Li_2O-(Mg、Zn、Ni)O-V_2O_5三元体系的相平衡     

王辅亚 《矿物学报》1989,(3)

对Li_2O-(Mg、Zn、Ni)O-V_2O_5三元体系在500—800℃相图的研究表明,在每个系统内部都出现了一个依端员组分摩尔比为1:2:1的化合物。即橄榄石型的LiMgVO_4,硅铍石型的LiZnVO_4和尖晶石型的LiNiVO_4。不同的是,Li_2O-MgO-V_2O_5中发现了第二个三元相和一个固溶体。LiO_2-NiO-V_2O_6中得出一个固溶体,而LiZnNO_4中未得固溶体。  相似文献   

小体积萃取-石墨炉原子吸收法测定高纯硝酸钡中纳克级重金属元素     

董高翔  熊采华  汪康康  陈超英 《岩矿测试》1991,(4):287-290

本文研究了石墨炉原子吸收光谱法测定高纯硝酸钡中超痕量重金属元素的分析技术。提出在大量钡基体存在时,采用小体积萃取体系APDC-MIBK同时萃取纳克级的Fe、Cu、Co和Ni。该法具有灵敏度高、无干扰、操作方便和减少沾污等特点。方法检出限为:Fe 7.2ng/g、Cu 12.8ng/g、Co 4.4ng/g和Ni 6.7ng/g。应用于红外光纤原料硝酸钡、硝酸铝中痕量重金属的测定,效果良好。  相似文献   

A Screening Procedure for Heavy Metals in Soil Extracts by Alcohol Dehydrogenase and Urease Inhibition Eine Screening-Methode für Schwermetalle in Extrakten aus Bodenproben,basierend auf der Inhibierung der Enzyme Alkoholdehydrogenase und Urease     

A. Prell-Swaid  G. Schwedt 《洁净——土壤、空气、水》1994,22(2):70-75

A screening method for heavy metals in aqueous extracts of soil is presented which is based on inhibition of the enzymes urease and alcohol dehydrogenase. The method is suitable to detect cupric and mercury ions in concentrations below 0.01 mg/L and several other heavy metal ions in 1000 fold higher concentration. It is shown that the test may be used for screening of mercury ion concentrations exceeding 0.03 mg/L in aqueous solution when copper chelators are added to the test system. The usefulness of the presented tests to detect heavy metals eluted from soil was verified with samples from ore mining waste. The concentration of copper, lead, and zinc eluted from these samples to different amount was determined by atomic absorption spectrometry and was in good agreement with the enzyme inhibition data obtained with these samples.  相似文献   

水口山Pb－Zn－Au矿田含矿流体的性质、来源及其环流历程   总被引：6，自引：0，他引：6  

刘伟 《大地构造与成矿学》1994,18(3):209-209

在矿床地质研究的基础上，从矿物包裹体的显微岩相学、均一化温度、成分、含盐度和Ｈ、０、Ｃ稳定同位素组成方面，探讨了水口山Ｐｂ─Ｚｎ─Ａｕ矿田含矿流体的性质、来源及其环流历程。含矿流体系由岩浆期后热液和地下水混合而成。对于水口山矿区而言，岩浆热液起着主导作用；对于康家湾矿区而言，岩浆期后热液和地下水热液均起着重要作用。热液成矿期从早到晚，随着温度和含盐度的逐渐降低，地下水中雨水／地层卤水的比值逐渐增大。含矿流体的环流历程经历了５个阶段。  相似文献   

