豫西小池沟金矿矿床地质特征研究

豫西洛宁县小池沟金矿资源丰富.本文在研究区前人区域地质、矿产地质工作的基础上,开展野外地质调查并采集样品测试分析,进行矿体特征、矿石质量、矿石结构与构造、金矿化特征、围岩蚀变和成矿阶段等研究,分析矿床主控因素和找矿标志,探讨矿床成因.研究结果表明:金矿区圈定6个矿体,各构造蚀变带控制的金矿体沿矿体走向呈串珠状产出,矿石...

Geological characteristics of Xiaochigou gold deposit in western Henan

Xiaochigou deposit is rich of gold resources in Luoning County,west of Henan Province Based on the previous regional geological and mineral geological work, eld geological survey and samples test and analysis were carried out in this paper,the orebody characteristics,ore quality and ore structure and texture,gold mineralization features,wall-rock alteration and mineralization stages were also studied,in order to analyze the main controlling factors and prospecting marks of the deposits The results show that there are six ore bodies delineated in this area The gold ore bodies controlled by various structural alteration zones occur as beads along the strike There is a positive correlation between gold and pyrite and galena in the ore There are four types of ore mineral association The vein-like gold ore bodies in Xiaochigou gold deposit are mainly tectonic alteration rock type The main alteration type of surrounding rock is silicification,potassium,pyritization, chloritization and epidotization The mineralization process can be divided into three stages,the rst stage of mineralization happened under north-south compression,the second stage mineralization took place in the background of tension (torsion),and the third stage mineralization alteration caused by atmospheric precipitation cycle under the background of continuous crustal uplift The main ore controlling factors are structures,basement rock series and Yanshanian granites The genetic type of the deposit is medium-low temperature hydrothermal gold deposit