共查询到20条相似文献，搜索用时 31 毫秒
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风化壳淋积型稀土矿床，在湘南地区普遍发育。具有分布面广、厚度大、品位较富、浸取率高的特点。在风化壳分层中，矿体呈似层状、透镜状赋存于上部、中部，顶部及下部无矿。矿化原岩（花岗岩）含稀土总量０．０６％以上才具找矿价值。 相似文献
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最近,在广东潮州市登塘境内发现花岗岩风化壳离子吸附型稀土矿床。矿床产于葫芦田岩体东部边缘相中粒黑云母花岗岩风化壳内。该岩体为燕山晚期第二次侵入体,花岗岩主要由钾长石、石英、斜长石及黑云母等组成。岩体中稀土元素丰度较高。 矿区风化壳颇为发育,其厚度超过15m,含矿层厚达8m以上。稀土主要富集于风化壳中下部全风化层内。矿体的稀土配分研究表明,铈族氧化物占稀土总量的63.83％,属以轻稀土为主的离子吸附型矿床。 相似文献
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外生稀土矿床的分布、类型和成因概述 总被引：1，自引：0，他引：1
稀土是当今危机资源,勘探和研究稀土矿床是世界热点。外生矿床是重要的稀土来源之一。本文综述了残-坡积、(河流)冲积和海滨砂矿,碳酸盐岩风化壳型,花岗岩风化壳型等稀土矿床地质特征和成因认识。风化壳型稀土矿床是由富稀土的原岩经过地表机械和化学风化作用形成,母岩稀土的最初富集是形成风化壳型稀土矿床的前提,风化壳继承了母岩的稀土特征。目前世界对重稀土的需求最为突出,中国南岭花岗岩风化壳型重稀土矿床为世界之最。风化是后期稀土提炼富集过程,成矿关键在于花岗岩岩浆阶段重稀土矿物的形成。然而,何种因素形成南岭地区具有稀土成矿潜力的花岗岩,富稀土花岗岩表现出的轻重稀土分异是由于源区性质的差异还是源于岩浆演化过程中的分异作用,以及重稀土矿物的形成机制仍有待于研究。 相似文献
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本文研究了盐酸体系中ＣＬ－７４０２萃淋树脂吸附钯的性能与机理。结果表明：在ｐＨ＝２的２ｍｏｌ．１￣－１ＨＣｌ介质中，树脂能迅速、定量地吸附钯，其吸附容量可达２８．７０ｍｇ．ｇ￣－１（干树脂）。树脂对钯的等温吸附式符合Ｑ＝Ｋ．Ｃ；测得吸附热为ΔＨ＝－５．６２ｋＪ．ｍｏｌ￣－１，升高温度对吸附不利。用斜率法确定反应机理为： 相似文献
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512矿床可地浸砂岩铀成矿环境模拟实验 总被引：4，自引：0，他引：4
本文要野外观察取样的基础上建立实验型并完成６组铀、钼、硒的深解和还原实验,取得了１７９个分析数据,实验结果表明,形成层间氧化带强氧化的溶液为酸性含氢溶液。铀沉淀的主要因素是溶液ｐＨ值的改变、ＣＨ４等气体还原及深液中ＳＯ＾２－４与ＨＣＯ＾－３浓度比值的变化。硒与铀、钼不同,可在氧化亚带中沉淀。实验还证明,５１２矿床初始含铀溶液为富钠的酸性溶液,它在强氧化亚带内“驱赶钙”（及铀、钼、硒）,保留硅、铁“ 相似文献
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花垣铅锌矿床成矿流体特征及动态 总被引：23，自引：4，他引：19
花垣铅锌矿床是近年来发现的产于上寒武统清虚洞组藻灰岩－鲕粒灰岩中的大型密西西比型（ＭＶＴ）铅锌矿床。根据矿床中大量流体包裹体的详细研究,成矿流体为高盐度的低温 水,流体报相组分中,Ｈ２Ｏ占有主要部分,ＣＯ２＋ＣＨ４约为５％,１ｇｆｏ２稳定在－４８．０￣－４９．００之间,ｐＨ为４．３￣５．８,Ｅｈ为－０．０７￣－０．１ｅＶ,此外,流体组分中,钠离子的含量大于甲离子,钙离子大于镁离子,而氯离子大于氟离 相似文献
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D401螯合树脂在盐酸介质中对铂,钯的吸附性能及分离研究 总被引：1，自引：0，他引：1
本文研究了在ＨＣｌ介质中，Ｄ４０１螯合树脂对铂，钯的吸附性能。实验表明，在ｐＨ＝２－４范围内，树脂对钯有良好的吸附性能，饱和吸附量７０．５ｍｇＰｄ／ｇ－Ｒ。ｐＨ≥４时对铂不吸附，钯的负载柱可用「０．１ｍｏｌＴｕ＋０．５ｍｏｌｈｃＬ」／Ｌ混合液定量洗脱，洗脱率为９９．２％， 相似文献
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Inter-regional correlation of transgressions and regressions in the Cretaceous period 总被引：1，自引：0，他引：1
T. Matsumoto 《Cretaceous Research》1980,1(4):359-373
Well investigated platforms have been selected in each continent, and the history of Cretaceous transgressions and regressions there is concisely reviewed from the available evidence. The factual records have been summarized into a diagram and the timing of the events correlated between distant as well as adjoining areas.On a global scale, major transgressions were stepwise enlarged in space and time from the Neocomian, via Aptian-Albian, to the Late Cretaceous, and the post-Cretaceous regression was very remarkable. Minor cycles of transgression-regression were not always synchronous between different areas. Some of them were, however, nearly synchronous between the areas facing the same ocean.Tectono-eustasy may have been the main cause of the phenomena of transgression-regression, but certain kinds of other tectonic movements which affected even the so-called stable platforms were also responsible for the phenomena. The combined effects of various causes may have been unusual in the Cretaceous, since it was a period of global tectonic activity. The slowing down of this activity followed by readjustments may have been the cause of the global regression at the end of the Cretaceous. 相似文献
