云南新山金矿地层特征及其与成矿关系的研究

云南东川新山金矿受制于复杂的地貌条件和地质构造格局，地层层位及展布特征等存在疑问，尤其是对金矿床赋存层位及其控矿作用缺乏清晰认识。通过金矿带近矿围岩重要地段地质剖面及地质地球化学剖面、岩矿鉴定及测试分析等工作，认为新山金矿区金矿带内前人所认定的黑山组和落雪组实际上是平顶山组钙质板岩、粉砂质板岩、白云石化变砂岩和重结晶砂质灰岩。通过区域含矿层位对比、地层含矿性特征和岩石物理化学性质等研究论证了地层（包括层位和岩性组构）与金矿成矿的密切关系：平顶山组中上部及因民组下部层位是金矿化的主要赋矿层位，同时也是金矿床成矿物质的重要来源。新山金矿地层与成矿研究结果对该区进一步找矿具有重要的指导意义。

Formation Characteristics and Its Relation to Mineralization of Xinshan Gold Deposit in Yunnan Province

Subjected to complex topographic condition and geological tectonic pattern，stratigraphic division，distribution and correlation with gold mineralization were in hot debate in Xinshan gold deposit of Yunnan Province Dongchuan area.The previously established Heishan formation and Luoxue formation dolomite in the gold belt of Xinshan mining area，is actually Pingdingshan group dolomitiztion altered sandstone，recrystallized sandy limestone，calcareous slate and silty slate，upon the foundation of geological section，geological and geochemical profile，rock-mineral identification and test analysis in the vicinity of the gold mineralizing belt.Through the following evidence demonstrated that formation （including stratigraphic and lithologic formations） is closely related to the mineralization of gold deposits：analysis of the ore bearing strata，clustering analysis of metallogenic elements，comparison of ore bearing properties of regional strata，ore bearing characteristics of strata，physical and chemical properties of rocks.The middle-upper horizons of Pingdingshan Group and the lower horizon of the Yinmin Group are the main ore bearing layer of gold mineralization，and they are also important suppliers of ore-forming material of Xinshan gold deposits.The study of the relationship between strata and mineralization has an important guiding significance for futher prospecting in Xinshan gold deposit.