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本文探讨了哀牢山金矿带内元阳县大坪金矿床成矿热液系统的发生及其演化过程。认为该矿床成矿热液系统是在一定的物理化学和造山带构造条件下，岩浆热液和被加热的地下水混合成改造热液，改造了矿源岩──晋宁期闪长岩，被活化的成矿物质和岩浆热液携带的矿质在一定的物理化学场中迁移、沉淀富集成矿的。矿床属典型的改造热液型矿床。其成矿作用大致经历了早期矿源岩→晚期岩浆热液活动→改造热液使矿质活化迁移→改造富集成矿的过程。所以此矿床的成矿物质来源、水源和热源是多源的，成矿是多阶段的。
This paper explores the occurrence and evolution of the ore-forming hydrothermal system in the Daping gold deposit in the Yuanyanshan gold belt. It is considered that the ore-forming hydrothermal system of this deposit is a mixture of magmatic hydrothermal fluid and heated groundwater that is transformed into hydrothermal fluids under the conditions of certain physicochemical and orogenic belt alteration, and that the source rock, Jinning, diorite, is activated and activated Of the ore-forming materials and minerals carried by magmatic hydrothermal migration in a certain physicochemical field, sedimentation and enrichment of mineralization. Deposit is a typical transformation of hydrothermal deposits. Its metallogenic process generally experienced the process of early source rock → late magmatic hydrothermal activity → alteration of hydrothermal fluids to activate mineral migration → enrich enrichment of mineralization. Therefore, the metallogenic source, water source and heat source of this deposit are multi-sourced, and the ore-forming is multi-stage.