卫辉市大池山矿区重晶石矿床地质特征及成因

卫辉市大池山矿区是豫北重晶石矿主要的矿产地，位于太行山拱断束内。为了解该重晶石矿床的矿化特征和成因，本文对研究区前人研究成果、地质背景、矿区地质、围岩蚀变特征、矿化特征进行了研究，统计了33条重晶石矿体与构造的关系。研究指出，大池山重晶石矿主要赋存于下奥陶统和上寒武统的碳酸盐地层中，矿体的形态、规模和品位变化严格受断裂构造的控制，矿床类型属中、低温热液型脉状重晶石矿床。在此基础上对矿床成因进行了分析研究，含矿热液沿着NW、NE向断裂及其次级断裂向上运移，于中低温阶段在构造有利部位富集成矿。研究结果对本矿区的进一步勘查及类似地区的找矿工作具有一定的指导意义。

Geological characteristics and genesis analysis of barite deposit in Dachishan mining area of Weihui City

Dachishan mining area in Weihui City is the main mining area of barite in Northwest Henan Province, located in the arch fault belt of Taihang Mountain. In order to understand the mineralization characteristics and genesis of the barite ore, the previous research results, geological background, mining area geology, wall rock alteration characteristics and mineralization characteristics were studied, and the relationship between 33 barite ore bodies and structures was statistically analyzed. The study pointed out that the Dachishan barite ore mainly occurs in the carbonate strata of the lower Ordovician system and the upper Cambrian system, and the shape, scale and grade of the ore bodies are strictly controlled by the fault structure. The deposit type belongs to medium and low temperature hydrothermal vein barite deposit. On this basis, genesis of the deposit was studied. The ore bearing hydrothermal solution migrated upward along the NW and NE faults and their secondary faults, and enriched and mineralized in the favorable parts of the structure at the middle and low temperature stage. It has certain guiding significance for further exploration in this mining area and prospecting in similar areas.