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The Afyon stratovolcano exhibits lamprophyric rocks, emplaced as hydrovolcanic products, aphanitic lava flows and dyke intrusions, during the final stages of volcanic activity. Most of the Afyon volcanics belong to the silica-saturated alkaline suite, as potassic trachyandesites and trachytes, while the products of the latest activity are lamproitic lamprophyres (jumillite, orendite, verite, fitztroyite) and alkaline lamprophyres (campto-sannaite, sannaite, hyalo-monchiquite, analcime–monchiquite). Afyon lamprophyres exhibit LILE and Zr enrichments, related to mantle metasomatism. 相似文献
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正20140751 Guo Xincheng(Geological Party,BGMRED of Xinjiang,Changji 831100,China);Zheng Yuzhuang Determination and Geological Significance of the Mesoarchean Craton in Western Kunlun Mountains,Xinjiang,China(Geological Review,ISSN0371-5736,CN11-1952/P,59(3),2013,p.401-412,8 相似文献
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正20141058 Chen Ling(Key Laboratory of Mathematical Geology of Sichuan Province,Chengdu University of Technology,Chengdu610059,China);Guo Ke Study of Geochemical Ore-Forming Anomaly Identification Based on the Theory of Blind Source Separation(Geosci- 相似文献
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正20141334 Chen Kun(Institute of Geophysics,China Earthquake Administration,Beijing100081,China);Yu Yanxiang Shakemap of Peak Ground Acceleration with Bias Correction for the Lushan,Sichuan Earthquake on April20,2013(Seismology and Geology,ISSN0253-4967,CN11-2192/P,35(3),2013,p.627-633,2 illus.,1 table,9 refs.)Key words:great earthquakes,Sichuan Province 相似文献
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正20141624 Cai Xiongfei(Key Laboratory of Geobiology and Environmental Geology,Ministry of Education,China University of Geosciences,Wuhan 430074,China);Yang Jie A Restudy of the Upper Sinian Zhengmuguan and Tuerkeng Formations in the Helan Mountains(Journal of Stratigraphy,ISSN0253-4959CN32-1187/P,37(3),2013,p.377-386,5 illus.,2 tables,10 refs.) 相似文献
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正20142263Lü Shaojun(Geological Survey of Jiangxi Province,Nanchang 330030,China)Early-Middle Permian Biostratigraphical Characteristics in Qiangduo Area,Tibet(Resources SurveyEnvironment,ISSN1671-4814,CN32-1640/N,34(4),2013,p.221-227,2illus.,2tables,22refs.)Key words:biostratigraphy,Lower Permian,Middle Permian,Tibet 相似文献
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正20142560Hu Hongxia(Regional Geological and Mineral Resources Survey of Jilin Province,Changchun 130022,China);Dai Lixia Application of GIS Map Projection Transformation in Geological Work(Jilin Geology,ISSN1001-2427,CN22-1099/P,32(4),2013,p.160-163,4illus.,2refs.) 相似文献
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正20140692 Duo Tianhui(No.402 Geological Team,Exploration of Geology and Mineral Resources of Sichuan Authority,Chengdu611730,China);Wang Yongli Computer Simulation of Neptunium Existing Forms in the Groundwater(Computing Techniques for Geophysical and Geochemical Exploration,ISSN1001-1749,CN51-1242/P,35(3), 相似文献
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正20140876 Gao Junbo(College of Resources and Environmental Engineering,Guizhou University,Guiyang 550025,China);Yang Ruidong Study on the Strontium Isotopic Composition of Large Devonian Barite Deposits from Zhenning,Guizhou Province(Geochimica, 相似文献