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综合介绍了已用于生产的从阳极泥贵渣,锌沉积物,载金粉炭,载金钢棉及合质金等物料中提取高纯金的工艺流程。对流程中的若干问题进行了探讨。 相似文献
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地下工程复杂渗流场数值模拟研究与应用 总被引:3,自引:0,他引:3
结合地下工程复杂渗流场三维有限元分析的实际 ,用渗透张量模拟非均匀各向异性 ,用改进丢单元法迭代自由水面 ,用隐性的复合材料单元模拟断层 ,用隔水层模型模拟防渗帷幕 ,用以沟代井模拟排水井列。在此理论基础上编制了渗流分析的三维有限元计算程序。且用此程序成功求解了漫湾水电站二期工程地下厂房围岩的复杂渗流场 ,并在此基础上分析渗流场分布的主要影响因素的影响。结果验证了程序的合理性和实用性 相似文献
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我国重力固体潮实验研究进展 总被引:5,自引:2,他引:3
综述了我国重力固体潮研究领域的相关成果,包括积累大量观测数据,建立国际潮汐基准和独立的国际标定系统,利用小参数扰动法发展了地球潮汐理论模型,用计算机演绎法实施潮汐位展开,用残差信号对数据作预处理,用小波分析方法设计滤波器,用远近区结合法解算海潮负荷,用大气重力格林函数法解算气压对重力场观测的影响,测定了地球的近周日自由摆动参数,将固体潮汐研究成果应用于地震和重力测量,对重力仪进行静电反馈改造,精密测定了仪器相位滞后和对超导重力仪进行了标定等内容,讨论了今后研究展望。 相似文献
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简要介绍了用地质雷达检测公路基层脱空的基本原理、数据采集处理要点和资料解释思路.展示了用自行开发软件系统进行处理解释的实例成果,证明用地质雷达检测公路基层脱空是可行的. 相似文献
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EXCEL在化探样品分析质量监控图绘制中的应用研究 总被引:1,自引:0,他引:1
用计算机绘制化探样品分析质量监控图,革除了手工绘图弊端,大大提高工作效率,尤其是用普通打印机替代绘图仪,展示了其广阔的应用前景。 相似文献
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重力中区地形改正系统的研制 总被引:1,自引:1,他引:1
从传统的重力地形改正方法入手,用Delphi语言编制了Windows程序,使得多年来重力中区地形改正繁重的手工数图工作能够用计算机完成,且计算精度得到明显提高。最后用甘肃1:20万昌马幅的53个重力测点进行了试算。 相似文献
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文章根据我国地质勘查规范中有关饰面用灰岩工业指标与广西饰面用灰岩勘查与开发利用的不匹配案例,分析了广西饰面用灰岩勘查与开发利用的实际情况,认为有必要结合开发现状和市场需求,对饰面用灰岩矿产工业指标具体内容进行调整和灵活运用。 相似文献
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《Journal of South American Earth Sciences》2000,13(3):217-224
At São Bartolomeu, central Brazil, chemical weathering of auriferous sulphide-rich quartz veins has produced a gold-bearing gossan. In the gossan, gold is present both as a residual primary mineral and as a neoformed secondary mineral. Primary gold particles contain varying amounts of silver. They are always more or less weathered, presenting rough surfaces pitted by numerous micrometric cavities. Other dissolution features identified in primary particles are indented shapes and jagged rims. Secondary gold occurs as aggregates of minute pseudohexagonal particles strongly depleted in silver. The presence of sulphur-containing complexes formed during the oxidation of the sulphides appears adequate to explain both the dissolution features on primary gold particles and the formation of pure supergene gold. 相似文献
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提出了一种化探找金、银的新方法,该法采用一种混合浸取剂,以螯合吸附剂对采集到的化探次生晕样品进行偏提取.对偏提取的金、银含量,利用液珠萃取比色法进行金、银含量测定,从而达到化探直接找金、银的目的.该法克服了化探找金工作中的“粒金效应”.该设备简单、易操作. 相似文献
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长坑矿田金,银矿床地球化学特征及形成差异分析 总被引:10,自引:0,他引:10
长坑矿田金、银矿体主要产于下石炭统与上三叠统不整合面之下的硅质岩中,金、银矿体分离。金矿体主要为浸染状,富集As、Sb、Hg;银矿体主要为脉状,富集Cu、Pb、Zn。金矿体铅同位素组成与寒武纪—石炭纪地层及硅质岩的相同,银矿体铅同位素组成与金矿体的不同。金、银矿体的氢、氧、碳同位素组成也明显不同。银矿体Rb-Sr等时线年龄为70.4Ma。据上述特征,笔者认为长坑金、银矿床是不同成矿作用形成的,金矿主要是热水沉积形成,银矿主要是燕山期晚期改造形成。 相似文献
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S. Jaireth 《Australian Journal of Earth Sciences》2013,60(3):181-189
