安徽马头斑岩型钼铜矿异常结构研究

Anomaly Structure of the Matou Porphyry Mo-Cu Deposit in Anhui Province

利用元素质量平衡计算方法,将元素含量转换成迁移量,直观展现出由元素迁移量构成的原生异常,根据异常的空间分布规律,总结出了由成矿地球化学环境指示元素(Na2O、Ba、Sr)负异常、矿化剂元素(S)正异常、成矿元素(Mo、Cu)及其伴生元素(Ag、As、Sb、W等)正异常构成的马头斑岩型钼铜矿原生异常结构,利用原生异常结构可以对深部成矿前景进行判断和评价;地表岩石(屑)测量结果表明研究区地表同样存在异常结构,且对原生异常结构有很好的继承性,利用地表异常结构可以指明找矿方向、成矿有利地段和矿床产出位置。上述研究成果的取得,不仅丰富和充实了地球化学勘查方法技术,为其他同类型矿床的地球化学勘查提供了参考案例,同时对勘查地球化学应用基础理论而言也是有益的尝试。

By using element mass balance calculation,the element content was converted to migration quantity to intuitively exhibit primary anomalies composed of element migration amount. According to the spatial distribution of these anomalies,this study revealed the primary anomaly structure consisting of negative anomalies of the ore-forming geochemical environment indicator elements Ba,Sr,Na2 O and positive anomalies of mineralizer S,metallogenic elements Mo,Cu and associated elements Ag,As,Sb,and W. The results of surface rock( debris) survey show that such anomaly structure also exists at the surface and has a good inheritance of the primary anomalous structure. Using this anomaly structure we can effectively indicate prospecting direction,favorable mineralization sections and ore deposit locations. This research has not only enriched geochemical prospecting methods,but also provided a reference case for geochemical exploration in other areas with the same type of ore deposits. It is a beneficial attempt in basic research of exploration geochemistry.