湘中白马山地区金矿成矿模式与找矿方向探讨

    Discussion on metallogenic model and prospecting direction of gold deposits in the Baimashan Area of central Hunan

    • 摘要: 白马山地区位于雪峰弧形构造带中段,是湖南最重要的金矿成矿区之一,成矿条件优越,矿产资源潜力巨大。金矿围绕白马山复式岩体广泛分布,主要为内生热液金矿,代表性的有铲子坪金矿、杏枫山金矿、古台山金矿等,这些矿山经过多年开采,存量资源枯竭风险加剧。本文在研究地质背景的基础上,聚焦矿床地质特征,系统总结了白马山地区“地层-构造-岩浆岩三位一体”成矿模式,为下一步矿产勘探与开发提供了方向,未来应重点关注两个方面:白马山岩体周边长安组地层中NW向压扭性断裂控制的破碎带蚀变岩型金矿,以规模大、矿化连续性好为特征,适于规模化开发;古台山金矿-白竹坪金矿一线近SN向张性-张扭性断裂控制的石英脉型金矿,以高品位、产明金为优势,更适合小型开采。

       

      Abstract: The Baimashan Area, located in the middle section of the Xuefeng Arc-shaped Structural Belt, represents one of the most significant gold metallogenic provinces in Hunan Province, characterized by favorable metallogenic conditions and substantial mineral resource potential. Gold deposits are widely distributed around Baimashan granitic complex, predominantly occurring as endogenous hydrothermal deposits. The Chanzigping gold deposit, Xingfengshan gold deposit, and the Gutaishan gold deposit are representative examples in this area. However, over-exploitation has led to a gradual depletion of available resources. Based on the analysis of the regional geological background, this study focuses on the geological characteristics of the deposit, systematically summarizes the trinity of mineralization model of “stratigraphy-structure-magmatic rock” in the Baimashan Area. The direction of the subsequent exploration work is clearly indicated by this study. In future mineral exploration and mining work, priority should be given to the following two aspects. Firstly, the fracture-altered-rock-type gold deposits located within the fracture zone of the Changan Formation strata surrounding the Baimashan rock mass are controlled by NW-trending compression-torsion faults. These deposits are characterized by large-scale occurrence and continuous mineralization, suggesting great potential for large-scale exploitation. Secondly, the quartz vein-type gold deposits, controlled by the near SN-trending tension and tension-torsion fault along the Gutaishan-Baizhuping gold deposits line, are characterized by high grades and the predominance of visible gold, causing them to be better suited for small-scale mining operations.

       

    /

    返回文章
    返回