| 鄂尔多斯盆地南缘彬县地区铀成矿关键时期的古地貌特征 |
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| 引用本文： | 贺锋,张字龙,刘红旭,李平,李亚锋,殷龙飞.鄂尔多斯盆地南缘彬县地区铀成矿关键时期的古地貌特征[J].地质通报,2017,36(4):527-533. |
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| 作者姓名： | 贺锋 张字龙 刘红旭 李平 李亚锋 殷龙飞 |
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| 作者单位： | 1. 核工业北京地质研究院, 北京 100029;2. 中核集团铀资源勘查与评价技术重点实验室, 北京 100029;3. 核工业二〇三研究所, 陕西 咸阳 712000 |
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| 基金项目： | 中核集团青年科技创新团队项目《鄂尔多斯盆地东南缘油气耗散与铀成矿的时间配置关系研究》（编号：地HQX1601）、中核集团集中研发项目《鄂尔多斯盆地南部砂岩型铀矿关键因素识别与靶区优选》（编号：2016地LTD1601-3）、中国核工业地质局项目《鄂尔多斯盆地南缘铀成矿地质特征与远景评价》（编号：201586）、国家973项目《北方典型产铀盆地成矿机理与成矿模式》（编号：2015CB453004） |
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| 摘 要： | 中侏罗世为直罗组下段沉积期,辫状河道为有利的铀储层砂体,铀矿(化)体主要赋存于辫状河砂体中,受沉积古地貌控制,主要发育在低洼区。晚侏罗世、早白垩世-古新世、始新世-中新世是砂岩型铀成矿期,古地貌控制了地下古水流的流向,控制着氧化还原带的分布和铀矿的富集:晚侏罗世铀预成矿期,古隆起区受到潜水淋滤,含铀物质向斜坡和低洼区迁移;早白垩世-古新世铀主成矿期,古地貌控制了含氧含铀水的水流方向,氧化还原带主要分布在古地貌斜坡区。
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| 关 键 词： | 古地貌特征 沉积期 成矿期 铀成矿 |
| 收稿时间： | 2016/10/14 0:00:00 |
| 修稿时间： | 2017/2/4 0:00:00 |
Palaeogeomorphologic features in the critical period of uranium mineralization in Binxian area, southern Ordos Basin |
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| HE Feng,ZHANG Zilong,LIU Hongxu,LI Ping,LI Yafeng and YIN Longfei.Palaeogeomorphologic features in the critical period of uranium mineralization in Binxian area, southern Ordos Basin[J].Geologcal Bulletin OF China,2017,36(4):527-533. |
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| Authors: | HE Feng ZHANG Zilong LIU Hongxu LI Ping LI Yafeng and YIN Longfei |
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| Institution: | 1. Beijing Research Institute of Uranium Geology, Beijing 100029, China;2. CNNC Key Laboratory of Uranium Resource Exploration and Evaluation Technology, Beijing 100029, China;3. No. 203 Research Institute of Nuclear Industry, Xianyang 712000, Shaanxi, China |
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| Abstract: | During Middle Jurassic period, i.e., the sedimentary period of Lower Zhiluo Formation, the braided channel was a favor-able sand body of uranium reservoir that hosted uranium, and uranium was mainly controlled by palaeogeomorphology and mainly developed in low-lying areas. The Late Jurassic, Early Cretaceous-Paleocene and Eocene-Miocene were main uranium mineralization stages. Palaeogeomorphology controlled the migration of underground water, the distribution of the redox zone and the enrich-ment of uranium deposits. During the Late Jurassic uranium pre-mineralization period, diving leaching caused the migration of uranium-bearing materials from the uplift to the slope and low-lying areas; during the main uranium mineralization period of Early Cretaceous-Paleocene, palaeogeomorphology controlled the direction of the water flow with oxygen and uranium, and the redox zone was distributed mainly in the slope area of the ancient landform. |
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| Keywords: | palaeogeomorphology sedimentary period mineralization period uranium mineralization |
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