共查询到20条相似文献，搜索用时 62 毫秒
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湘黔汞矿带为我国重要矿成矿带,矿床的数量,质量,规模及储量均居全国首位区域成矿规律性强,控矿因素明显,其找矿远景仍然乐观,本文着重了区域汞矿成矿地质背景,矿源层,变晶白云岩与成矿和汞锌分 带等与汞矿找矿评价直接相关成矿问题,以及其他问题,并提出了作者的看法。 相似文献
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成矿系列研究若干问题讨论 总被引：4，自引：1，他引：4
本文讨论了成矿系列的概念、划分原则、含矿建造、形成时代、联系纽带、形成模式及叠加复合等问题,探讨了成矿区(带)划分和成矿系列的关系及如何运用成矿系列理论指导找矿的问题,分析了今后成矿系列研究的发展趋势。 相似文献
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从矿床构造、岩浆活动和含矿地层等方面论述金山金矿床形成的地质条件、矿床成因和成矿作用 ,揭示该矿床沿北东东向韧性剪切带及其伴生的次级构造成矿规律 ,指出了今后的找矿方向 相似文献
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中国银矿资源丰富,矿床类型多样,找矿潜力巨大。文章运用成矿系列的理论和方法,对中国银矿床进行了成矿系列和成矿谱系的初步研究,并将其初步划分为38个银矿床成矿系列(组),59个亚系列。结合区域地质构造演化与各成矿系列的演化关系归结出中国银矿床成矿谱系。研究表明,中国银矿床成矿系列结构及演化具有时空不均衡性、银矿床类型演化渐趋多样化、矿石建造类型演化渐趋复杂化等特点,文章指出了成矿系列和成矿谱系研究对全国银矿理论研究和找矿实践的指导意义,并结合银矿床成矿系列和成矿谱系特点分析了银矿床今后找矿的具体方向。 相似文献
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阿尔金成矿带成矿单元划分及成矿系列探讨 总被引：2，自引：0，他引：2
阿尔金成矿带地处新疆、青海和甘肃三省的衔接部位,是我国西部重要的铁、铅、锌、金、铜等矿产资源重点勘查区之一,也是全国矿产资源潜力评价项目划分的Ⅲ级成矿单元之一。笔者以地层、构造、岩浆岩带和相关的成矿作用为标志,将阿尔金成矿带进一步划分为3个Ⅳ级成矿单元(成矿亚带),并概述了各Ⅳ级成矿单元的地质矿产特征;在此基础上,按照杨合群等(2012)提出的与各类地质建造有关的成矿系列细化为同生成矿系列、准同生成矿系列、后生成矿系列和表生风化成矿系列,构建了阿尔金成矿带的11个成矿系列家族和16个成矿(或矿化)系列,这将对该区域今后的找矿和勘查工作具有一定的指导作用。 相似文献
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《地学前缘》2017,(5):54-61
江西银坑矿田位于南岭—武夷山—赣东北三大成矿带交汇斜接部位,以同时发育钨多金属矿床和银金铅锌锰矿床组合为特色,是南岭地区最重要的贵金属找矿远景区之一。近年来,在成矿系列理论指导下,银坑矿田在破碎带热液脉型贵金属找矿方面取得重要突破,在陆内成矿理论创新方面取得了重要进展。本文系统总结了银坑矿田两类矿床的时空分布规律、成矿期次与控矿要素,结合南岭科学钻探两类矿化的垂向分带特征,阐明了两类矿化组合在三维空间内的分带性,在成矿时间上的集中性(150~160 Ma),是华南中生代两类矿床成矿系列(南岭与花岗岩有关钨锡矿床成矿系列和赣东北与花岗闪长岩有关贵金属成矿系列)在银坑地区时空四维尺度的叠加。按成矿系列之"全位成矿与缺位找矿"理论,进一步指明了银坑地区的找矿方向,即应围绕江背复式岩体在内带寻找张家地式、在接触带寻找岩前式和狮吼山式、在外带寻找画眉坳式钨多金属矿床;在银坑—青塘盆地内围绕推覆构造上下盘开展贵金属找矿,重点部署推覆构造界面内和脉体收敛方向深部的厚大矿体勘查,在高山角和井笔山外围探索斑岩型-爆破角砾岩型矿化规模。 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