湖南邵东县石桥铺矿区铅锌矿地质特征及找矿前景探讨

Geological Characteristics and Exploration Prospect of the Lead-zinc Deposit in the Shiqiaopu, Shaodong County, Hunan

湖南邵东县石桥铺铅锌矿是产于岩体构造破碎带中,属中—低温热液裂隙充填型矿床,位于关帝庙穹窿内,成矿时代为新华夏系。目前该矿区的一号断裂带、四号断裂带和九号断裂带中的局部地段发现有铅锌矿体和矿化体。岩浆期后的断裂带为后期矿体的形成提供了有利的矿液运移通道和储矿空间;新华夏系断裂控制着本矿区内矿体的形态、大小、产状等,是矿区内的主要控矿、容矿构造。且矿体具有明显的垂直分带特征,上部主要为萤石矿、重晶石矿,中、下部为铅锌矿。本文根据矿体地质特征、变化规律,分析矿床成因,总结找矿标志,为矿区找矿前景进行探讨和分析,为外围找矿提供思路。

The lead-zinc deposit in the Shiqiaopu, Shaodong County, Hunan is a structure controlled meso- and epi-hydrothermal fissure filling type of lead-zinc mine and occur in an intrusion, which is located in the Guandimiao dome and formed in the Neocathaysian. The lead-zinc ore and mineralization bodies have been discovered in local sections of the NO.1, NO.4 and NO.9 fault belts in the deposit area. Post-magmatism fault belts provide favorable channel for the migration of ore-bearing solutions and oreaccumulating space for the late stage ore bodies. The neocathaysian faults control the shape, scale and occurrence of the ore bodies and are the mian ore-controlling and ore-hosting structures. The ore bodies have obvious vertical zoning with fluorite and barite deposits in the upper and lead-zinc deposits in the lower. Based on the geological characteristics and the change regulation of ore bodies, analyses the genesis of mineral deposit, sum marizes the criteria for ore prospecting and discuss the prospecting potential, in order to provide ideas for prospecting on the periphery of this mineralized field.