新疆东天山典型金矿床成矿物质来源探讨  

Origin of minerogenetic substance for typical gold deposits in east Tianshan, Xinjiang

作　　者：邵铁全[1] 刘云焕[2] 席先武[1] 谢星[1] 杨兴科[2] 

机构地区：[1]长安大学地质工程与测绘工程学院 [2]长安大学地球科学与国土资源学院,陕西西安710054

出　　处：《西安科技大学学报》2005年第2期175-178,共4页Journal of Xi’an University of Science and Technology

基　　金：中国地调局地质矿产调查项目[19991020008023]

摘　　要：作者根据对新疆东天山典型金矿床的沉淀成矿环境、地球化学特征、稳定同位素特征等的系统分析和研究,论证了形成金矿床的硅质流体最初是一种以水为主要溶剂,以溶解态、胶体态氧化硅为主要溶质的高温高压(超临界态)溶液,其来源于地幔,是一种溶解了大量SiO2的地幔流体。而成矿元素主要来源于硅质流体上升运移过程中所经围岩,以致成矿物质来源具异源性。According to the systems analysis and study of the minerogenetic surroundings, the geochemical characteristic, the stable isotope characteristic and so on for the typical gold deposits in East Tianshan, authors argue that the silicic fluid forming gold deposit is a kind of high temperature and high pressure (super-critical-state) solution, which contain abundant volatilizable components, take water as main solvent take dissolvable and colloid silica as main solute. It root in the mantle and is a kind of mantle fluid, which dissolve abundant silica. But the ore-forming elements mainly come from the wall rock through which the silicic fluid passes in the process of its move. So then the origin of the ore-forming substance has the feature of different root. There is very important significance for the study of the ore-forming mechanism and genesis of the gold deposit.

关 键 词：成矿物质来源 东天山 新疆 地球化学特征 同位素特征 内生金矿床 成矿环境 系统分析 超临界态 高温高压 地幔流体 SiO2 运移过程 成矿元素 成矿机制 溶解态 氧化硅 异源性 硅质 上升 成因 

分 类 号：P618.510.4[天文地球—矿床学] P618.41[天文地球—地质学]