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1.
对猫岭－王家葳子金矿区矿石中伴生的微量元素研究表明，猫岭金矿的As,Cd,B,Be,Sn,Bi,Pb,Sb明显偏高，其中As,Cd,B高度富集，Bi,Sb,Sn,Be,Pb中度富集；王家崴子金矿Pb,Cr,Cd,Zn,Be,Sn,As明显偏高，其中Cd,Bi,As,Pb,Sn高度富集，Cu为中度富集。矿石中As,Bi,B含量较高与赋矿围岩中该元素高的原始富集有关。岩矿显微鉴定和多种数理统计分析综合研究表明，Pb,Zn,Cu主要以方铅矿、闪锌矿、黄铜矿和黝铜矿等独立矿物形式存在，部分呈类质同像形式分布于黄铁矿、毒砂等硫化物中。As以毒砂形式存在，部分以类质同像形式存在于黄铁矿、雌黄铁矿、白铁矿和黝铜矿中：Sb,Bi以固溶体混入物形式分布于黄铁矿、毒砂和黝铜矿中；Sn,B以独立矿物形式赋存于黄铁矿、方铅矿和黝铜矿中；Cd与方铅矿和闪锌矿、黝铜矿有关；部分Cr,Be,B与云母和粘土矿物有关。 相似文献
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四川拉拉铁氧化物铜金矿床（IOCG）形成的矿相学证据 总被引：6，自引：0，他引：6
四川拉拉铜矿是我国西南重要的大型铜矿,并且共（伴）生丰富的金—钼—钴—稀土—铁可供综合利用。系统的矿相学研究表明,矿石矿物主要为热液磁铁矿、黄铜矿、黄铁矿、白铁矿和辉钼矿;矿床围岩蚀变种类较多,主要有黑云母化、硅化、碳酸盐化、钠长石化、钾长石化、磷灰石化、阳起石化、萤石化等;矿石结构包括自形- 半自形- 它形晶粒结构、交代残余结构、包含结构和枝状结构,矿石构造包括浸染状构造、条带状构造、脉状- 网脉状构造和角砾状构造;载铜矿物主要为黄铜矿,钴主要赋存于黄铁矿和白铁矿中,钼赋存于辉钼矿中,金主要以自然金或含银自然金形式赋存于黄铜矿、黄铁矿和叶碲铋矿中;磁铁矿中钛含量低,矿石中硫含量低,罕见铅锌硫化物矿物。因此,拉拉铜矿应属于典型的铁氧化物铜金矿床。 相似文献
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四川丹巴杨柳坪矿床是峨眉大火成岩省典型铜镍硫化物矿床,此类矿床中蕴藏了丰富的铂族资源。岩矿石光片的扫描电镜与电子探针分析表明,四川丹巴杨柳坪铜镍硫化物矿床中Pt、Pd以独立矿物为主,少量铱族矿物具有成因指示意义,极少量Pt、Pd元素呈类质同象形式赋存于磁黄铁矿、黄铜矿中。Pt主要以独立矿物砷铂矿的形式存在,矿物粒径1～60μm,呈半自形-自形,主要被磁黄铁矿包裹,部分穿切磁黄铁矿、黄铜矿,少量被橄榄石与菱镁矿包裹。Pd以碲锑钯矿的形式存在,矿物自形程度较差,大量赋存于黄铜矿、磁黄铁矿等金属硫化物的裂隙,部分被黄铜矿包裹,少量形成于热液阶段的碲锑钯矿与辉砷钴矿紧密共生充填于裂隙中。铱族矿物呈半自形-自形与高温热液矿物辉砷钴矿紧密共生。 相似文献
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金家山金矿位于江南隆起带北缘,赋存于新元古代浅变质浊积岩基底岩层中,其成矿结构面为张性或扭张性断层,成矿地质体为角砾岩。矿石工业类型为角砾岩型金矿,矿石矿物主要为毒砂、黄铁矿,少量黄铜矿、闪锌矿、方铅矿、褐铁矿、自然金,矿石结构主要为半自形晶粒状结构、他形粒状结构,矿石构造以浸染状构造为主。通过地球化学工作有效圈出矿致异常,研究区Au元素属显著富集、强烈变异、极强叠加型元素,说明该区地质体遭受的后期各种构造作用叠加对金矿成矿有利,初步认为地球化学配合地质测量和探矿工程可快速找金。 相似文献
