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安徽月山矿成矿流体中铜,金的迁移形式和沉淀的物理化学条件 总被引：4，自引：0，他引：4
文章基于矿床地质特征和地球化学热力学理论,计算和讨论了安微月山矽卡岩－热液型铜,金矿田成矿流体中成矿物质的迁移形式和沉淀的物理化学条件,两类矿床的主要成矿阶段,成矿流体中铜主要以氯络合物ＣｕＣｌ、ＣｕＣｌ２＾－、ＣｕＣｌ＾２－３,ＣｕＣｌＯＨ,金主要以硫的络合物Ａｕ２（ＨＳ）２Ｓ＾２－,Ａｕ（ＨＳ）２＾－,ＡｕＨＳ、ＡｕＨ３ＳｉＯ４等形式进行迁移,成矿流体中铜沉淀的主要物化条件是降温及氯离子浓度的 相似文献
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胶东台上金矿成矿机制模拟实验研究 总被引：2，自引：0，他引：2
模拟实验研究表明，台上金矿床的成矿机制为：胶东群地层重熔形成滦家河花岗岩岩浆时，初始浆为几乎均匀的熔体相；随着结晶成岩作用的进行，由于局部岩浆结晶分异作用，产生富Ｋ＾＋，Ｎａ＾２＾＋，Ｃａ＾２＾＋，Ｍｇ＾２＾＋，Ｆ＾－，Ｃｌ＾－，Ｓ＾２＾－，ＣＯ３＾２＾－及挥发份ＣＯ２，ＣＯ，Ｈ２Ｏ等的流体相，并不断从已结晶矿物及残熔体中，以［Ａｕ（ＨＳ）２］＾－，［Ａｕ（ＨＳ）Ｓ］＾２＾－，ＡｕＣｌ４］＾－等络 相似文献
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重铬酸钾法测定废水COD条件改进的研究 总被引：3，自引：0，他引：3
本提出用ＣｕＳＯ４作催化剂，在Ｈ２ＳＯ４－Ｈ２ＰＯ４溶液中，重铬酸钾回流测定废水ＣＯＤ的方法，实验表明，最佳测定条件为：ＣｕＳＯ４浓度为７×１０＾－２ｍｏｌ．Ｌ＾－１（混酸溶液）：Ｈ２ＳＯ４：Ｈ３ＰＯ４＝５：１（体积比）回流时间２ｈ，通过与标准方法对比，测定结果满意，本方法的优点是：不需用贵重金试剂Ａｇ２ＳＯ４，改用ＣｕＳＯ４作催化剂，精密度高，准确性好，具有一定的实用价值。 相似文献
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东坪金矿床的围岩蚀变和流体特征 总被引：1，自引：0，他引：1
东坪金矿床围岩蚀变特征、流体包裹体特征与氢氧同位素特征研究表明，成矿流体富集Ｋ＾＋，Ｎａ＾＋，Ａｕ＾＋，Ｃｌ＾－和ＣＯ２、Ｈ２Ｓ成矿溶液以岩浆热液为主，但有天水的混合。金在溶液中以Ａｕ（ＨＳ）＾－２和ＡｕＣｌ＾－２形式存在，构造活动引起的压力突变和流岩反应是引起金沉淀的主要因素。 相似文献
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硫脲浸取—光度法测定硫化矿中金 总被引：3，自引：0，他引：3
常温下在Ｈ２Ｃ２Ｏ４－Ｈ２ＳＯ４介绍中,用５０ｇ／Ｌ硫脲（Ｔｕ）溶液可完全浸提含金硫化矿中Ａｕ,对金的浸取率可达９９．８％,然后作用ＣＬ－Ｐ２０４萃淋树脂事集含金分解液中Ａｕ（Ｔｕ）２＾＋,结晶紫分光度法测定。方法用于硫化原生矿及含硫浮选精矿中Ａｕ的测定,所得结果与王水分解原子吸收法测定相符,其ＲＳＤ（ｎ＝５）〈３％。 相似文献
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邻羟基苯基重氮氨基偶氮苯与铜显色反应的研究及应用 总被引：1，自引：0，他引：1
研究了邻羟基苯基重氮氨基偶氮苯与Ｃｕ＾２＋的显色反应。在乳化剂ＯＰ存在下及ＰＨ１０．０－１２．０的Ｎａ２Ｂ４Ｏ７－ＮａＯＨ缓冲介质中，Ｃｕ＾２＋和ｏ－ＨＤＡＡ形成１“３的红色配合物，其最大吸收波长为５４６ｎｍ，表观摩尔吸光系数４．２０＊１０＾４Ｌ．ｍｏｌ＾－３．ｃｍ＾－１。 相似文献
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钒金试剂Ⅱ指示滴定法测定天然水和岩矿中痕量金 总被引：1，自引：0，他引：1
在硫磷混合酸和尿素存在下，用ＫＩ和ＳｎＣｌ２还原富集在泡塑上Ａｕ＾３＋呈Ａｕｌ而进入溶液，用ＮａＮＯ２氧化过量ＫＩ和ＳｎＣｌ２，ＡｕＩ中Ｉ＾－不被氧化。过量ＮａＮＯ２被尿素破坏后，以作者合成的钒金试剂Ⅱ为指示剂，偏钒酸铵标准液碇 ＡｕＩ中Ｉ＾－，至溶液出现紫红色为终点测定痕量Ａｕ，在５ｍｌ滴定液中可检出０．３ｐｇ Ａｕ．对０．０１ｍｇ Ａｕ，５次重复测定，其ＲＳＤ为７．４３％。 相似文献
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碳酸盐岩石中痕量金分析方法的研究 总被引：4，自引：0，他引：4
研究了碳酸盐岩石中痕量金的分析方法，提出以适量的ＨＣｌ处理样品，使绝大分碳酸盐岩石分解，然后加入少量活性炭低附可能转入溶液中的Ａｕ，过滤除去Ｃａ＾２＋、Ｍｇ＾２＋等。少量残渣活性炭经灼烧灰化后，用ＨＣｌ－ＮＯ３－ＨＦ－ＨＣｌＯ４溶解，在１ｍｏｌ／ＬＨＣｌ溶液中，用甲基异丁基酮萃取Ａｕ，在日立１８０－８０原子吸收光谱仪上，采用平台在石墨炉原子吸收法测定。方法检出限０．２ｎｇ／ｇＲＳＤ〈３３％。 相似文献
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湘西南金矿床成矿流体地球化学研究 总被引：10，自引：1，他引：9
流体包裹体地球化学和氢、氧同位素研究表明,湘西南金矿床的成矿流体显示出低温、低盐度、中等密度、低氧逸度、呈中性－弱碱性的特征,成矿流体中的金主要以Ａｕ（ＨＳ）２＾－、ＡｕＨ３ＳｉＯ４＾０等络合物形式迁移,金矿床形成于低温、低压环境条件下,成矿溶液主要来自大气降水。流体包裹体同位素测年与示踪研究表明,该区金矿床并非形成于传统认识中的武陵－雪峰期,而是加里东期成矿,金矿床的成矿物质主要来自赋矿地层而非 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