锡矿山锑矿稳定同位素地球化学研究

通过氢、氧、碳、硫、硅、铅等稳定同位素和矿物包裹体地球化学的研究,指出锡矿山锑矿成矿温度中－低温（１５０～２５０℃）,成矿流体主要来源于大气降水,为盐度较低贫硫富氯的偏碱性流体。成矿物质主要来自前泥盆纪地层。矿床属大气降水低温热液型矿床。     

湘中锑矿深源流体的地幔柱成矿演化

深源流体在地幔柱热驱动下，历经长期壳幔循环，形成高浓度古水热成矿流体，为湘中锑的成矿蓄积丰沛的矿源。     

地电化学（泡塑）样品中金与锑的预处理

通过模拟实验获得附载金、锑的泡塑样品，并对其进行了硫脲解脱法、灰化法、硝酸加氧化剂消解法的比较实验，确定采用硫脲解脱法是地电化学(泡塑)样品金、锑的最佳解脱方法，通过正交实验及其结果分析确定了最佳实验条件。利用硫脲解脱一原子吸收光谱法对某隐伏金锑矿床82件地电化学(泡塑)样品进行了测试，分析结果显示出有明显的金、锑异常，指示了重要的勘探靶区。     

桂北前寒武纪浅变质细碎屑岩型锑矿地质特征及成因

桂北隆起区锑矿主要为产于前寒武纪浅变质细碎屑岩中的碎裂岩—石英脉型锑矿床 ,其成因与地下热水渗滤作用有关。其矿源来自于上地壳围岩 ,水源以大气降水为主、部分混染有变质水 ,硫源较复杂、具混合硫特征 ,热源由隐伏岩体、放射性元素和断裂磨擦提供。成矿流体为富含 CO2的 Na - K - Ca2 - SO42 -- Cl-型水溶液 ,成矿温度以 2 1 0～ 2 4 0℃为主 ,压力 1 0～ 38MPa,成矿时代为燕山期     

常压密闭微波消解-电感耦合等离子体发射光谱法测定锑矿石中的锑

采用王水溶解锑矿石常出现溶矿不彻底、提取过程中锑水解的问题,导致测定结果偏低;虽然原子荧光光谱法广泛应用于锑的测定,但是该方法由于仪器线性范围窄,对于高含量锑(5%)的测定容易引入较大稀释误差。本文对样品采用氢氟酸-硝酸-盐酸混合酸溶后,在提取过程中加入酒石酸与锑络合,充分抑制了锑的水解。实验结果表明:采用氢氟酸、硝酸、盐酸混合酸体系的溶矿方式,能够有效分解矿石中的硅酸盐组分,使溶解更加彻底,锑的测定结果优于王水溶矿,且检出限更低(1.10μg/g);通过酒石酸与锑的络合及盐酸对锑水解的抑制,锑的测定结果优于王水介质及盐酸介质的结果,且方法精密度(RSD,n=6)为0.11%～1.11%,较其他介质更稳定。在ICP-OES分析中通过对锑元素分析谱线的优选,可以获得更宽的线性范围,从而实现了对较高含量锑的准确测定。本方法能快速、有效溶解锑矿石并避免锑元素水解,经国家一级标物验证,所得结果与认定值相符,适用于分析锑矿石中含量范围在0.7%～40%的锑。     

Antimony in hydrothermal processes: solubility, conditions of transfer, and metal-bearing capacity of solutions

Based on data on the composition of ore-bearing hydrothermal solutions and parameters of ore-forming processes at various antimony and antimony-bearing deposits, which were obtained in studies of fluid inclusions in ore minerals, we investigated the behavior of Sb(III) in the system Sb–Cl–H₂S–H₂O describing the formation of these deposits.

