贵州赫章蟒洞铅锌矿床地质特征及成因分析

Geological Characteristics and Genesis Analysis of Mangdong Lead-Zinc Deposit in Hezhang of Guizhou

通过对本矿床地质特征的综合研究,并结合区域上前人的研究成果,初步探讨了蟒洞铅锌矿床成因。矿区内铅锌矿体产出形态有陡脉状和缓倾斜似层状两种类型,主要产于二叠系地层中,赋矿围岩主要为碳酸盐岩,矿石类型主要有氧化矿石和硫化矿石两种。矿区内围岩蚀变发育,主要为低温热液蚀变,其中,白云石化与成矿关系最为密切。结合前人的研究及该矿床的地质特征,文章认为该矿床具有热液矿床的特征,为改造型中低温热液矿床。

Based on the comprehensive study of the geological characteristics of the deposit and the previous research results of this area,the genesis of Mangdong lead-zinc deposit is preliminarily discussed.There are two types of lead-zinc orebodies in the mining area,i.e.steep and gently inclined bedded vein,which are mainly produced in Permian strata.The ore bearing rocks are mainly carbonate rocks,and the ores in the deposit are mainly oxidized ores and sulfide ores.Wall rock alteration develops in the mining area and it is mainly low-temperature hydrothermal alteration.Dolomitization is the most closely related to mineralization.Based on previous studies and geological characteristics of the deposit,it is considered that the deposit with characteristics of hydrothermal deposits is a modified medium low temperature hydrothermal deposit.