湖北省麻城市两路口钨矿地质特征、成因及找矿前景探讨

Discussion on Geological Characteristics and Genesis of Tungsten Deposit in Lianglukou,Macheng City,Hubei Province

湖北省麻城市两路口钨矿位于桐柏—大别造山带中部,为该区域首次发现的有一定规模的热液型白钨矿床。钨矿体赋存于近EW向构造破碎带内,顶底板为二长花岗质片麻岩,矿体产状及品位稳定。研究区内断裂构造发育,EW向断裂为重要的控矿构造;Mo、W、Bi元素地球化学异常套合较好、重现性较好,异常长轴方向与构造方向一致;包裹体均一温度集中在320~380℃;区内脉岩年龄及与钨矿伴生的辉钼矿年龄均在130 Ma左右;钨矿体严格受构造控制,且深部延伸稳定,矿床为构造控矿高温热液型钨矿床。两路口地区钨矿成矿地质条件良好,成矿潜力较大,EW向、NNE向深部尚存较大找矿潜力,东部ZH2、ZH3综合异常区也存在一定的找矿前景。

The Lianglukou scheelite deposit is located in the middle of Tongbai-Dabie Metallogenic Belt,and it’s the first discovery of medium scale hydrothermal scheelite deposit in the metallogenic belt.Tungsten ore bodies is controlled by EW-trending structural broken belt.The roof and floor of the orebody are monzonitic gneiss.The occurrence and grade of ore bodies are stable.Fault structures are developed in the study area,and EW trending faults are important ore controlling structures.The geochemical anomalies of Mo,W and Bi elements are well matched and reproducible.The geochemical anomalies long axis direction is consistent with the structural direction.Homogenization temperature of inclusions are from 320 to 380℃.The ages of veins and molybdenite associated with tungsten deposits in the area they are all 130 Ma.Drilling shows that tungsten orebody is strictly controlled by structure and its deep extension is stable.Speculation that Liangkou tungsten deposit is a typical tectonic ore-controlling high temperature hydrothermal tungsten deposit.It is believed that the Lianglukou area have good metallogenic geological conditions and great potential for mineralization.The deep parts of EW and NNE fault have great prospecting potential,the ZH2 and ZH3 comprehensive anomalies in the east also have certain prospecting prospects.