钨在矿物/熔体和溶液/熔体中的分配行为及其对成矿作用的影响  

Partition Behaviors of Tungsten in Mineral/Melt and Solution/Melt Systems and Their Effects on Mineralization

作　　者：喻晓[1,2] 赵博[2] 张德会[2] 黄诚[2] 王新彦[2] 和成忠 

机构地区：[1]中国人民武装警察部队黄金第十二支队,成都611732 [2]中国地质大学(北京),北京100083

出　　处：《矿物岩石地球化学通报》2015年第3期646-653,共8页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金项目(41373048);国土资源部公益性行业科研专项(201411024)

摘　　要：总结了钨(W)在地球不同圈层、不同相以及不同集合体之间的分配行为,并据此来探讨与花岗岩有关的热液型钨矿床的某些成因机制,并将W矿化所需的较高的浓集系数归因于这一系列不均匀分配行为的累积。同时强调了W在溶液/熔体体系,尤其是富F体系中的分配行为是理解其成矿机理的关键。热液中W主要以钨酸(根)和碱性钨酸盐离子存在,后因流经理化条件(温度、盐度、p H值)骤变而沉淀成矿。In order to explore the mineralization mechanism of hydrothermal tungsten deposits,this paper summarized the partition behaviors of tungsten among different layers,different phases and different aggregates. The rather high concentration coefficient of tungsten mineralization was considered as the result from a series of non-uniform partitioning accumulations. The partition behavior of tungsten in the solution/melt system,especially in the F-rich fluidic system,was emphasized as the key in understanding its mineralization mechanism. Tungsten tends to be transported as simple tungstate or alkali-tungstate ion,and precipitates to form hydrothermal tungsten deposits when physical and chemical conditions,such as temperature,pressure and p H,change abruptly.

关 键 词：分配系数 溶解度 W 成矿 影响因素 

分 类 号：P618.67[天文地球—矿床学]