共查询到20条相似文献，搜索用时 343 毫秒
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《矿物岩石地球化学通报》1997,(4)
新书要览四川大水沟碲（金）矿床地质和地球化学陈毓川、毛景文等，原子能出版社，１９９６，１６Ｋ，ｐ１４５大水沟碲（金）矿床是世界首例以碲为主的矿床。本书全面系统地论述了该矿床的地质特征、成矿地质背景及矿床形成机制；提出了多级地幔柱演化与成矿模式。在矿床... 相似文献
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遥感地质在矿床勘查中的应用研究已成为遥感技术转化为矿床勘查经济效益的关键问题。因此，国内外均从遥感地质的不同侧面开展了矿床方面的遥感地质研究。矿床遥感地质学是遥感地质学和矿床学的交叉学科，正在矿床勘查的遥感地质应用中逐渐应用和发展。 相似文献
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俞 《四川地质科技情报》1994,(1):42-43
任何矿床的形成都是各种地质作用的综合效应，超大型矿床也不能例外。控制超大型矿床形成的地质因素及标志必然在地质、地球化学和地球物理综合信息上得到反映，形成地质异常和物化探异常。因此，应用地质异常理论和综合信息方法探索超大型矿床的特殊性是可行的预测途径。 相似文献
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湖南康家湾隐伏铅锌金银矿床地质地球化学特征 总被引：1，自引：0，他引：1
吴永芳 《有色金属矿产与勘查》1995,4(2):96-99,107
笔者从宏观地质特征、矿石镜下特征、包裹体分析入手，结合数学地质，物理化学等方法，阐述了康家湾隐伏铅锌金银矿床地质地球化学特征，建立了适合该类矿床的地质地球化学找矿标志。 相似文献
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浙东南地区次生石英岩型红柱石矿床为一种新的矿产类型，本简要地总结该类矿床的地质特征和矿床特征，探讨了成矿地质条件和矿床成因，认为该类型红柱石矿床是由火山岩经火山热液蚀变形成次生石英岩，然后经热接触变质作用，致使部分铝硅酸盐矿物脱水分解形成红柱石矿床。 相似文献
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洞子沟银（金铜）矿床地质物征及成矿机制探讨 总被引：10，自引：0，他引：10
杨昌正 《有色金属矿产与勘查》1996,5(2):75-80
本文概述了洞子沟银（金铜）矿床的地质背景和矿床地质特征，粗略地划定了成矿时代，探讨了成矿物质来源，成矿作用，成矿机制及矿床成因，划出四个找矿靶区。 相似文献
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粤东北嵩溪银锑矿床地质地球化学初步研究 总被引：5，自引：0，他引：5
粤东北嵩溪银锑矿床地质地球化学初步研究肖振宇郑庆年（广东有色金属地质勘查院，广州５１００８０）陈繁荣张湖（中国科学院广州地球化学研究所，广州５１０６４０）关键词地质地球化学银锑矿床嵩溪嵩溪银锑矿床发现于粤东北地区，有嵩溪、黄沙塘等矿床和梅子坑、仙客社... 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