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合理的划分矿床勘探类型,是矿床勘探工作的重要内容之一。目前,对不同的矿床勘探类型一般都采用定性划分方法,故常常出现分类模式与实际的矿床地质特征不能完全吻合的情况。笔者从影响矿床勘探类型的主要因素入手,试用模糊综合评判法进行定量划分,以求克服前述弊端。由于矿床的勘探类型以及区分不同类型的各因素都具模糊概念,加之诸因素对类型划分的影响程度亦不一样。所以,应用模糊综合评判进行矿床勘探类型的划分,不仅有其需要,而且有可能实现。 相似文献
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二、白云母矿床的地质普查与勘探方法白云母矿床工业类型的划分矿床工业类型的划分是勘探设计的前提。具工业价值的白云母矿床属伟晶岩型。在以往划分的工业类型中多过于繁杂。1955年底笔者参考了马尔科夫在全苏储委规范中所制定的云母工业类型,并根据丹巴矿床特征,将白云母矿床的工业类型划分为两大类,四亚类。 相似文献
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中国铅锌矿床成矿规律概要 总被引:21,自引:0,他引:21
中国铅锌资源十分丰富,目前全国铅锌矿产地数据3000多处,铅锌金属储量1亿多吨,铅锌储量均居世界第二位。鉴于铅锌矿床的分类一直以来极具争议,应矿产资源定量预测需求建立了铅锌矿床预测类型分类方案,并将成因类型和工业类型结合,提出了以成矿作用为一级要素,容矿围岩为二级要素的5类13亚类铅锌矿床类型划分方案。总结了全国铅锌矿床时空分布规律,提出多期次、多旋回的造山带环境是铅锌矿床发育的最有利部位,元古代是火山岩型矿床发育的主要时期,古生代是沉积型铅锌矿床发育的重要时期,中、新生代是岩浆型铅锌矿床发育的全盛期。在此基础上,分析了构造演化与铅锌成矿的关系,并提出了成矿时代确定、成矿关键地质要素厘定、构造环境分析等因素是影响成矿类型划分、时空分布规律研究重要因素。 相似文献
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本文通过矿床地质勘探工作,总结经验提高认识水平,对于如何合理划分勘探类型,选定合适的勘探网度,正确部署勘探工程,以保证规范要求的勘探程度,缩短勘探周期,取得较好的社会经济效益方面进行了探讨。矿床勘探类型的划分,取决于矿体(层)本身稳定程度,构造复杂程度不是划分勘探类型的依据。构造应按矿床勘探各储量级别的要求进行勘探控制研究。矿床勘探程度中对各级储量比例以及勘探深度要求,勘探类型的合理确定是关系矿床勘探周期,提高社会经济效益的重要因素。矿床勘探程度,应以矿山(井)开采规模、服务年限确定。 相似文献
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矿床成因类型对铅锌矿床勘查类型划分的影响 总被引:1,自引:0,他引:1
勘查类型是地质资源评价的基础,勘查类型的划分决定了前期地质勘查工作资金投入以及后期地质找矿勘探工作的效果。目前国内铅锌矿床勘查类型的划分依据为主要矿体规模、主要矿体形态及内部结构、矿床构造影响程度、主矿体厚度稳定程度和有用组分分布均匀程度等五大类地质因素,在十几年的实践中,证明了其可行性,但随着实践的累积,发现其也存在一定的局限性。本文总结了前人对湖南省铅锌矿床成因类型的研究,总结提出了湖南省铅锌矿矿床成因类型的三分法,并在影响勘查类型的五大类地质因素的基础上,探讨了矿床成因类型对勘查类型划分的重要性。提出在铅锌矿床勘查类型划分原则中增加矿床成因类型因素,根据其在影响因素中的比重,赋予类型系数。根据调整后的勘查类型系数,选取22个湖南省典型铅锌矿床,对其勘查类型进行了重新划分,划分结果显示,有4个矿床的勘查类型发生了变化,包括桃林、董家河、低炉铅锌矿和野鸡尾铅锌矿。并通过桃林铅锌矿实例证明了,调整的勘查类型数值更符合实际,即能较好的控制矿体,又节省了大量的前期勘查投入资金。本文的研究探讨了影响地质勘查类型的多种可能性,也希望引起大家对矿床合理性勘查的重视。 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