贵州天柱云洞地区铅锌矿的发现及其找矿意义

Discovery of Lead-zinc Deposit and Its Significance in Yundong Area of Tianzhu,Guizhou

通过贵州天柱重晶石矿整装勘查,在天柱云洞重晶石矿床下部发现铅锌矿体,矿体产于陡山沱组地层中,呈层状产出,规模较大,具有"上部重晶石矿,下部铅锌矿"的分布规律。从矿床地质、地化特征等方面研究,获得该矿床属于热水喷流沉积成因的初步证据。通过与典型SEDEX铅锌矿床对比,云洞地区铅锌矿的矿体形态、矿物组合、矿石组构、围岩蚀变,以及沉积、构造环境等,都与典型SEDEX铅锌矿床具有相似性。根据沉积、构造背景分析,认为湘西黔东具备热水喷流沉积(SEDEX)型铅锌矿床的成矿条件,预测天柱坪地—新晃—玉屏一带具有寻找大型铅锌矿床的前景。

By barite fully equipped exploration in Tianzhu, the lead-zinc orebody was found in the lower Yundong barite deposit, it occur in the stratum of Doushantuo formation as layer, the scale is large, has the dis- tribution feature of barite in the up side and lead-zinc in the down side. In the deposit geology and geochemis- try,the primary evidence that the genesis of deposit is hot water jet deposition was known. By compare with the typical SEDEX lead-zinc deposit, the form, composition, assembly, wall rock alteration, sedimentary and struc- tural environment of the lead- zinc deposit in Yundong area were similar to SEDEX lead- zinc depos- it. According to the sedimentary and structural background ,it＇ s thought west Hunan and east Guizhou had the metallogenic condition of hot water jet deposition type lead-zinc deposit, so it predicted Pingdi-Xinhuang-Yu- ping area of Tianzhu has big potential of lead-zinc deposit exploration.