湖南清水塘铅锌矿床地质特征及找矿标志

Geological characteristics and prospecting criteria of Qingshuitang lead-zinc deposit in Hunan Province,China

湖南省祁东县清水塘铅锌矿床位于邵阳—郴州北西向成矿带。铅锌矿体产于硅化破碎带中,赋矿围岩为寒武系灰黑色钙质板岩、奥陶系粉砂质和硅质板岩。矿体围岩蚀变发育,以硅化、重晶石化与成矿关系最为密切。矿石呈半自形、他形粒状结构,块状、脉状构造,主要矿物为闪锌矿、方铅矿和黄铜矿。通过对矿区和矿床地质特征进行综合分析,推断其为中低温热液充填脉状铅锌矿床,本文总结了该矿床地层岩性、构造、褶皱和矿化蚀变找矿标志,为矿床今后找矿指明了方向。

The Qingshuitang lead-zinc deposit in Qidong County,Hunan Province is located in the Shaoyang-Chenzhou NW-trending metallogenic belt.The lead-zinc ore body is produced in the silicified fracture zone.The host rock is Cambrian gray-black calcareous slate and Ordovician powder sandy and siliceous slate.The surrounding rocks of the ore body have been altered,and the relationship between silicification,barite petrification and mineralization is the closest.The ore has a semi-automorphic,heteromorphic granular structure,massive and vein-like structure,and the main minerals are sphalerite,galena and chalcopyrite.Through a comprehensive analysis of the geological characteristics of the mining area and the deposit,it is inferred that the deposit originated from the mid-low temperature hydrothermal fluid filling the vein-like lead-zinc deposit.This article summarizes the stratum lithology,structure,folds and mineralization alteration prospecting signs,and points out the main prospecting direction of the mining area in the future.