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黄陵背斜中南部的月亮包金矿床赋存于三斗坪岩体英云闪长岩(794 Ma)中,矿体主要受北北西向次级断裂构造控制,矿床形成经历了成矿前金初步富集、热液成矿作用、金次生富集3个成矿作用过程。流体包裹体岩相学、热力学及拉曼光谱研究表明:成矿热液总体属中-低温、中-低盐度且含有有机质的H2O-NaC l-CO2(CH4)体系类型。通过研究并综合分析前人资料初步认为:脆-韧性复合剪切带为其控矿构造;岩浆是成矿物质的主要来源;基性岩墙群侵位引起的加热升温作用配合挤压向伸展转换过程中压力突然释放,是引起成矿流体沸腾和成矿的重要因素;丰富的H2O、CO2、CH4等挥发组分是该区成矿的有利条件。
The mid-southern Huangliang anticlinorite Moon-gold deposits occur in Sandouping granodiorite (794 Ma). The ore body is mainly controlled by the north-northwest-west subfault structure. Preliminary gold enrichment, hydrothermal mineralization, gold enrichment three mineralization process. Petrography, thermodynamics and Raman spectroscopy of fluid inclusions show that the mineralization hydrothermal fluids are of the medium-low temperature, medium-low salinity and organic matter-containing H2O-NaC l-CO2 (CH4) system. By studying and synthesizing the previous data, it is preliminarily thought that the brittle-ductile composite shear zone is its ore-controlling structure; the magma is the main source of ore-forming material; the heating and warming effect caused by emplacement of the basic dyke swarm together with the extrusion- The sudden release of pressure during the conversion process is an important factor causing the fluidization and mineralization of ore-forming fluids. The abundant volatile components such as H2O, CO2 and CH4 are the favorable conditions for metallogenesis in the area.