We also performed thermodynamic modeling of native-antimony and stibnite dissolution in sulfide (m_HS⁻ = 0.0001−0.1) and chloride (m_Cl⁻ = 0.1−5) solutions and the joint dissolution of Sb_(s)⁰ and Sb₂S_3(s) in sulfide-chloride solution (m_HS⁻ = 0.01; m_Cl⁻ = 1) depending on Eh, pH, and temperature. All thermodynamic calculations were carried out using the Chiller computer program. Under the above conditions, stibnite precipitates in acid, weakly acid to neutral, and medium redox solutions, whereas native antimony precipitates before stibnite under more reducing conditions in neutral to alkaline solutions.

The metal-bearing capacity of hydrothermal solutions (200–250 °C) of different compositions and origins has been predicted. We have established that the highest capacity is specific for acid (pH = 2–3) high-chloride solutions poor in sulfide sulfur and alkaline (pH = 7–8) low-chloride low-sulfide solutions.     

Antimony in the environment: A review focused on natural waters. III. Microbiota relevant interactions

Antimony is ubiquitously present in the environment as a result of natural processes and human activities. Antimony is not considered to be an essential element for plants or animals. In this third review paper on the occurrence of antimony in natural waters, the interactions of antimony with microbiota are discussed in relation to its fate in natural waters. This paper covers the following aspects: occurrence in microbiota, uptake transport mechanisms, pathways of Sb(III) removal from cells involved in antimony tolerance, oxidation and reduction of antimony by living organisms, phytochelatin induction and biomethylation. This review is based on a careful and systematic examination of a comprehensive collection of papers on the above mentioned aspects of the subject. All data are quoted from the original sources. Relatively little existing information falls within the strict scope of this review and, when relevant, discussion on the interactions of antimony with reference microorganisms, such as Escherichia coli, Saccharomyces cerevisiae and different protozoan parasites of the genus Leishmania, has been included.     

湖南东安锑矿构造应力场的演化与成矿分析

文章通过对东安锑矿区的共轭节理进行统计分析,结合矿区地质特征和区域构造演化历史,确定了矿区构造应力场演化和构造控矿特征。矿区构造应力场可以划分为五期。第一期为加里东期近SN向挤压,形成牛头寨NE向基底褶皱和同期NE-NNE向断裂,以及近SN向F_1断裂的雏形。第二期为印支期近EW向水平挤压,共轭节理为NE和NNW向,形成了以近SN向的牛头寨复式背斜和区域性F_1断裂为主体的构造格架,以及小牛头寨NW向断裂和继承早期NNE向断裂发育的断裂构造。第三期为燕山早期近SN向水平挤压,共轭节理为NE和NW向;F_1、NNE向断裂整体处于挤压状态。前述三期构造形成了矿区近SN向构造骨架,以及配套的断裂、节理等成矿前构造。第四期为燕山晚期NW-SE向伸展,共轭节理为NE和NWW向;NE向组继承前期节理;F_1、NNE、NNW、NW向断裂此时成为矿液运移通道和容矿场所。第五期构造变形发生在第四纪,为NW-SE向水平挤压,共轭剪节理为NWW和NNW向;此期断裂为成矿后断裂,它们错断矿脉、矿脉被抬升剥蚀后出露地表。     

锑污染土壤环境风险评价研究

综合《场地环境评价导则》与美国超级基金法案的风险评价导则中环境风险评价的方法和要求,以武汉某化工厂污染场地为例,探讨土壤中锑的环境风险评价方法;并从人体健康评价与生态风险评价出发,就经口摄入、皮肤接触、呼吸吸入锑污染物对成人和儿童进行健康风险定量计算,并评价锑污染物的生态风险。结果表明：该废弃场地内污染土壤虽然不属于危险废物,土壤中有机物和大部分重金属含量均处于相应标准限制以下,但部分区域锑含量偏高,最高质量分数达到1 262.7×10-6,66%的土壤样品锑质量分数大于推荐修复值26×10-6;污染土壤的非致癌风险非常大;污染土壤对生物具有一定的生态毒理学影响,场地土壤须进行修复后才能使用。