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鄂尔多斯盆地东胜砂岩型铀矿床成矿条件分析

发表时间:2008-01-15  浏览量:1632  下载量:649
全部作者: 朱卫平,吴仁贵,章永梅
作者单位: 中国国土资源航空物探遥感中心;东华理工大学;中国地质大学(北京)
摘 要: 通过成矿地质条件分析,表明鄂尔多斯盆地东胜砂岩型铀矿床具备良好的成矿地质条件。赋矿层位形成时的构造背景相对稳定,形成后则处于长期隆起剥蚀的次造山背景,在盆地演化过程中形成了有利的“三层结构”,具备了铀成矿有利的区域背景条件。赋矿砂体形成于温暖潮湿古气候条件,砂体中存在丰富的还原介质,并且具有良好的泛连通性、成层性和渗透性。下伏延安组湖相泥岩和上覆直罗组上段曲流河洪泛沉积的组合构成有利于铀成矿的沉积地层结构。另外,蚀源区丰富的铀源,普遍发育的氧化作用,均为铀成矿的有利条件。
关 键 词: 砂岩型铀矿,成矿条件分析,鄂尔多斯盆地,东胜地区
Title: The minerization conditions of Dongsheng sandtone type uranium deposit in Ordos basin
Author: ZHU Weiping, WU Rengui, ZHANG Yongmei
Organization: China Aero Geophysical Survey&Remote Sensing Center for land and Resources;East China Institute Technology;China University of Geoscience (Beijing)
Abstract: Study on mineralization conditions indicates that the sandstone type uranium of Dongsheng deposits have favorable mineralization conditions. The tectonic background was relatively stable when the ore-bearing strata formed; and later it was in the uplifting and denuding sub-tectonic setting, the favorable ‘three-layered Structure’ formed during the evolution of the basin. All these conditions as the area background contribute to the formation of uranium ore deposits. The ore-bearing sand body was formed in the warm and moist climate, contained abundant reducing medium, and had faborable connectivity, stratification and permeability. Yan’an formation the lake facies mudstone of underlying and meander river inundation sedimentarty of overlying Zhiluo formation form the favorable sedimentary strata structure for uranium mineralization. Meanwhile, the abundant uranium sources of the source district and the wide development of oxidation form the advantaged uranium mineralization conditions.
Key words: Sandstone type uranium deposit, metallogenic conditions, the Ordos Basin, Dongsheng Area
发表期数: 2008年5月第1期
引用格式: 朱卫平,吴仁贵,章永梅. 鄂尔多斯盆地东胜砂岩型铀矿床成矿条件分析[J]. 中国科技论文在线精品论文,2008,1(1):98-103.
 
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