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甘肃阳山金矿是迄今为止中国发现的最大金矿。已发现的6个矿段均赋存于泥盆系中,矿石中金属矿物主要为黄铁矿和毒砂。黄铁矿有3种类型:微细粒浸染状、半自形颗粒集合体、自形单晶大颗粒;主要分布在千枚岩、花岗闪长岩、石英脉里,具有多期次多类型的特点。根据黄铁矿的特征,金矿化与石英脉体中细粒浸染状的一期黄铁矿有关。黄铁矿为重要的载金矿物之一,自然金(Au)主要以微细粒的形式赋存于黄铁矿晶体的裂隙内以及晶体与晶体的空隙间。黄铁矿赋存状态和分布特征的研究,对矿区进一步找矿具有指导意义。 相似文献
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【研究目的】为确定硫化物中金的赋存状态及元素含量特征。【研究方法】本文选取西天山萨瓦亚尔顿造山型金矿床（探明金储量127 t,远景资源量350 t）,针对矿石矿物黄铁矿、毒砂开展系统显微岩/矿相学观测、电子探针、LAICP-MS和扫描电镜分析。【研究结果】结果表明萨瓦亚尔顿矿石中除可见金外,还有“不可见金”主要以固溶体（Au+）形式赋存于黄铁矿、毒砂中。矿石中载金黄铁矿发育3期：球丛状黄铁矿（Py0）呈浸染状分布于围岩中,局部富含金,同时富集Ag、As、Bi、Ni、Cu、Pb、Sb等微量元素;他形黄铁矿（Py1）,分布于硅化围岩及强烈变形石英脉中,与他形毒砂（Apy1）伴生,电子探针得到的平均金含量为0.050%,富集Co、Mn、Zn等微量元素;自形—半自形黄铁矿（Py2）,在矿体中分布最为广泛,与未变形石英脉密切共生,伴生自形毒砂（Apy2）,电子探针分析得到的平均金含量为0.052%,微量元素相对Py1、Py2较为亏损。【结论】推测Py0形成于沉积成岩期;Py1形成于同碰撞期,与塔里木板块与中天山地块在晚石炭世碰撞事件有关;Py2形成于晚/后碰撞阶段。赋矿地层可能是金的初始矿源层,... 相似文献
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云南金厂箐金矿金的赋存状态及工艺特性研究 总被引：1，自引：0，他引：1
应用矿相显微镜、电子探针、Ｘ射线衍射仪和化学物相分析等测试手段，研究了金厂箐金矿中金及有害元素砷的赋存状态。金主要为次显微粒和显微粒自然金，多以包裹体形式散布于毒砂和黄铁矿为主的载金矿物中，毒砂和黄铁矿主要以自形、半自形晶状态产出，少部份呈极细粒状（＜１０μｍ）包裹于脉石矿物中；矿石中有害元素砷主要以毒砂和含砷黄铁矿的矿物形式存在。本文还对矿石工艺特性进行了研究，为选冶试验及其生产工艺提供了必要依据。 相似文献
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为给砂宝斯金矿床的勘探和利用提供依据,本文总结了多年的野外观察资料,并通过镜下鉴定、人工重砂、电子探针等方法对该矿床的矿石矿物、金矿物特征进行了系统研究。结果表明,该矿床的矿石类型为贫硫化物微细粒浸染型金矿石,矿石矿物主要为黄铁矿,次为毒砂,含有较多的微量元素;脉石矿物主要为石英。矿石结构主要为半自形-自形、他形、交代、固溶体分离结构,浸染状或细脉浸染状构造。金矿物主要为自然金,其赋存状态以硫化物中包裹金和脉石粒间金为主,主要为微粒金及次显微金,呈微细分散状态。除Au元素外,矿床中其他元素均不具有综合利用价值,有害元素含量低。 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