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由国际原子能机构和捷克原子能代办处共同主持于1989年9月18日至22日在捷克玛丽亚温泉市召开了“欧洲铀矿资源和铀矿地质讨论会”。出席的国家(代表人数)有捷(11)、法(13)、波(7)、南(4)、西德(3)、英(3)、保(2)、罗(1)、苏(1)、瑞典(1)、芬兰(1)、比(1)、西班牙(1)、葡(1)和中国(1),共宣读了19篇报告,还参观了捷克亚希莫夫铀矿床和普日布拉姆铀矿床陈列馆。欧洲铀矿分布广泛,主要在海西造山带及其地台盖层,苏联、芬兰、瑞典的老地盾,以 相似文献
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粤北下庄铀矿田富铀矿找矿前景探讨 总被引:7,自引:4,他引:7
本文通过对下庄矿田铀矿找矿潜力分析 ,探讨区内富铀矿找矿方向和找矿前景。研究表明 :下庄矿田是铀元素高度富集的矿集区 ,具有较大的找矿潜力和发展前景 ,是粤北富铀矿找矿的重点地区之一 ;区内“交点”型、碱交代碎裂岩型和群脉型铀矿是该区今后找矿的主要目标类型和找矿方向。 相似文献
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东胜铀矿区方解石富集特征、无机碳氧同位素以及邻近气藏包裹体捕获压力、有机碳同位素和~3He/~4He的相关研究表明,东胜铀成矿与深层天然气存在密切关系。方解石的δ~(13)C值-19.6‰~-1.11‰,δ~(18)O值-17.13‰~-9.00‰,δ~(13)C值的变化范围较宽,可能是地表水和深层天然气影响程度不同所致。鄂尔多斯盆地北部气藏储层包裹体捕获压力从深部向浅部和从盆地西南向东北方向逐渐降低的变化趋势表明,天然气为铀的转化提供了充足的还原剂,为大型东胜铀矿形成提供了必要条件。天然气中~3He/~4He比值证明东胜直罗组铀矿砂岩中没有有意义的幔源流体贡献。这些证据表明东胜铀矿砂岩中的方解石是地表水和深部天然气共同作用的结果,这暗示了东胜大型铀矿床是由低温混合成矿作用形成的。 相似文献
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华南铀矿省铀矿构造成矿作用及其时空演化 总被引:2,自引:0,他引:2
华南铀矿省内已发现的工业铀矿床类型有花岗岩型、火山岩型、碳硅泥岩型、碳酸盐岩型和砂岩型。在空间上。铀矿床受环形及线性构造控制,并受上地幔构造制约。幔凸、幔凹阳地幔变异带互相交错,造成本区地幔的极不均一性,这是本矿省成矿的深部地质构造背景。通常铀矿床呈面型成环状分布,大型环形构造控制铀矿省,中型和小型环形构造控制铀矿田和矿床的产出。 相似文献
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腾冲铀矿与盈江铀矿产出的地质背景 总被引:1,自引:0,他引:1
腾冲铀矿和盈江铀矿是世界上首次发现的铀矿物,产出于滇西地区一个混合岩型铀矿化点的氧化带上。本文总结了这类铀矿化的区域地质背景、矿化特征及找矿判别依据。认为变质地体中的深变质带、含矿主岩中铀丰度值高、断裂发育、存在碱交代及气成高温热液蚀变、显示放射性异常等是这类铀矿化的主要找矿判别依据。 相似文献
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1999年,全球轴工业在平淡中走过,全年铀价基本平稳,铀的产生与消同步小幅下降,铀消耗持续大于铀产量,在实际运作中,一些铀业公司赢利,一些亏损,一些倒闭,各铀业公司间的收购,兼并活动增多,跨国铀业公司的实力进一步加强,跨国公司作为经济全球化进程的主要角色,为实施铀资源的全球化配置,纷纷投资海外低成本铀资源的与开发活动,经济效益仍是1999年铀工业的核心,勘查与开发高品位,大矿量的硬岩铀矿是1999年铀工业的主注以,勘查与开发低品位,大矿量的地浸涛岩铀矿则是1999年铀工业的趋势,环保已成为核心电发展和铀工业运作的双刃剑,它既刺激核电发展,又制约铀工业活动,因而在展望未来铀工业时,人们可理智地预测,铀价仍将持续不振,核电发展不量尚难拉动铀的探,采,冶活动,世界铀工业将在希望与困难并存的氛围中搏杀。 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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正1 Introduction Geological studies established on several sections in Lanping-Simao basin have shown that the salt-bearing strata of Mengyejing formation(Yunlong Fm.in Lanping basin)are constituted by an alternation of salt layers and interbedded facies.The latter consists mainly of mudstones,and mudstone-rich conglomerate.The mineralogy and geochemistry of salt-bearing beds and 相似文献
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正On 22nd April 2014,with the approach of the 45th World Earth Day,China’s Ministry of Land and resources issued the status of China’s mineral resources in 2013.The first task of the prospecting breakthrough strategy action implemented in the last five years has been completed,and China’s security capacity for mineral resources has been significantly improved.In the 相似文献
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正There are more than 700 salt lakes with area of more than 1km2 on the Qinghai-Tibet Plateau of China.In recent years,an oilfield brine was also found in the Nanyishan Section of Qaidam Basin in the Qinghai-Tibet 相似文献
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正1 Introduction Physical and numerical models are constructed to investigate the evolution and mechanism of salt migration driven by tectonic processes.In recent years,we have designed and ran series of models to simulate salt 相似文献
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YUAN Qin LI Jianguo QIN Zhanjie WEI Haicheng SHENG Shurong SHAN Fashou 《《地质学报》英文版》2014,88(Z1):276-276
正The study of Cretaceous-Palaeogene salt-bearing strata of the Khorat Basin Laos and the Lanping-Simao Basin in Yunnan,China has an great significance not only in explaining the basin evolution and the genesis of potash 相似文献
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正Potash is one of the long-term scare deposits in China,and potash prospecting has long been listed as a key brainstorm project for our nation and geological prospecting units.There have been considerable studies in search for potash deposits in the Kuqa depression of the Tarim basin(Jackson et al.,1991;Gemmer et al.,2004;Vendeville,2005;Vendeville and Jackson,1992a,1992b), 相似文献
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正1 Introduction Qaidam Basin in Qinghai,including 43 salt lakes with multiple dominant mineral such as potassium,magnesium,lithium etc.,is the most intensive distribution of Saline 相似文献