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金山剪切带型金矿床主要发育含金硅质糜棱岩和合金石英脉两类矿石,它们分别在矿化第一和第二阶段形成。含金硅质糜棱岩与围岩一双桥山群上亚群具有一致的稀土和微量元素分布特征及相近的元素比值,后者为矿床第一阶段矿化的形成提供了物质来源。含金石英脉中流体包裹体的化学和同位素组成特征表明,矿化第二阶段的成矿流体为源于大气降水的地下热水,引起自然金沉淀的因素主要是流体的相分离。
The Jinshan shear zone type gold deposit is mainly composed of two types of gold-bearing siliceous mylonites and alloy quartz veins, which are respectively formed in the first and second stages of mineralization. The gold-bearing siliceous mylonites and the surrounding rocks-Shuangqiaoshan Group have the same REE and trace element distribution and similar elemental ratios, and the latter provides the material source for the formation of the first stage mineralization. The chemical and isotopic compositions of fluid inclusions in gold-bearing quartz veins indicate that the second stage of ore-forming fluid is underground hot water derived from atmospheric precipitation, and the major factor causing precipitation of natural gold is the phase separation of fluids.