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1.
矿床产于近地表处。矿石呈黑褐色,土状,主要由铁的氢氧化物、锰的氢氧化物、石英、粘土等矿物组成。矿石中含金、银、铜、铅、锌、镓、铟、锗、镉、碲等有用元素,其品位接近综合利用要求。它们的赋存状态如下: 金、银的赋存状态:除可见少量独立矿物外,金主要呈吸附状态,次为机械杂质(显微粒)包裹状态。银主要呈显微机械杂质包裹状态,次为吸附状态。金的主载体是铁的氢氧化物,银的主载体是锰的氢氧化物。铜、铅、锌的赋存状态:除可见独立矿物外,绝大多数的铅锌呈类质同象置换的方式存于铁、锰的氢氧化物中。绝大多数的铜呈吸附方式存于铁、锰氢氧化物中。镓、铟、锗、镉、碲的赋存状态:未见独立矿物,它们呈细分散状态,以吸附方式赋存于载体矿物中。镓的主要载体是粘土和铁的氢氧化物,铟、锗、碲的主要载体是铁的氢氧化物,镉的主要载体是锰的氢氧化物。综上所述,有用元素(除镓外),主要呈细分散状态载负于铁、锰的氢氧化物中,在选矿流程中上述伴生元素将随铁、锰矿物的富集而相对富集,但若从铁、锰矿物中分离出上述元素,则须采用化选或冶炼方法甚至更为复杂的方法,才能分别回收。 相似文献
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香格里拉铜钼多金属矿石中主要的可利用成分为钼、铜,伴生有钨等成分。为在选冶利用中选择合理高效的可利用方法,工艺矿物学研究主要针对矿石中可利用成分和相关伴生成分开展了赋存状态研究,特别是钼、铜金属矿物存在形式及其对选矿利用的影响进行了分析,为最终实现该类型矿石的高效合理利用提供基础依据。选矿实验采用"浮选-磁选-重选"联合工艺流程,获得钼精矿品位52.34%,钼回收率71.32%;铜精矿品位22.68%,铜回收率71.91%;钨精矿品位36.13%,钨回收率57.27%,从而实现了该矿中钼、铜、钨等有用元素的综合回收,验证了工艺矿物学研究结果的正确性。 相似文献
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中国云南省有大量的铜铅锌多金属硫化矿资源,该类矿产资源的高效选矿分离是影响企业经济效益的主要问题之一。针对云南迪庆地区的硫化混合精矿,该混合精矿铜、铅、锌三种有价金属共存,分离难度较大,导致其产品难以销售或冶炼。本文采用化学分析、X射线衍射法和矿物解离度分析(MLA)等多种检测方法,对该混合精矿的主要元素含量、矿物组成、物相组成、主要目的矿物的嵌布特性和单体解离度等进行分析研究。研究结果表明,该混合精矿的粒度较细,各矿物之间存在一定的相互连生或包裹现象,目的矿物黄铜矿、方铅矿和闪锌矿的单体解离度中等偏低,为69.28%～70.56%。初步预测该混合精矿中铜、铅和锌的理论选矿分离效率依次为71.63%、62.97%和72.72%。根据实验分析结果,本文提出进一步提高该混合精矿的磨矿细度促使金属矿物充分解离,是提升铜、铅、锌各矿物选矿分离效率的关键途径。 相似文献
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甘肃小柳沟钨矿床矿石特征 总被引：3，自引：3，他引：3
文章对甘肃小柳沟钨矿床矿石类型、矿石结构构造、矿石矿物化学成分、主要有用组分赋存状态及其镶嵌关系、矿石比重特征进行了详细论述,指出(1)小柳沟钨矿床矿石类型简单;(2)矿石结构构造较为复杂;(3)矿石中矿物组成较复杂,种类多;矿石中有用元素主要有钨,此外含硫、铜、铋、钼、锌、锡等,钨是矿石中主要回收对象,而硫、铜、铋等具有一定的综合利用价值,可以考虑综合回收;(4)矿石中钨主要呈白钨矿存在,有少量钨华及黑钨矿;矿石中铜主要呈黄铜矿存在,有少量斑铜矿或辉铜矿;矿石中铋主要呈辉铋矿存在;矿石中钼主要呈辉钼矿存在,部分呈类质同象分布于白钨矿中,这部分钼难以用选矿方法分离;矿石中含硫矿物主要为黄铁矿,次为磁黄铁矿,其他含硫的矿物有黄铜矿、辉铋矿、辉钼矿,但是量都很少;(5)1号矿体及4号矿体所处矿化带中矿体的比重值不尽相同,进行资源/储量估算时应区别对待. 相似文献
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通过分析研究,基本查明了江西仙山岗银金矿床矿石性质、物质组分及金银赋存状态特征如下:矿石中有工业价值的元素为Au和Ag;矿石矿物以褐铁矿为主,脉石矿物以石英为主;矿石的结构构造有利于各矿物的单体解离;金银矿物以独立矿物存在,且主要赋存于矿物粒间;为选矿试验提供必要参数,并为矿床进一步开发提供了可靠依据. 相似文献
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老挝班康姆某矿床位于老挝沙耶武里省巴莱县西南部,属于琅勃拉邦—黎府成矿带。前人已完成矿床铜、金资源量的预测,尚未对矿石工艺特性进行研究。本文利用化学分析、光学显微鉴定、X射线扫面电镜能谱分析、物相分析等方法,对该矿床铜金矿石的工艺特性进行了系统研究。研究确定矿石属原生硫化物型铜(伴生金)矿石,可选性好。选矿回收的目标元素为Cu、Au,品位分别为0.74%、0.94g/t。Cu主要以黄铜矿形式存在;Au主要以银金矿形式存在,以包裹金为主。黄铜矿为回收Cu、Au的目标矿物。当磨矿细度为-0.074mm占70%±之时,选矿试验得到Cu回收率90.8%、Au回收率63.5%,铜精矿产品达到国家二级标准。以上结果表明,矿石工艺矿物学研究对选矿试验具有良好的指导作用。 相似文献
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金赋存状态的研究,不仅可为金矿选冶提供技术参数,还有成因和化探等方面的意义。通过玲珑金矿大开头矿区金及主要矿石矿物的电子探针分析,显示出金只以独立金矿物相形式;金矿物主要为银金矿和含银自然金;金矿物以裂隙金、粒问金和包体金存在于黄铁矿或石英等颗粒中,但主要是存在于黄铁矿的裂隙中和硫化物与石英之间的晶体间隙中。金矿形态有极细的脉状、角砾状、麦粒状、浑圆粒状和不规则粒状等;粒状金矿物粒度细小、多在10μm左右;细脉状金的脉宽多在1-5μm之间。以黄铁矿为主的硫化物化学成分中几乎不舍金,金仅呈独立金矿物相。根据金与硫化物和石英的相嵌关系,探讨了本区金成矿作用过程。 相似文献
