit in Henan is situated on the southern edge of the North China landmass,within the Lushi-Luanchuan-Nanzhao-Fangcheng polymetallic mineralization belt,characterized by favorable geological conditions for mineralization.A thorough analysis of the regional geological background,the geological characteristics of the mining area,and the deposit itself was performed,summarizing ore exploration indicators such as structural features,alteration,and geophysical anomalies,and making predictions for ore exploration.The study reveals that the ore bodies are predominantly hosted in early structural fracture zones trending east-west and northeast,exhibiting a vein-like or lens-like distribution along these zones.The morphology and orientation of the ore bodies are strictly governed by the fracture zones.The associated rock alteration is predominantly sericitization,silicification,and chloritization,with carbonation occurring less frequently,and these alterations are closely associated with lead mineralization.The EH4 magnetotelluric(MT)sounding effectively delineates mineral-induced anomalies.The findings suggest that the EH4 MT sounding method can swiftly identify anomalous bodies of lead-zinc mineralization,offering valuable insights for the exploration of similar deposits in the region.

关 键 词：里沟铅锌矿 物探异常 矿床成因 地质特征 找矿前景 

分 类 号：P612[天文地球—矿床学]