导电涂料性能的研究

实验研究几种基料配比和不同导电填料（ 铜或石墨） 在导电性能方面的差异,探讨了导电涂料的导电机理,并研究了不同石墨粒径对涂层导电率的影响。     

湘西花垣李梅铅锌矿床C、O、S、Pb同位素特征及成矿物质来源

李梅铅锌矿床位于扬子地块的东南缘,是湘西-鄂西成矿带花垣矿田中较早发现的超大型铅锌矿床之一,矿体呈层状、似层状产于寒武系清虚洞组藻灰岩中。文章通过对其进行C、O、S、Pb同位素地球化学及流体包裹体激光拉曼的研究,探讨了成矿流体和成矿物质的来源及演化。研究结果表明:成矿期热液方解石的δ~(13)CPDB为-2.79‰~1.11‰,δ~(18)OSMOW为14.59‰~23.05‰,表明成矿流体中的CO_2主要来自于寒武系碳酸盐岩的溶解,部分成矿期及成矿后的热液方解石与有机质的热化学还原作用有关。激光拉曼研究显示包裹体气相成分中含大量的CH_4、H_2S、N_2及其他烃类,推测已经演化到高成熟阶段的有机质可能以古油气藏的形式参与了成矿作用,闪锌矿中气态含碳质沥青包裹体的出现暗示有机质的热化学还原反应参与了铅锌成矿过程。矿石中硫化物的δ~(34)SCDT值为+26.30‰~+34.66‰,平均值为+30.52‰,表明还原S主要来自成矿流体中海水硫酸盐充分的热化学还原作用。矿石硫化物的Pb同位素组成变化范围较小,~(206)Pb/~(204)Pb、~(207)Pb/~(204)Pb、~(208)Pb/~(204)Pb分别为17.999~18.235、15.584~15.789、38.147~38.576,推测成矿物质主要来源于元古界浅变质基底板溪群和寒武系下统牛蹄塘组黑色页岩,部分来自于清虚洞组赋矿围岩。     

泥浆对钻头WC基胎体材料冲蚀磨损的试验研究

采用双喷嘴闭路循环试验装置,测试了钻头胎体材料在泥浆冲蚀作用下所产生的总质量损失TML和由纯机械冲刷作用所产生的质量损失E。通过计算得到了由腐蚀及机械冲刷与腐蚀相互作用所产生的质量损失C+S。结果表明,钻头胎体材料的冲蚀磨损不是纯由机械冲刷作用引起,而是由机械冲刷、腐蚀及他们的相互作用共同引起。因此,在有腐蚀性的泥浆中设计和选用PDC (金刚石复合片)钻头时,除了考虑胎体材料的抗冲刷磨损性能外,还应考虑钻头胎体材料的抗腐蚀性。      

山东焦家金矿矿床成因及成矿模式

胶东矿集区是我国金矿资源的主要密集区,重点解剖焦家金矿有助于深化对区域同类矿床的成因认识.文章从矿床地质、矿床地球化学、稀土元素地球化学、同位素地球化学、成矿流体以及成矿构造环境等几个方面对该矿床进行了研究,在上述的基础上探讨了焦家金矿的矿床成因模式,认为华北板块与华南板块碰撞的后造山作用引起的构造转折,导致地壳拉张,深部物质上涌,在有利的部位大规模成矿.     

城市热岛时空特征及其影响因素

城市热岛强度呈周期性和非周期性交叉性时间变化,水平分布呈现单中心式、多中心、条状、辐射状、格网状等多种格局形式,同时具有明显的立体空间分布特征。城市热岛的形成原因及影响因素诸多,主要归纳为人为热量释放、下垫面性质和结构、植被减少、大气污染、城市格局、天气状况等。     

豫西沙沟脉状Ag-Pb-Zn矿床地质特征和成矿流体研究

豫西沙沟薄脉状Ag-Pb-Zn硫化物矿床位于华北陆块南缘熊耳山地区,主要由多金属硫化物-石英-碳酸盐脉型和石英-碳酸盐-绢云母-多金属硫化物蚀变岩型两种矿化类型组成。主要矿脉的矿物共生序列可以分为成矿前的石英-黄铁矿阶段(Ⅰ)、闪锌矿-石英-方铅矿-少量银矿物阶段(Ⅱ1)、方铅矿-石英-闪锌矿-含铁白云石-银矿物阶段(Ⅱ2)和成矿后的方解石-(石英)阶段(Ⅲ)。对不同阶段的成矿流体研究表明,石英-黄铁矿阶段(Ⅰ)中的含氯化钠子晶三相(LVH)包裹体(Ⅰ1)可能是直接从饱和水的结晶岩浆熔体中出溶形成或是由岩浆流体的减压沸腾形成,显示该区很可能存在岩浆流体端元。多金属硫化物阶段(Ⅱ1Ⅱ2)捕获富液相包裹体(LV型)和个别CO2包裹体(C型),这两个阶段流体包裹体反映了主成矿阶段流体的基本特征,结合包裹体气相和液相成分色谱分析以及包裹体初融温度,认为成矿流体应该为中-低温低盐度含CO2的H2O-NaCl体系。其中,阶段(Ⅱ2)的均一温度(145～288℃,平均为194℃)比阶段(Ⅱ1)的均一温度(185～357℃,平均240℃)低46℃;同时,阶段(Ⅱ2)的盐度(1.91%～10.86%,平均6.38%)较阶段(Ⅱ1)盐度(4.65%～10.11%,平均7.77%)略低。对这一温度和盐度的总体下降趋势的合理解释是大气水的逐渐混入。多金属硫化物阶段(Ⅱ1Ⅱ2)之后的方解石-(石英)阶段普遍为富液相包裹体(LV型),该阶段显著降低的温度(129～208℃,平均165℃)和盐度(1.40%～4.03%,平均2.50%),进一步佐证大气水的不断混入。而且,流体混合可能在引起矿石矿物从热液中沉淀方面起到重要作用。     

