| 松辽盆地白城-开鲁地区新近系地浸砂岩铀成矿后生还原条件分析 |
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| 引用本文： | 张振强,寇大明,金成洙.松辽盆地白城-开鲁地区新近系地浸砂岩铀成矿后生还原条件分析[J].地质与资源,2006,15(4):281-285. |
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| 作者姓名： | 张振强 寇大明 金成洙 |
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| 作者单位： | 1. 东北大学 资源与土木工程学院, 辽宁 沈阳 110004;2. 核工业二四〇研究所, 辽宁 沈阳 110032 |
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| 摘 要： | 铀的沉淀、富集与还原剂种类、含量有密切关系.还原剂主要包括有机质、黄铁矿、油气等.白城-开鲁地区新近系有机炭、黄铁矿含量总体较低，有机质腐殖化程度弱，但深部油气上升可进入新近系下部的大安组砂体，在某种程度上弥补岩石还原物质的不足.从后生氧化类型看，大安组具有层间氧化特点，具有形成铀矿床的前提，但从砂岩的黏土化蚀变成分看，高岭石含量比伊犁盆地成矿地层明显偏低，说明含氧化水相对较弱，铀成矿条件略差.这从某种程度解释了松辽盆地西南部新近系找矿无重大突破的原因.
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| 关 键 词： | 白城-开鲁地区 新近系 后生还原蚀变 砂岩型铀成矿 |
| 文章编号： | 1671-1947（2006）04-0281-05 |
| 收稿时间： | 2005-03-07 |
| 修稿时间： | 2006-08-23 |
ANALYSIS ON THE EPIGENETIC REDUCING CONDITIONS OF NEOGENE IN-SITU LEACHABLE SANDSTONE URANIUM DEPOSITS IN BAICHENG-KAILU AREA OF SONGLIAO BASIN |
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| ZHANG Zhen-qiang,KOU Da-ming,JIN Cheng-zhu.ANALYSIS ON THE EPIGENETIC REDUCING CONDITIONS OF NEOGENE IN-SITU LEACHABLE SANDSTONE URANIUM DEPOSITS IN BAICHENG-KAILU AREA OF SONGLIAO BASIN[J].Geology and Resources,2006,15(4):281-285. |
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| Authors: | ZHANG Zhen-qiang KOU Da-ming JIN Cheng-zhu |
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| Institution: | 1. School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China;2. No. 240 Institute of Nuclear Industry, Shenyang 110032, China |
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| Abstract: | Uranium precipitation and concentration are closely related to the t ypes and content of reducing agent, such as organic material, pyrite, oil and ga s. The content of organic carbon and its humic acid and pyrite in Neogene System in Baicheng-Kailu area is not enough for uranium mineralization. However, the oil and gas in deep layer may pierce into the sand body of Neogene Da an formati on to make up the low content of reducing material of sandstone. As regards the oxidation, Da'an formation belongs to phreatic-interformational type, which pro vides basic conditions for sandstone type of uranium deposit. However, the conte nt of kaolinite is lower than that of the ore-bearing formation in Yili Basin, indicating weak oxygenic water and metallogenetic conditions. In some extent, it explains why large-scale Neogene uranium deposits in Songliao basin are not fo und so far. |
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| Keywords: | Baicheng-Kailu area Neogene System epigenetic reduction sandston e type of uranium mineralization |
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