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

中文关键词:  海相沉积  汞矿  电子探针显微分析技术  赋存状态  迁移转化

英文关键词:Sedimentary  Mercury ore  EPMA  Occurrence  Migration-transformation

中文摘要:

      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。

英文摘要:

      :Using the X-ray diffraction(XRD) and electron probe microanalysis(EPMA) to study the sedimentary 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.