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有色金属(矿山部分):2020,72(2):39-44
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鄂尔多斯盆地东南缘双龙铀矿含矿砂体有机质特征及其与铀矿化的关系
曹惠锋, 刘厚宁, 王军礼, 田亮
(中陕核工业集团地质调查院有限公司)
Organic matter characteristics of ore-bearing body in Southeastern margin of ordos basin Shuanglong uranium mine and its relationship with uranium mineralization
CAO Huifeng, LIU Houning, WANG Junli, TIAN Liang
(Sino Shannxi Nuclear Industry Group Gological Survey Co.Ltd,Shannxi,Xi’an710100)
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投稿时间:2019-06-28    修订日期:2019-10-03
中文摘要: 为解决鄂尔多斯盆地东南缘双龙铀矿铀矿化与有机质的关系,探索以矿点野外露头观察、钻孔岩心观察、矿石电子探针研究以及有机质成熟度测定等方法,对铀矿与有机质的关系进行剖析。初步认为含矿砂体上、下部有机质存在明显差异,上部有机质呈密集分布的细线状、细条状;下部有机质呈粗条状、枝状、块状、粒状,密集程度差,分布不均匀;铀矿化全部赋存在直罗组下段砂体上部,并且受砂体上部细而密集的有机质控制(具体表现为有铀矿化必然存在大量有机质),这部分有机质总体热演化程度较低,具有活性大,孔隙度高,比表面积大的特点,对铀具有很好的吸附作用。但这种吸附不是很牢固,只能形成铀的预富集,还需下部油气和煤层气中的硫化氢对其进行二次富集和还原固矿。通过鄂尔多斯盆地东南缘双龙铀矿铀矿化与有机质的关系研究,对后期该地区铀矿找矿工作有一定的指导作用。
中文关键词: 有机质  铀矿化  砂岩型铀矿  双龙
Abstract:In order to solve the relationship between uranium mineralization and organic matter in Shuanglong uranium deposit in the southeastern margin of ordos basin. To explore the methods of outcrop observation, core observation, electron probe study and maturity determination of organic matter. The relationship between uranium ore and organic matter was studied by observation of outcrop, observation of borehole core, electron probe of ore and maturity of organic matter. It is considered that there are obvious differences in organic matter between upper and lower part of ore-bearing bodies,The sand body contains a lot of organic matter.Thin and dense organic matter in the upper part of the sand body of Zhiluo Group, Coarse and dispersed organic matter in the lower part. And the upper part of organic matter in ore-bearing sandstone was significantly higher than that of lower. At present, the uranium mineralization revealed by the drilling is all assigned to the upper part of the lower sand body of the Zhiluo group. Apparently controlled by thin and dense organic matter in the upper part of the sand body.The overall thermal evolution of this part of organic matter is low, has the characteristics of large activity, high porosity, large specific surface area, and has a good adsorption effect on uranium. But this adsorption is not very solid, only the pre-enrichment of uranium deposits can be formed. In the later stage, it is necessary to H2S the restoration and solidification of it. The study on the relationship between uranium mineralization and organic matter in shuanglong uranium deposit in the southeastern margin of ordos basin is helpful for uranium ore prospecting.
文章编号:     中图分类号:P619.14    文献标志码:
基金项目:中国地质调查局地质调查项目资助“鄂尔多斯盆地东南部黄陵-建庄等地区铀矿地质调查”,项目编号DD20190119-12
引用文本:
曹惠锋,刘厚宁,王军礼,田亮.鄂尔多斯盆地东南缘双龙铀矿含矿砂体有机质特征及其与铀矿化的关系[J].有色金属(矿山部分),2020,72(2):39-44.
CAO Huifeng,LIU Houning,WANG Junli,TIAN Liang.Organic matter characteristics of ore-bearing body in Southeastern margin of ordos basin Shuanglong uranium mine and its relationship with uranium mineralization[J].NONFERROUS METALS(Mining Section),2020,72(2):39-44.

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