论文部分内容阅读
对黔西南和桂西北微细浸染型金矿床围岩、矿石和热液硅化石英的硅同位素组成及硅质阴极发光特征的研究发现，原生硅化石英不发光，而围岩中的石英和次生硅化石英明显发光；与此对应，围岩中石英的硅同位素组成与矿石和热液硅化石英的硅同位素组成也可以明显分开。从硅同位素动力学分馏原理分析论证了原生成矿硅质流体在沿深大断裂主通道由深至浅快速运移时，沿途进入次级断裂分别向不同的有利于赋矿的地层渗透交代而成矿的地球化学过程。由此为该类型金矿的成矿物质主要来源于深部提供了重要依据，并揭示了该类型金矿具深部找矿远景及形成大型和超大型矿床的地球化学背景。
The study on the silicon isotope compositions of silt, ore and hydrothermal silicified quartz in the finely disseminated gold deposits in the southwest and northwestern Guizhou Province and their siliceous cathodoluminescence revealed that the native silicified quartz did not emit light and the quartz and secondary silicification in the surrounding rock Correspondingly, the quartz isotopic composition of quartz in the surrounding rocks can also be obviously separated from the silicon isotopic composition of the ore and hydrothermal silicified quartz. Based on the analysis of silicon isotope kinetics, it is demonstrated that the primary ore-forming siliceous fluids are infiltrated by different strata that are favorable to ore-bearing when entering the secondary faults along the main channel along the deep fault from deep to shallow. Geochemical process of mineralization. Therefore, the ore-forming materials of this type of gold mine mainly come from the deep and provide an important basis and reveal the geochemical background of deep prospecting of this type of gold deposit and the formation of large-scale and super-large deposits.