| 花岗岩演化与铀钍元素富集的关系:以粤北贵东岩体为例 |
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| 引用本文： | 娄峰,李宏卫,陈光明,敖文波,赖中信,卢映新,杨燕娜.花岗岩演化与铀钍元素富集的关系:以粤北贵东岩体为例[J].地学前缘,2011,18(1):110-117. |
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| 作者姓名： | 娄峰 李宏卫 陈光明 敖文波 赖中信 卢映新 杨燕娜 |
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| 作者单位： | 1中山大学 地球科学系, 广东 广州 510275
2广核 中大花岗岩与铀矿资源研究所, 广东 广州 510800 |
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| 基金项目： | 高等学校博士学科点基金，广东省核工业地质局项目 |
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| 摘 要： | 对粤北贵东岩体铀钍丰度变化特征的研究表明,原地重熔过程导致铀钍元素向花岗岩体的上方汇聚富集,并造成铀、钍元素在空间上的分离,即在花岗岩体中,铀的丰度带位处钍丰度带之上。陆壳多次原地熔融(重熔)不但导致复式花岗岩体形成,同时造成铀元素在晚期岩体中的富集。贵东岩体内燕山早期岩体铀钍含量的东西差异被认为与卷入熔融的铀源层(寒武-震旦系)的初始埋深有关,而复式岩体铀含量的南北差异,则被解释为与晚期重熔界面倾斜方向所导致的晚期岩体的剥蚀深度有关。高铀含量和高铀钍比值并存往往是晚期岩体埋深较浅的表现,对于深部隐伏矿床的寻找有重要指示作用。
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| 关 键 词： | 铀钍丰度 原地重熔 复式岩体 粤北 |
| 收稿时间： | 2010-11-01 |
The relationship between granite evolution and uranium-thorium enrichment:An example from the Guidong granite body,North Guangdong Province |
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| Lou Feng,Li Hongwei,Chen Guangming,Ao Wenbo,Lai Zhongxin,Lu Yingxin,Yang Yanna.The relationship between granite evolution and uranium-thorium enrichment:An example from the Guidong granite body,North Guangdong Province[J].Earth Science Frontiers,2011,18(1):110-117. |
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| Authors: | Lou Feng Li Hongwei Chen Guangming Ao Wenbo Lai Zhongxin Lu Yingxin Yang Yanna |
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| Institution: | 1Department of Earth Sciences, Sun Yat Sen University,Guangzhou 510275, China;
2GH ZD Institute of Granite and Uranium Resource Studies, Guangzhou 510800, China |
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| Abstract: | The study of variations of uranium and thorium abundances in the Guidong granite body suggested that the in-situ melting resulted in enrichment of uranium and thorium elements at the top of the crustal granite layer,and caused spatial separation of the two elements which is shown by the fact that the maximal abundance zone of uranium in a granite body is generally located over that of thorium.Multiple in-situ melting led not only to the formation of a composite granite body(CGB),but also to the enrichment o... |
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| Keywords: | uranium and thorium abundances in-situ melting composite granite body(CGB) North Guangdong Province |
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