云南岔河铜矿成矿时代与成因   总被引：2，自引：0，他引：2  

张玉学  邵树勋 《地球化学》1995,24(2):180-187

早元古界岔河变质岩中铜矿石黄铜矿的Ｐｂ－Ｐｂ等时线年龄为９５１±３６Ｍａ，属于晋宁运动早期的成矿作用。矿石稀土分配模式与围岩相似，二者均以富轻稀土为特征，Ｅｕ轻微亏损，矿床成因与含铜变质岩系有关。黄铜矿的δ３４Ｓ值分布范围为－１２．４７‰－－５．３２‰，平均值为－８．９３‰。含矿岩系形成于近海开放体系中。微量元素研究表明，区域地层Ｃｕ、Ｍｏ、Ｓ的丰度较高，比泰勒的地壳丰度值高３－１０倍。Ｃｕ在矿化过程中，变质作用和构造控制有重要意义，地层中的成矿元素在有利的构造部位沉淀，形成浸染状矿化和石英硫化物脉。该矿床属于火山－沉积变质矿床。  相似文献   

关于成矿系列的结构   总被引：6，自引：1，他引：6  

翟裕生  熊永良 《地球科学》1987,(4)

成矿系列是一个自然系统,它由若干矿床成因类型组成。各矿床类型间的时空结构关系表现为各类型间的“共生性”、“过渡性”和“重叠性”;其物质结构关系表现为“互补性”.本文按系统论观点,分析了上述结构,提出长江中下游铁铜成矿系列的新模式,并指出研究成矿系列的结构对预测矿产的重要意义.  相似文献   

Influence of Temporal Variations in River Discharge, pH, Alkalinity and Ca on the Speciation and Concentration of Heavy Metals in Some Mining Polluted Rivers     

Pål Gundersen  Eiliv Steinnes 《Aquatic Geochemistry》2001,7(3):173-193

Dissolved (dialysis in situ) and total concentrations ofCu, Zn, Cd and Al in eight mining polluted rivers in the Røros area, central Norway, were determinedby atomic absorption spectrometry (flame and graphite furnace) and compared to pH, Caconcentration and alkalinity through seasonal variations in river discharge. Totalconcentrations of the metals were highest during early spring flood and during summer andautumn rain episodes. Dissolved concentrations also increased as the spring floodproceeded, but small discharge peaks within this 2 month period as well as a considerableautumn flood episode appeared to lower rather than to raise the dissolved metal concentrations.Consequently the dissolved fractions of Zn, Cd and Al showed a significant negative correlationwith river discharge, and were low at the discharge peaks. Possibly high sediment concentrationsoccurring at high flood conditions more than counteracted desorption induced by pHdecrease, and led to decreased dissolved fractions through adsorption. Cu speciationon the other hand seemed to be more closely linked to pH. Alkalinity and Ca concentration,both assumed to protect aquatic life from metal pollution, were significantly lowerduring episodes with high Cu and Al total concentrations.  相似文献   

广东省藤铁铁矿成矿地质特征     

武金阳 《地质找矿论丛》2005,20(Z1):131-133

藤铁铁矿位于鱼鹿岩枝东接触带中段,该矿体为铁、铜、锡共(伴)生矿床.受断裂带、岩体侵入接触带、夕卡岩带和鱼鹿岩枝控制.据此总结出该区"三带一体"的成矿特征.  相似文献   

宾川幔坳区斑岩铜矿综合信息三维找矿模型   总被引：2，自引：2，他引：2  

曹显光 《云南地质》2002,21(4):353-364

云南宾川幔坳区位于青藏高原横断山脉东缘，金沙江有色贵金属矿带南段，是云南仅次于东川-昭通，个旧-丘北的第三大幔坳区，本文首次概括综合信息三维找矿模型显示，该区可能赋存一个超大型斑岩系列铜矿床，区内纳米碳，铜，金相互作用是其主要成矿作用之一。  相似文献   

电气石对含Cu^2＋废水的净化原理探讨   总被引：30，自引：2，他引：30  

汤云晖  吴瑞华  章西焕 《岩石矿物学杂志》2002,21(2):192-196

研究了电气石的粒度、用量及环境条件（pH值、温度、搅动情况）对水中Cu^2 吸附的影响，分析了电气石对含Cu^2 废水的净化原理。电气石本身的静电场对Cu^2 的吸附作用使Cu^2 与表面羟基的离解产物OH^-在电气石表面上发生反应，形成沉淀，从而达到净化目的。  相似文献