This paper presents the results of thermodynamic calculations on the solubility of gold and silver in low‐temperature, moderately saline, oxygen‐saturated fluids. Based on the solubilities of gold and silver it is argued that the quantity of gold transported by the fluids depends on the concentration of silver in the primary ores. In ores where the silver/gold ratio is high (1 to > 10), the fluids become saturated in silver and can not dissolve geologically significant concentrations of gold. In ores where the silver/gold ratio is low (< 1), the fluids remain undersaturated with respect to silver and are able to dissolve geologically realistic concentrations of gold and silver. The oxidized fluids start depositing gold and silver as they move downwards and are reduced by the Fe+2‐bearing minerals of the primary ores. The occurrence of gold in lateritic profiles can be explained by a prolonged process of interaction between the fluid and primary ores, during which gold and silver precipitate and redissolve selectively at the gradually advancing oxidation‐reduction interface. 相似文献
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Thermodynamic analysis of the stability conditions for gold-silver solid solutions reveals that the silver component is unstable with respect to chlorargyrite and silver sulfate in most weathering environments. As a consequence supergene (secondary) gold and gold found in modern river placers (detrital and authigenic) tends to be pure. Impure, detrital placer gold is subject to natural purification processes as evidenced by silver depleted, spongey grain margins. In contrast, under hydrothermal conditions the silver content of primary gold can be controlled by equilibrium reactions with argentite. 相似文献
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秦岭横亘中国大陆中部,东西绵延1300km,地跨豫、鄂、皖、陕、甘、青、川七省,面积约400000km2,它是我国著名的"中部多金属成矿带".金银矿产为重要的优势资源,矿床星罗棋布.迄今为止,已探明金矿床145处,其中砂金矿床44处,岩金矿床101处;银矿床24处.该区金、银矿床成矿类型繁多,具有得天独厚的聚矿条件,其中小秦岭享有"第二金库"的美称.遐迩闻名的"陕甘川金三角"地区的成矿受巨型帚状构造控制,可与全球诸多巨型-超巨型金矿之聚矿条件媲美.本区金、银矿产成矿规律明显,具有极其理想的成矿条件,是进一步查勘巨型-超巨型金矿的最佳地区 相似文献
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Ma Mintao Guan Guangyue Department of Chemistry Environment Engineering Beijing Polytechnic University Beijing Geological Department Northeast University of Technology Shenyang Liaoning Fei Zhenbi 《《地质学报》英文版》1997,71(1):58-68
The Sain Us gold deposit is a typical auriferous sulphide quartz vein deposit in the InnerMongolian arid steppe climatic region. The oxidation zone has been controlled by the arid cli-mate since the beginning of the Holocene. Gold supergene evolution is characterized by enlarge-ment of gold grains, complication of the gold form, raising of the gold grade and increase of thegold fineness; besides, gold and silver have two enrichment peaks at the same depth, which is insharp contrast to the unimodal enrichment of gold and silver and the occurrence of gold aboveand silver below in a humid climatic region. Sun pumping is the main cause for the bimodalenrichment of gold and silver. Illite 2 M_1 is one of the main causes for the upper enrichment peakof gold and silver. 相似文献
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The deposit under study is a hydrothermal filling-metasomatic vein type lead-zinc-silver deposit, in whichgold and silver can be recovered as by-products. These metals mainly occur as microgranular native gold,electrum, stephanite, acanthite, pyraragyrite, freibergite, and native silver. Gold minerals tend to be associatedwith galenobismutite, native bismuth and unnamed Bi_2Te. They are either enclosed in pyrite, marmatite,iron-bearing sphalerite and galens or fill the microfissures of these minerals. Silver minerals usually occur incleavages or fissures of galena, marmatite and pyrite, but are not associated with gold and bismuth minerals.Gold and silver mineralizations occurred later than lead and zinc, while the silver mineralization was precededby that of gold. 相似文献