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《矿物岩石》2015,(4)
采用化学分析、X射线衍射分析、偏光显微镜下矿物组成分析和扫描电子显微镜对鲁中莱芜地区矽卡岩铁矿石的工艺矿物学性质进行研究,以期对选厂的生产工艺流程和选矿指标优化提供技术资料。研究发现,矿石中主要金属矿物为磁铁矿、黄铁矿、黄铜矿、辉铜矿,各金属矿物共生关系密切,磁铁矿含量为52%,矿石全铁品位为40.86%,其中磁性铁占有率为91.31%,磁铁矿嵌布粒度以中细粒为主,大多在0.1mm~0.01mm之间;铜矿物包括黄铜矿和辉铜矿以及少量孔雀石等氧化铜矿物,铜品位为0.131%,其中硫化铜占有率为65.65%,黄铜矿和辉铜矿均以微细粒嵌布为主,粒度主要在0.08 mm~0.01mm;矿石中钴品位为0.018%,其中硫化钴占有率为30.56%,大部分以氧化钴的形式存在于磁铁矿中。综合各金属矿物的工艺矿物学性质,该矿石中的铁矿物弱磁选铁理论回收率为91.31%,铜矿物浮选铜理论回收率为65.65%,而钴矿物浮选钴理论回收率为30.56%。 相似文献
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某热液沉积型铜铅锌多金属矿石伴生丰富的银。工艺矿物学研究表明,该矿石银的赋存状态有着其独特之处,银赋存与铜矿物密切相关,银主要以较罕见的硫铜银矿矿物形式产出,嵌布于斑铜矿微裂缝中。 相似文献
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着重研究梅县玉水铜多金属矿体中矿石的产出特征,黄铜矿、斑铜矿、辉铜矿、锌黔铜矿、锌砷黔铜矿、硫铜银矿、新发现的矿物硫铜铜矿等矿石矿物的矿物学特征和银的赋存状态。 相似文献
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秘鲁铜硫矿石的主要回收对象是铜和硫矿物,由于铜矿物嵌布复杂、粒度过细以及与各种脉石矿物或金属矿物交生关系紧密,利用传统工艺矿物学研究方法如化学分析、光学显微镜检测等较难准确定量其工艺矿物学参数。本文采用化学分析、X射线衍射、扫描电镜、偏光显微镜及矿物参数自动分析系统(MLA)等技术手段,研究秘鲁铜硫矿石的化学成分、矿物组成和主要矿物的嵌布特征、粒度分布及单体解离特性等,并对影响选矿指标的主要矿物学因素进行分析。结果表明:矿石中主要元素为Cu(0.65%)和S(9.53%)。矿石中黄铁矿(16.57%)含量较高,形态较为规则,与其他矿物之间的交生关系相对简单,粒度普遍偏粗,其中粒径大于0.30mm的黄铁矿占95.06%。铜矿物主要以不规则粒状、皮壳状、网脉状、纤维状、尘粒状、斑点状分布于脉石中或与黄铁矿、闪锌矿、磁铁矿等金属矿物交生紧密,粒度极不均匀,使得铜矿物解离难度加大,且矿石中云母(12.51%)、绿泥石(3.74%)、滑石(3.34%)、高岭石、蒙脱石(3.59%)等黏土质矿物含量较高,在磨矿过程中易发生泥化从而恶化分选环境。根据该类型矿石的工艺矿物学特性,本文建议采用"粗磨-部分优先浮铜-铜硫混浮-混合精矿再磨再选分离"的工艺流程,可得到质量高的铜、硫精矿。 相似文献
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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
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黔西北威宁地区香炉山铜矿床位于二叠系峨眉山玄武岩组第3段(P3β3)顶部与宣威组(P3x)底部之间,属于玄武岩型铜矿床。针对其含矿地层宏观地质特征与赋矿主岩矿物岩石学组构,本文以野外地质为基础,系统开展岩矿鉴定、扫描电镜与电子探针分析等研究,结果表明,本矿床赋矿主岩为岩屑粉砂岩的矿石矿物为辉铜矿、斑铜矿、黝铜矿和孔雀石,脉石矿物为长石、石英、绿泥石和碳质物等;赋矿主岩为火山角砾岩的矿石矿物为自然铜、斑铜矿、黄铜矿、辉铜矿、黝铜矿和孔雀石,其脉石矿物为石英、绿泥石、白云石和粘土矿物等,按其主要矿物含量,原生矿石可分为自然铜+辉铜矿+赤铁矿矿石、自然铜+黄铜矿+黝铜矿矿石、黄铜矿+斑铜矿+赤铁矿矿石3种自然类型。根据矿物共生组合与相互穿插关系,本矿床成矿作用可分为热液期和表生期,其中,热液期矿石矿物的形成顺序为斑铜矿→黄铜矿—黝铜矿—自然铜→辉铜矿,表生期形成孔雀石、赤铜矿、赤铁矿、钛铁矿、褐铁矿等矿物。 相似文献
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云南思茅地区铜锌硫化矿工艺矿物学分析 总被引:17,自引:2,他引:15
云南思茅地区有大量难选铜锌多金属硫化矿资源,由于其矿石结构、成分及构造复杂,采用传统的镜下鉴定工艺矿物学分析对铜、锌等有价金属的赋存状态等难以自动准确定量。本文采用化学分析、偏光显微分析及矿物解离度分析(MLA)等多种现代分析测试方法,研究该地区矿石的主要元素组成、矿物种类、嵌布和包裹特性等。分析表明,铜锌硫化矿的主要元素及含量为Cu 3.03%、Zn 3.90%、S 27.44%、Pb 0.13%。金属矿物主要是黄铁矿、黄铜矿和闪锌矿,含少量方铅矿;目的矿物黄铜矿、闪锌矿主要与黄铁矿连生和被其包裹;其次黄铜矿和闪锌矿相互连生和被其包裹,且96%以上的黄铜矿、闪锌矿和黄铁矿均分布在粒度大于9.6μm的易选粒级范围。方铅矿多呈细粒嵌布状,与铜、锌、硫矿物之间的磨矿解离有一定困难。根据工艺矿物学研究结果,本文提出,思茅地区的铜锌硫化矿矿石需磨至约31μm方能实现铜-锌-硫矿物的解离,需磨至约14μm方能实现铅与其他矿物的解离,同时预测了铜锌硫化矿中铜和锌的理论选矿回收率分别为91.22%和84.92%。本文研究成果对该地区难选多金属硫化矿的选矿技术制定和指标选择具有实际的指导意义。 相似文献
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Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
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The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引:4,自引:0,他引:4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 相似文献
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Emmanuel Skourtsos Daniel Vachard Alexandra Zambetakis-Lekkas Rossana Martini Louisette Zaninetti 《Comptes Rendus Geoscience》2002,334(12):925-931
Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931. 相似文献
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正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.) 相似文献
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正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.) 相似文献
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正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.) 相似文献
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正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus., 相似文献
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正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an 相似文献
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正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of 相似文献