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吉林省中、新生代黑色页岩（油页岩）中Ａｇ、Ｕ、Ｃｏ、Ｎｉ等元素含量偏高；黑色页岩（油页岩）中古生物组合丰富，有机碳含量很高（＞２％）．研究了吉林省中、新生代黑色页岩（油页岩）中稀、贵金属元素富集特征，初步探讨了其富集机理，为吉林省中、新生代含金属的黑色页岩（油页岩）的综合利用提供参考。 相似文献
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白果园黑色岩系型银（钒）矿床沉积古环境与银（钒）初始富集 总被引：9，自引：0，他引：9
白果园银（钒）矿产于震旦系陡山沱组黑色色岩系中。矿床的地球化学和有机地球化学研究表明，黑色页岩含丰富以低等海生生物为主的腐泥型有机质，黑色页岩形成于局限的滞留海盆。 相似文献
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地质样品经HF—HNO3-HCl-HClO4溶解后，用50g／L碳酸钠溶液浸取分离，采用紫外荧光光谱法直接测定上清液的铀含量。浸取时间选择30min，Fe、Zn、Ca、Co、Ni、Cu和Mn等元素留在残渣中不产生干扰。方法精密度（RSD，n=12）为3．37％～7．06％，检出限为0．009μg／g（进样量100μL）。方法参加区域地球化学考核样品的测试，合格率100％，适用于土壤、水系沉积物、岩石及Fe、Zn、Ca、Co、M、Cu和Mn含量较高的样品中痕量铀的测定。 相似文献
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吉林省中,新生代黑色页岩（油页岩）中某些金属元素富集特征 总被引：3，自引：0，他引：3
吉林省中，新生代黑色页岩（油页岩）中Ａｇ，Ｕ，Ｃｏ，Ｎｉ等元素含量偏高，黑色页岩（油页岩）中古生物组合丰富，有机碳含量很高（＞２％）。研究了吉林省中、新生代黑色页岩（油页岩）中稀、贵金属元素富集特征，初步探讨了其富集机理，为吉林省中，新生代含金属的黑色页岩（油页岩）的综合利用提供参考。 相似文献
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电感耦合等离子体质谱分析仪Inductively Coupled Plasma Mass Spectrometry（ICP—MS）是西安地质调查中心实验测试中心于2006年引进的。电感耦合等离子体质谱分析仪能适用于广泛领域的各种样品的元素分析,尤其适用于各类复杂基体的环境、食品、矿物、动植物、卫生防疫等样品中各种无机元素的分析。 相似文献
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中国南方扬子地区下寒武统黑色页岩分布广泛,主要由黑色页岩、黑色白云质页岩,黑色粉砂质页岩和黑色硅质页岩等组成;并伴生有较厚的磷块岩矿床、钒矿床和镍、钼多元素硫化物矿床。对黑色页岩岩石学特征、元素地球化学特征进行系统研究,并详细分析微量元素的富集成因,结果表明：黑色页岩主要形成于静水还原的浅海-半深海缓坡环境,层状元素富集带为沉积成因,海底热流体提供了丰富物质来源。总体上,Co、Be、Mn、Ga等元素含量较低;Cu、V、Ni、Mo等元素的含量较高,多数超过北美页岩平均值;以Ni、Mo为主的多元素富集层通常位于磷块岩之上,以黑色页岩、黑色白云质页岩中的硫化物和硫酸盐矿物为主要载体,其中有机碳（TOC）含量可达12.2%以上,远高于其他元素富集层,随着页岩内硅质成分增加,Ni、Mo、Fe、Co等元素含量明显降低;以V为主的多元素主要赋存于黑色硅质页岩中的水云母,与页岩内硅质成分具有较好的正相关关系;黑色页岩中稀土元素含量为(76.22~290.67)×10-6,轻重稀土比值LREE/HREE介于1.21~4.22,说明轻稀土更为富集,Sr/Ba值为0.04~0.34,δEu正异常,且北美页岩标准化配分曲线呈现平缓左倾,为沉积过程中存在海底热水流体提供了进一步证据。 相似文献
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华南上扬子区是奥陶纪末生物大灭绝研究的经典地区之一，但由于交通等因素，该区西缘（今昆明—西昌—成都之间）赫南特期浅水相沉积的时空分布规律仍不清楚。文章通过总结近年来的调查新成果与已发表资料，系统分析了研究区赫南特期地层划分对比和古地理，并取得一些新认识。在赫南特早期，研究区以含较凉水壳相动物群（TBF 1）的泥灰岩、灰岩发育为特色，统归入观音桥组（近岸相仅包含其下部）。赫南特中期开始发生明显的相带分异：近岸一侧广泛发育一套含暖水壳相动物群（TBF 2）的生物碎屑灰岩，归于观音桥组上部，向远岸一侧相变为黑色笔石页岩（龙马溪组底部）。至赫南特晚期，近岸的少数地区（如镇雄北部）以产出暖水壳相动物群（TBF 3）的粗碎屑沉积为特色，创名尾坝组；远岸一侧与前一时期类似，以龙马溪组底部黑色页岩沉积为代表。文章还通过综合已知数据，分别对区内赫南特早—中期和晚期古地理进行高精度重建。 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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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141520 Bo Ying(Key Laboratory of Metallogeny and Mineral Assessment,MLR,Beijing 100037,China);Liu Chenglin Saline Spring Hydrochemical Characteristics and Indicators for Potassium Exploration in Southwestern and Northern Tarim Basin,Xinjiang(Acta Geoscientica Sinica,ISSN1006-3021,CN11-3474/P,34(5),2013,p.594-602,5 illus.,3 tables,28 refs.) 相似文献
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正20141243Chen Ge(Hangzhou Research Institute of Petroleum Geology,PetroChina,Hangzhou 310023,China);Si Chunsong Study on Sedimentary Numerical Simulation Method of Fan Delta Sand Body(Journal of Geology, 相似文献
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正20142599Chen Sanming(Guangxi Key Laboratory of Concealed Deposits Exploration,Guilin University of Technology,Guilin541004,China);He Yuzhou Block Model and Reserves Estimation of Panzhihua Iron Deposit Based on 3D Geological Modeling(Journal of Guilin University of Technology,ISSN1674-9057,CN45-1375/N,33(4),2013,p.610-615,9illus.,1table,15refs.) 相似文献
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正20140594 Bai Daoyuan(Hunan Institute of Geology Survey,Changsha 410016,China);Zhong Xiang Faults in the Jingzhou Basin and Their Tectonic Settings(Geotectonica et Metallogenia,ISSN1001-1552,CN44-1595/P,37(2),2013,p.173-183,6illus.,59refs.)Key words:basin evolution,tectonic setting,South China In the Upper Paleozoic and Jurassic se- 相似文献
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正20141912Cao Hui(State Key Laboratory for Continental Tectonics and Dynamics,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)Gravitational Collapse and Folding during Orogenesis:A Comparative Study of FIA Trends and Fold Axial Plane Traces(Geology in China,ISSN1000-3657,CN11-1167/P,40(6),2013,p.1818-1828,9illus.,35refs.,with 相似文献