【摘要】 金山金矿属韧性剪切型金矿床，矿床规模大，矿区发育有一套完整的糜棱岩带，在糜棱岩化过程中伴有流体相的参与。根据Ｇｒｅｓｅｎｓ的成分－体积关系式所获得的计算结果表明：ＳｉＯ＿２、ＦｅＯ随着糜棱岩化程度加强而带入量增加，在地质上表现为硅化、黄铁矿化加强；Ｎａ＿２Ｏ与Ｋ＿２Ｏ表现出相反的迁移趋势，即随着糜棱岩化程度加强，Ｎａ＿２Ｏ迁入量增加，而Ｋ＿２Ｏ迂出量增加；ＣａＯ与ＳｉＯ＿２有着基本一致的变化趋势；ＭｎＯ、ＭｇＯ、Ａｌ＿２Ｏ＿３、Ｐ＿２Ｏ＿５、ＴｉＯ＿２为弱迁移组分。糜棱岩化过程中的水岩比（Ｗ／Ｒ）约为１∶０．０１３，并有大量外来水的加入。分析结果显示，Ａｕ矿化与硅化中心一致。进一步的定量计算表明，韧性剪切过程中，Ａｕ从围岩中淋失，并与外来流体所携带的Ａｕ一起，在剪切中心带富集。更多还原

【Abstract】 Witli a well-developed mylonite zone in the ore district, the Jinshan gold doposit is a large-sized deposit of ductile shear zone type. The mylonitization was accompanied by the addition of fluid phase. Calculations based on Grosens’component-volume equation show that,wit the intensification of mylonitization,increasing amounts of SiO₂ and FeO are brought in,which is geologically expressed as intensified silicification and pyritization. Na₂O and K₂O exhibit the opposite trend , i.e.,with the intensification of mylonithzzation,more Na_O is brought in,accompa nied by the taking-out of more K₂O.CaO and SiO₂ have basically similar variation trend, whereas MnO,MgO,Al₂O₃, P₂O₅ and TiO₂ are weakly migrating components. Theratio of wator to rock（W/R）in the process of mylonitization is some 1∶0.013,with the addi tion of significant amounts of externa 1 water. Analyses show that gold mineralization coincides with the silicification center. Further quantitative calculations demonstrate that during the ductile shearing,gold was leached out of the wall rocks and then concentrated in the central part of the Shear zone together with gold carried by the external flulds.更多还原