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贵州西南部灰家堡金矿田金成矿规律研究综述

Overview of study on gold mineralization law in Huijiabao Gold Field in Southwestern Guizhou Province

  • 摘要: 灰家堡金矿田位于滇黔桂“金三角”成矿带核心区域,是中国南方重要的卡林型金矿产地。综合分析了该矿田近年来在成矿理论、成矿物质来源、控矿构造、成矿流体特征及隐伏矿床找矿技术等方面的研究进展,系统总结了其多层次构造滑脱成矿系统的构建及构造蚀变体(SBT)在成矿过程中的关键作用。研究表明,成矿控矿体系以灰家堡背斜为主,兼具逆断裂,构造蚀变体作为成矿流体运移与孕矿通道,控制了矿体的空间分布及赋存类型。成矿物质来源展现多源性特征,既有深部岩浆热液贡献,也涉及盆地沉积热液及有机质作用。成矿流体呈中低温、高压,富含CH4、N2、CO2等组分,Au以AuHS络合物迁移为主。近年来,深部找矿技术集成多学科方法,有效识别隐伏断裂体系和构造蚀变体,推动了深部隐伏矿床的发现与预测。现阶段仍存在成矿物质贡献定量评估不足、成矿动力学机理解析不够深入及隐伏断裂系统识别研究较浅等科学挑战。未来研究方向建议聚焦多系统耦合成矿机制、构造蚀变体精细划分及成矿流体演化动力学,强化地球化学与地球物理技术融合,推动深部隐伏矿床找矿理论与方法体系的创新发展,以保障该矿田及类似成矿区的矿产资源可持续开发。

     

    Abstract: The Huijiabao Gold Field is located in the core area of the "Golden Triangle" metallogenic belt in Yunnan−Guizhou−Guangxi and is an important Carlin-type gold deposit in southern China. Through a comprehensive analysis of the research progress in recent years on metallogenic theory, metallogenic material sources, ore-controlling structures, characteristics of metallogenic fluids, and prospecting techniques for concealed deposits in this ore field, the construction of its multi-level tectonic detachment metallogenic system and the key role of structural alteration bodies (SBT) in the metallogenic process were systematically summarized. The study indicates that the metallogenic and ore-controlling system is dominated by the Huijiabao Anticline, with the addition of reverse faults. The SBTs serve as channels for the migration and mineralization of metallogenic fluids, controlling the spatial distribution and occurrence types of ore bodies. The sources of metallogenic materials exhibit multi-source characteristics, including contributions from deep magmatic hydrothermal fluids, basin sedimentary hydrothermal fluids, and organic matter. The metallogenic fluids are characterized by moderate to low temperatures and high pressures, rich in components such as CH4, N2, and CO2, with Au primarily migrating as AuHS complexes. In recent years, the integration of deep ore-prospecting techniques with multidisciplinary methods has effectively identified concealed fault systems and SBTs, promoting the discovery and prediction of deep concealed deposits. Currently, there are still scientific challenges such as insufficient quantitative assessment of metallogenic material contributions, insufficiently deep analysis of metallogenic dynamics mechanisms, and identification of concealed fault systems. Future research directions are suggested to focus on the coupling of multi-system metallogenic mechanisms, fine division of SBTs, and metallogenic fluid evolution dynamics, strengthening the integration of geochemical and geophysical techniques,and promoting the innovative development of deep concealed deposit prospecting theories and methodologies, so as to ensure the sustainable development of mineral resources in this ore field and similar metallogenic areas.

     

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