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冯家场金矿床位于祁连—秦岭造山带接合部位,矿体赋存于震旦—奥陶系李子园群木其滩组第二岩性段的变质岩系中。关子镇—元家坪区域韧性剪切带是主要导矿、控矿构造。文章对矿床矿石类型、矿石结构构造、矿石矿物化学成分、主要有用组分赋存状态及其镶嵌关系特征进行了详细论述,指出:(1)矿床矿石类型、结构构造较简单;(2)矿石中有用元素主要有金、银、铜、铅、锌等;(3)矿石中含硫矿物主要为黄铁矿、黄铜矿、方铅矿、闪锌矿等,贵金属矿物为自然金、自然银、银金矿、金银矿等。通过对矿床中金的赋存状态、围岩蚀变等特征分析、研究,指出了该矿床找矿标志。 相似文献
11.
文章对卡拉玛铜矿床中伴生金的工艺矿物学特征进行了研究.结果显示,矿石主要由黄铜矿、黄铁矿、菱铁矿和少量辉铜矿组成,伴生金主要呈独立矿物自然金产出,多数金矿物以脉型和裂隙型嵌布于矿石中,金矿物的粒度多分布在0.10～0.05mm,矿石中金的理想回收率为86.78%. 相似文献
12.
Gold paragenesis and chemistry at Batu Hijau, Indoneisa: implications for gold-rich porphyry copper deposits 总被引：3，自引：0，他引：3
Gold is an important by-product in many porphyry-type deposits but the distribution and chemistry of gold in such systems remains poorly understood. Here we report the results of petrographic, electron microprobe, laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), and flotation test studies of gold and associated copper sulfides within a paragenetic framework from the world-class Batu Hijau (914 mt @ 0.53% Cu, 0.40 g/t Au) porphyry copper–gold deposit, Indonesia. Unlike many other porphyry copper–gold deposits, early copper minerals (bornite–digenite–chalcocite) are well preserved at Batu Hijau and the chalcopyrite–pyrite overprint is less developed. Hence, it provides an excellent opportunity to study the entire gold paragenesis of the porphyry system. In 105 polished thin sections, 699 native gold grains were identified. Almost all of the native gold grains occurred either within quartz veins, attached to sulfide, or as free gold along quartz or silicate grain boundaries. The native gold grains are dominantly round in shape and mostly 1–12 m in size. The majority of gold was deposited during the formation of early A veins and is dominantly associated with bornite rather than chalcopyrite. The petrographic and LA-ICP-MS study results indicate that in bornite-rich ores gold mostly occurs within copper sulfide grains as invisible gold (i.e., within the sulfide structure) or as native gold grains. In chalcopyrite-rich ores gold mostly occurs as native gold grains with lesser invisible gold. Petrographic observations also indicate a higher proportion of free gold (native gold not attached to any sulfide) in chalcopyrite-rich ores compared to bornite rich ores. The pattern of free gold distribution appears to correlate with the flotation test data, where the average gold recovery value from chalcopyrite-rich ores is consistently lower than bornite-rich ores. Our data suggest that porphyry copper-gold deposits with chalcopyrite-rich ores are more likely to have a higher proportion of free gold and may require different ore processing strategies.Editorial handling: R. P. Richards 相似文献
13.