Determination of Reference Values for NIST SRM 610–617 Glasses Following ISO Guidelines

We present new reference values for the NIST SRM 610–617 glasses following ISO guidelines and the International Association of Geoanalysts’ protocol. Uncertainties at the 95% confidence level (CL) have been determined for bulk‐ and micro‐analytical purposes. In contrast to former compilation procedures, this approach delivers data that consider present‐day requirements of data quality. New analytical data and the nearly complete data set of the GeoReM database were used for this study. Data quality was checked by the application of the Horwitz function and by a careful investigation of analytical procedures. We have determined quantitatively possible element inhomogeneities using different test portion masses of 1, 0.1 and 0.02 μg. Although avoiding the rim region of the glass wafers, we found moderate inhomogeneities of several chalcophile/siderophile elements and gross inhomogeneities of Ni, Se, Pd and Pt at small test portion masses. The extent of inhomogeneity was included in the determination of uncertainties. While the new reference values agree with the NIST certified values with the one exception of Mn in SRM 610, they typically differ by as much as 10% from the Pearce et al. (1997) values in current use. In a few cases (P, S, Cl, Ta, Re) the discrepancies are even higher.     

金属矿物材料在废水处理中的应用

从环境矿物学角度，对金属矿物材料(铁氧化物与氢氧化物、锰氧化物和氢氧化物、铁硫化物)在废水处理中的应用现状进行了综述，分析金属矿物材料在水环境保护方面存在的问题，并对其应用前景进行展望。     

New Thorium Isotope Ratio Measurements in Silicate Reference Materials: A‐THO,AGV‐2, BCR‐2, BE‐N,BHVO‐2 and BIR‐1

A two‐step Th isolation protocol, involving micro‐columns of TRU‐Spec extraction chromatography material and AG1 resin, was evaluated. The MC‐ICP‐MS procedure included ²³²Th tailing characterisation and correction, and calibrator bracketing using an in‐house standard solution (ThS1) to correct for instrumental mass bias and Faraday cup to secondary electron multiplier relative gain. Repeated analyses of reference solutions (UCSC Th ‘A’, WUN, OU Th ‘U’, IRMM‐36) were consistent with published data. Six reference materials (A‐THO, BCR‐2, AGV‐2, BHVO‐2, BE‐N and BIR‐1) were processed. The average ²³⁰Th/²³²Th values obtained for these samples are in excellent agreement with published data. In addition, we report the first ²³⁰Th/²³²Th values for BE‐N and BIR‐1. The intermediate precisions for rock samples ranged from ± 0.24 to ± 0.49% (2 RSD) and were similar to those achieved for synthetic solutions, thereby supporting the overall validity of the chemical separation, data acquisition and reduction procedures. Counting statistics on the ²³⁰Th isotope was the most significant source of uncertainty. The intermediate precision of the mean ²³⁰Th/²³²Th for the Th‐depleted BIR‐1 (5.64 × 10^?6 ± 0.27%, 2 RSD) is in the range of the analyses of other reference materials analysed in this study.     

The C-O and Zn isotopic compositions of the Laochang Ag-Pb-Zn ore bodies in the Changning-Menglian suture zone,and its geological implicationsSCIEI北大核心CSCD

老厂矿床是昌宁-孟连缝合带内唯一大型矿床,本文报道了老厂矿床Ag-Pb-Zn矿体中Ⅰ号矿体群下部块状矿体和上部网脉状矿体的方解石C-O同位素组成,以及Ⅰ、Ⅱ、Ⅳ三个矿体群内闪锌矿的Zn同位素组成。Ⅰ号矿体群下部块状矿体和上部网脉状矿体方解石δ¹³C_PDB的范围分别为-6.17‰～2.71‰和-2.18‰～3.87‰,δ¹⁸O_PDB的范围分别为-19.57‰～-17.23‰和-22.10‰～-16.21‰;计算获得对应成矿流体的δ¹³C_CO2为-6.16‰～1.53‰和-2.39‰～6.43‰,δ¹⁸O_H2O分别为1.62‰～7.62‰和4.36‰～16.92‰,通过与岩浆CO₂(δ¹³C=-2‰～-8‰)和围岩灰岩(δ¹³C=-1.6‰～4.0‰)的δ¹³C值相比较,指示块状矿体成矿流体中的碳主要来自岩浆,网脉状矿体成矿流体中...