贵州海相沉积汞矿特征及汞的迁移转化规律研究  

Sedimentary Characteristics and Migration-transformation Laws of the Mercury Ore Marine Deposit in Guizhou Province

作　　者：卢大磊[1] 陈肖虎[1] 

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550025

出　　处：《盐湖研究》2014年第1期21-26,共6页Journal of Salt Lake Research

摘　　要：采用X射线衍射(XRD)和电子探针显微分析技术(EPMA)对海相沉积汞矿特征进行了研究,分析了汞的迁移转化规律。表征结果表明,矿石类型包括白云石、方解石、钼钨钙矿、朱砂矿、钙钼矿和少量的钋矿;矿石结构致密,呈包裹和裂隙状态;汞主要以氧化矿为主,还有微量的单质汞,含量约为0.15%(以Hg计)。水和土壤环境中的汞易被各种配位体、有机质、无机颗粒物以及粘土矿等吸附形成有机汞(如甲基汞),一部分汞以气态形式进入大气。Using the X-ray diffraction （XRD） and electron probe microanalysis （EPMA） to study the sedi- mentary characteristics of mercury ore, analyzing the law of mercury migration-transformation. Characterizations show that ore types consist of dolomite, calcite, powellite, cinnabar, calcium molybdate and a small amount of polonium; the mercury ore has compact structure and takes on bundled and fissured state; mercury is dominated by oxidized ores with the addition of trace amounts of elemental mercury, whose content is 0. 15 % （by the mercury）approximately. A series of ligands, organic substances, inorganic particulate matters and clay minerals absorb mercury from the water and soil environments so as to formulate organic mercury （as methyl mercury）, a portion of mercury turn into the atmosphere.

关 键 词：海相沉积 汞矿 电子探针显微分析技术 赋存状态 迁移转化 

分 类 号：P618.68[天文地球—矿床学]