国内外“人工矿床”研究现状与前景 总被引：3，自引：0，他引：3
“人工矿床”主要是指废石及尾矿等能被重新利用的资源，在富矿资源日益减少的今天，贫矿资源，废石及尾矿等非传统资源的开发利用越来越受到重视，目前，国内外主要从物质再回收和物质转移两个方面对废石和尾矿的综合利用进行研究。国外已利用细菌浸出等先进的矿物加工工艺从低品位的含铜和含金的废石和尾矿中回民铜和金，利用已无回收价值的尾矿加工制造水泥，陶瓷，玻璃等新型材料，国内主要利用重选，磁选，浮选，化学选矿联合工艺流程回民铁，铜，金等尾矿中的有用元素,利用废石，尾矿作建筑石料或加工制造砖，混凝土，陶瓷等建筑材料。 相似文献
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Selenium Enrichment in Cambrian Stratabound Gold Deposits in the Western Qinling Mountains 总被引：1，自引：0，他引：1
Liu Jiajun Open Laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang Guizhou Zheng Minghu Chengdu Institute of Technology Chengdu Sichuan Liu Jianming Research Centre of Mineral Resources Exploration Chinese Academy of Sciences Beijing Zhou Yufeng Gu Xuexiang Zhang Bin Lin Li Chengdu Institute of Technology Chengdu Sichuan Lu Wenquan Institute of Comprehensive Utilization of Mineral Resources Chengdu Sichuan 《《地质学报》英文版》1997,71(4):423-432
Stratabound gold deposits in the western Qinling Mountains occur in Cambrian chert formation composed of carbonaceous chert and carbonaceous slate. The distinctive chert formation provides important grounds for the mineralization and controls on the formation of gold deposits. Study shows that Se is exceptionally higher in both host rocks and gold orebodies. It may be recovered as a valuable component in ores for total utilization, and in some localities even independent Se orebodies (which are mined exclusively for Se) may be delineated. In gold ore Se mainly occurs as independent minerals or in the isomorphous form in sulphides and there is a positive correlation between Se and Au. 相似文献
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《International Geology Review》2012,54(11):1037-1045
Cambrian stratabound gold deposits in the western Qinling Mountains are hosted in a siliceous formation composed of black chert and carbonaceous slate. Studies have shown that Se is sufficiently high in abundance either in wall rocks or in gold ores as to reach economic grade. Locally, some independent Se ore bodies (Se >500 ppm) can be delineated. In gold ores, Se is present mainly as separate minerals, or as isomorphous solutions in sulfides. In addition, Se is positively correlated with Au. What is more important is that in the gold ores, native gold is commonly intimately inter-grown with selenium minerals. On the basis of this unique phenomenon, the authors hypothesize that gold and selenium may be transported by Au-S-Se or Au-Se complexes. The co-enrichment of Au and Se is attributed mainly to the boiling of ore fluids and their mixing with shallow-seated oxygen-bearing water. 相似文献
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萨热阔布金矿是阿尔泰山南缘金一多金属矿带中与断裂变质作用有关的石英脉一蚀变岩型金矿床。本文通过电子探针的研究,在该矿区发现较多的自然铋矿物,它与金矿化关系非常密切,产出于多金属硫化物阶段,与方铅矿、黄铜矿等共生。矿区蚀变岩和矿石的微量元素R型聚类分析表明,Bi与Au相关最密切,Au、Cu、Ag、Bi是主要的成矿元素组合。Bi异常可以作为金矿化的重要指示,自然铋矿物的出现可以作为含金石英脉富矿地段的重要标志。 相似文献
17.
西秦岭降扎地区寒武系层控金矿床中 Au-Se共同富集成矿机制 总被引：2，自引：0，他引：2
西秦岭降扎地区寒武系中的层控金矿床,产于由碳质硅岩和碳质板岩组成的硅岩建造中,研究表明,无论是围岩还是金矿,匀普遍含有国高的硒,达到工业综合利用的要求,在局部地段甚至可以圈出独立的硒矿体,在金矿石中,矿主要呈独立矿物和以类质同象形式存在于硫化物中,且硒与金呈密切的正相关关系,尤为重要的是,在金矿石中常常见到自然金与一些硒矿物紧密共生,说明Au,Se可能以Au-S-Se或Au-Se络合物形式进行迁移,由于沸腾的成矿流体与下渗的富氧冷水混合而发生氧化还原作用,导致了Au和Se的共同富集成矿。 相似文献
18.
