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山西灵丘支家地热液隐爆银（多金属）矿床成矿机制 总被引：3，自引：0，他引：3
本文从矿床学的角度，对支家地银（多金属）矿床的地质特征、成矿条件及成矿机制进行了系统研究，提出了热液隐爆矿床概念以及与它有关的隐爆构造及引爆热液概念，认为该矿床是一种含矿热液通过隐爆作用而形成的银矿床，即热液隐爆银矿床。 相似文献
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湖南辰溪仙人湾埃洛石型高岭土的矿物学特征与成因简析 总被引：1，自引：0，他引：1
运用化学成分分析、X射线衍射、红外吸收光谱、差热-热重分析以及扫描电镜等研究手段，着重研究了湖南辰溪仙人湾高岭土矿的矿物学特征，并结合矿床的地质成矿特征讨论了其成因机制。研究表明，该矿床除有极少量碎屑状石英以及附着于埃洛石外表面的凝胶成因石英外，以10A埃洛石为主，部分为7A埃洛石；埃洛石为形态完整的管状晶体，管长一般为1．0-1．5μm，外径一般0．05-0．1μm。认为该矿床为古岩溶洞穴胶体沉积型埃洛石矿床。 相似文献
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内蒙大井锡多金属矿床矿石的物质成分及特征 总被引：2，自引：1，他引：2
大井锡多金属矿床是华北地区较大的锡矿床，深入研究该矿床地质、地球化学特征及成矿规律，对我国北方找锡矿工作具有参考对比意义，通过对大井锡矿床的矿物组成、物质成分及矿石结构构造特征的研究，探讨了成矿温度和成矿深度，进而指出该矿床属于次火岩有关的热液矿床。 相似文献
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对浙江东坞山这个新发现的成因不明的银多金属矿进行研究后，认为该矿床的成矿特征与江西银山矿床以及秘鲁基鲁维尔卡矿床相似，该矿床不同于在浙东地区广泛分布的与火山成矿有关的浅成热液型银铅锌矿床。因此，在浙西地区应视为一种新的矿化类型，应用ｘ射线衍射的新技术及电子探针手段，进行矿石全岩分析和蚀变碳酸盐矿物学和金属矿物学研究，测定矿床形成的温度、硫逸度、氧逸度，并以金属矿物共生组合变化为依据，探讨蚀变标志、金属矿物组合以及矿化分好的规律性。 相似文献
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通过对陕西银硐子沉积型银铅多金属矿床成矿的古构造，古地理环境以及矿床的含矿岩系的岩石，矿石，矿物成分，微量元素、稀土元素、铅同位素等地球化学特征的研究，并与国外某些海底喷气沉积铅锌矿床相比较，发现它们具有相似的地质，地球化学特征，表明该矿床是正常海相沉积与海底喷气沉积相掺合而形成的，是具有较大经济价值的银铜锌贱金属－贵金属综合矿床。 相似文献
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本文介绍了和顺县松烟镇关家峪石榴子石成矿地质背景、矿体特征、矿床成因以及找矿标志。由于矿区具有典型的火山一沉积区域变质岩矿床特征和完整的成矿过程,将对该类型的其他石榴子石矿床的研究提供参考。 相似文献
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河南秋树湾铜(钼)矿床成因探讨 总被引：7，自引：2，他引：7
通过对秋树湾铜(钼)矿床地质特征的详细研究，着重对其成因进行相关研究和对比。结果表明，秋树湾铜钼矿化与花岗闪长斑岩在矿化蚀变分带特征、稳定同位素特征、稀土元素分布模式等方面具有成因联系，并符合斑岩型铜矿床的一系列特征。认为该矿床是复合斑岩型铜(钼)矿床，指出矿床及其外围具有大型规模找矿潜力。 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