| 湖相泥岩型铀矿有利成矿条件分析 |
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| 引用本文： | 宋霁,焦养泉,吴立群,汪小妹.湖相泥岩型铀矿有利成矿条件分析[J].地质科技通报,2015,34(5):120-126. |
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| 作者姓名： | 宋霁 焦养泉 吴立群 汪小妹 |
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| 作者单位： | 中国地质大学构造与油气资源教育部重点实验室, 武汉 430074 |
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| 基金项目： | 国家自然科学基金项目(40772072)国家重点基础研究发展计划“973”项目(2015CB453003)核工业二〇八大队协作项目“二连盆地额仁淖尔凹陷泥岩型铀矿形成发育的沉积学背景研究” |
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| 摘 要： | 近年来,在中国的二连盆地和鄂尔多斯盆地先后发现了湖相暗色泥岩中出现铀元素的异常富集且达到工业品位。为了进一步研究和开发湖相泥岩型铀矿,通过对国外黑色页岩型铀矿和湖相泥岩型铀矿研究成果的总结与分析,并结合目前对中国二连盆地努和廷铀矿、鄂尔多斯盆地南部延长组烃源岩铀富集已进行的初步勘查工作,认为湖相泥岩型铀矿成矿的有利条件包括:①充足且持久的铀源;②高含量的吸附剂与还原剂,吸附剂主要包括有机质和磷酸盐,还原剂主要为有机质和以黄铁矿为代表的硫化物;③低沉积速率和持续时间较长的缺氧环境;④氧化还原环境的突变,氧化还原边界的位置会直接影响铀成矿的位置;⑤有利的古地理条件,包括相对稳定的持续隆起的正地形和干旱、半干旱与潮湿周期性交替的气候。
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| 关 键 词： | 泥岩型铀矿 湖相 成矿条件 |
| 收稿时间： | 2014-12-03 |
Analysis of Advantageous Minerogenic Conditions of Lacustrine Mudstone-Type Uranium Deposit |
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| Affiliation: | Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Wuhan 430074, China |
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| Abstract: | In recent years,the uranium enrichment in the lacustrine dark mudstone of production grade,has been discovered in the Ordos Basin and Erlian Basin of China.The present paper describes the study of this lacustrine mudstone-type uranium deposit further by summarizing and analyzing the researches of black shale-type uranium deposits and the lacustrine mudstone-type uranium deposits in foreign countries combined with preliminary exploration on the Nuheting uranium deposits in the Erlian Basin and the uranium enrichment in southern Ordos Basin.The advantageous minerogenic conditions of the lacustrine mudstone-type uranium deposit are:①The existence of sufficient and sustainable uranium source.②High levels of adsorbents and reducing agents,with the adsorbents mainly including organic matter and phosphate,and the reducing agents mainly of organic matter and some sulfide represented by pyrite.③Low deposition rate and the longer anoxic sedimentary environment.④The mutation of the redox environment,the redox boundaries directly affecting the position of uranium mineralization.⑤Advantageous paleogeographic conditions,including relatively stable positive landform uplifting continuously and periodic alternating climate. |
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