共查询到20条相似文献，搜索用时 2 毫秒
1.
河南水洞岭铜多金属矿床地球化学异常特征及找矿标志 总被引：3，自引：0，他引：3
水洞岭铜多金属矿床的岩石和土壤地球化学试验研究,表明岩石和土壤中Ｃｕ、Ｐｂ、Ｚｎ、Ａｓ、Ｓｂ、Ｈｇ、Ｃｄ、Ｂｉ、Ｍｏ元素异常清晰,含矿岩系地球化学演化与元素组合变化的一致性,提出Ｃｕ、Ｐｂ、Ｚｎ、Ａｓ、Ｓｂ、Ｈｇ、Ｃｄ、Ｂｉ、Ｍｏ元素可以作为指示元素,并建立了矿床的岩石、土壤地球化学异常概念模式。 相似文献
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中低温含硫,氯水溶液对地层中金,锑,汞,砷的淋滤实验研究 总被引：3，自引：1，他引：3
本文针对湘西低温矿化集中区的地质实际，在１００－３００℃，４００ＭＰａ压力条件下，进行了含硫、氯中－低温熔液对地层岩石中金、锑、汞、砷等的多元素淋滤实验研究。实验结果表明，温度、配合物的种类和浓度是控制元素活化能力的重要因素。实验得出了Ｈｇ－Ｂｓ－Ａｕ－Ａｓ的活化序列，认为２００－２５０℃的富硫低氯热液是金、锑矿化的有利条件，低温低硫富氯热液有利于汞矿化。据实验结果并结合含矿建造及包裹体地球化学的 相似文献
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贵州西南地区高砷煤与低温元素矿化的关系 总被引：9，自引：1，他引：9
贵州西南地区高砷煤产于上二叠统龙谭组。高砷煤形成与Ａｕ、Ａｓ、Ｈｇ、Ｓｂ等低温元素矿化有着密切的成因联系，这对于研究高砷煤的形成并通过高砷煤提供Ａｕ、Ａｓ、Ｈｇ、Ｓｂ等矿化线索有其重要意义。 相似文献
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本研究成果建立在对产于晚太古代录岩带中的５５个中温热液金矿床的１３７个大样的约７０种元素的分析基础上，尺管这些矿床在成矿省和单外矿床的元素共生组合和富集上有明显差别，但总体来看，Ａｕ，Ｔｅ，Ｓ，Ａｓ，Ｗ，Ｂｉ，Ａｇ和Ｓｅ依然是金矿勘探中最重要的元素，Ｔｅ，Ａｓ，Ｂｉ和Ｓｅ的富集一般大于玄武岩平均丰度的１０００－１００倍，Ｗ、Ｓ和Ａｇ的富集系数则为１００－１０。Ｓｂ，Ｂ，Ｍｏ，Ｃｕ，Ｕ，Ｈｇ，Ｐｂ， 相似文献
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在详细地质研究基础上,分析了研究区变质岩－花岗岩区２８种岩石Ａｕ、Ａｇ、Ｃｕ、Ｐｂ、Ｚｎ、Ａｓ、Ｓｂ、Ｈｇ,获得了岩石的元素丰度及研究区元素丰度;并以浓集克拉克值（研究区）和变异系数为主,讨论了不同岩类岩石微量元素丰度及其特征,提出了寻找金银多金属矿、特别是判断有关地球化学异常找矿意义的建议。 相似文献
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原子荧光光谱法直接连续测定化探样品中的As Sb Bi Hg 总被引：7，自引：1，他引：6
研究了还原性介质中原子荧光光谱法直接连续测定化探样品中Ａｓ、Ｓｂ、Ｂｉ、Ｈｇ的方法。按拟定的条件进行测定,各元素的检出限分别为Ａｓ２．９×１０－９、Ｓｂ１．３×１０－１０、Ｂｉ１．８×１０－１０、Ｈｇ５×１０－１１。应用于区域化探扫面工作中,效果良好。 相似文献
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原子荧光光谱法快速测定锌精矿中汞,砷,锑 总被引：8，自引：1，他引：7
研究拟定了不经分离富集,直接测定锌精矿中Ｈｇ、Ａｓ、Ｓｂ的原子荧光光谱法。适用于锌精矿中０￣０．１２５％的Ｈｇ;０￣０．５％的Ａｓ及０￣０．１％的Ｓｂ的测定,方法简便、快速,结果令人满意。 相似文献
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金青顶为一大型石英脉型金矿床。１９８７年研究了－４００ｍ标高以上矿体原生晕特点,预测Ⅱ号矿体向下有很大延深,经钻探证实实矿体延深到－７００ｍ,表明金青顶金矿床Ａｕ元素具有多中心富集和多阶段成矿成晕叠加特点,从而建立金青顶金矿床的叠加成矿成晕模式,表明在有Ａｕ异常存在条件下,Ａｓ、Ｈｇ、Ｓｂ前缘晕元素异常指标深部存在盲矿体;当前缘晕指示元素Ａｓ、Ｈｇ、Ｓｂ异常与尾晕元素Ｂｉ、Ｍｏ、Ｍｎ异常共存,指示 相似文献
10.
陕西凤县八方山多金属矿床成矿成晕模式 总被引：5，自引：0，他引：5
方维萱 《有色金属矿产与勘查》1997,6(3):167-171
方山多金属矿床产于中泥盆统星红铺组，古道岭组。指示元素有Ｃｕ、Ｐｂ、Ｚｎ、Ａｇ、Ｃｄ、Ｈｇ、Ａｓ、Ｓｂ、Ａｕ、Ｂａ、Ｓｒ、Ｂ等，原生异常的轴向分带序列（从上到下）：Ｚｎ－Ｈｇ－Ｐｂ－Ａｇ－Ｃｕ１－Ｂａ－Ｓｒ－Ｓｂ－Ａｓ－Ｃｕ２、Ｎｉ、Ｃｏ、Ａｕ，具有明显多建造晕的特点。八方山多金属矿床是由海底喷流（汽）同生沉积－叠加、再造作用形成的。 相似文献
11.
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
12.
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
13.
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
14.
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20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level 相似文献
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正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7), 相似文献
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正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci- 相似文献
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正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli- 相似文献
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正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.) 相似文献