A new type of gold mineralisation containing minor amounts of platinum and palladium has been found proximal to the secondary redox interface located below the Cu-Ag Kupferschiefer orebody of the Polkowice-Sieroszowice mine in the south-western part of the Lubin-Sieroszowice district, Poland. This deposit can be classified as redbed-type gold. Our study shows that gold, platinum and palladium occur in secondary red-coloured sections of the basal Zechstein sedimentary rocks and in the uppermost Weissliegendes sandstone. Noble metal mineralisation occurs within an average interval of 0.22 m, which lies directly below the copper ores. The average grade of the horizon is 2.25 ppm Au, 0.138 ppm Pt and 0.082 ppm Pd with a metal content of several tens of tonnes of gold. A transition zone has been recognised between the gold-bearing horizon and the copper deposit. This transition zone is characterised by the presence of low grades of copper (<0.2 wt%) and elevated gold contents (>0.5 ppm). Native gold accompanied by electrum, mercury-bearing gold, haematite, covellite, chalcocite, bornite and chalcopyrite has been identified in the gold-bearing horizon. In some sections, Pd-arsenides, tetra-auricupride, Co-arsenides, clausthalite, tennantite, digenite, yarrowite, spionkopite and galena have also been noted. 相似文献
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新疆哈密卡拉塔格块状硫化物矿床金银赋存状态研究 总被引：3，自引：0，他引：3
新疆哈密红海黄土坡VMS矿床位于东天山卡拉塔格隆起带,是卡拉塔格矿集区内新发现的块状硫化物矿床。矿体产于卡拉塔格隆起带核部火山沉积岩建造中,具有典型的VMS型矿床“上层下脉”二元结构特征。该矿床中含金硫化物矿石主要有块状黄铁矿黄铜矿、块状黄铁矿黄铜矿闪锌矿、块状黄铁矿闪锌矿黄铜矿和块状闪锌矿。文中在对各类含金硫化物矿石进行详细的矿相学研究基础上,结合扫描电子显微镜与能谱仪联用技术(SEM/EDS),对硫化物样品中金、银的赋存状态进行研究。结果表明,4种块状硫化物中的主要矿物形成于多个期次,主要包括VMS成矿期(黄铁矿阶段、闪锌矿黄铜矿黝铜矿方铅矿阶段、石英重晶石阶段)、热液叠加期(石英黄铁矿黄铜矿闪锌矿方铅矿阶段)和表生期(铜蓝纤铁矿阶段)。矿区首次发现4颗金银金属互化物(银金矿、碲银矿),其较大的化学成分差异指示了热液环境由中酸性中性转变为更有利于Au、Ag迁移沉淀的偏碱性。后期的偏碱性热液对VMS成矿期形成矿物产生了交代作用,使得Au、Ag活化再富集。由于后期热液叠加改造,红海VMS型矿床中Au、Ag不仅赋存于VMS成矿期后期中低温闪锌矿黄铜矿阶段,也赋存于VMS成矿期早期中高温黄铁矿阶段,并贯穿整个热液叠加期。各含金矿物组合中除4颗金银金属互化物外Au多呈显微不可见状态,推测Au、Ag主要以原子或离子形式赋存于矿物晶格中或矿物空位处。 相似文献
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《Journal of Geochemical Exploration》2004,84(1):3-20
The Chinkuashih is a group of dacite-related hydrothermal enargite-gold deposits of the Quaternary age, which produced 94 tons of gold and 119,101 tons of copper from 1895 to 1987. It has remaining reserves of 656 tons of gold with an average grade range of 1.5–3.5 g/ton of Au for all orebodies discovered.Mercury content in different media such as stream sediments, heavy minerals in stream sediments, soils, rocks/ores, and pyrite samples was analyzed by a gold–film mercury detector to evaluate whether mercury is a good pathfinder for these types of deposits at Chinkuashih. The gold film technique is more rapid and cheaper than the traditional fire assay or fire assay/ICP-MS gold and trace element analyses.Mercury in stream sediments and soils indicated the border zone of gold mineralization 12 km away from the center of mineralization at Chinkuashih. Mercury in heavy minerals of the stream sediments distinguished the intermediate zone with gold veins and gold/gold–copper breccia pipes from the core or inner zone with the gold–copper zone. It has been found that contours of 1000 or 500 ppb Hg of soil samples can delineate the outcropping gold orebodies. The gold ores generally contain 1000 ppb or more Hg. 相似文献