| 粤北下庄335矿床成矿时代的厘定——来自LA-ICP-MS沥青铀矿U-Pb年龄的制约 |
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| 引用本文： | 邹东风,李方林,张爽,黄彬,宗克清.粤北下庄335矿床成矿时代的厘定——来自LA-ICP-MS沥青铀矿U-Pb年龄的制约[J].矿床地质,2011,30(5):912-922. |
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| 作者姓名： | 邹东风 李方林 张爽 黄彬 宗克清 |
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| 作者单位： | 1. 中国地质大学研究生院,湖北武汉,430074
2. 中国地质大学地球科学学院,湖北武汉,430074 |
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| 基金项目： | 本文得到南岭贵东花岗岩体构造变形与铀矿成矿关系研究(2009016103)项目资助 |
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| 摘 要： | 文章采用LA-ICP-MS测试技术对下庄矿田335矿床的沥青铀矿开展了U-Pb微区定年工作.335矿床沥青铀矿的成分特征及微观形貌特征显示,本区沥青铀矿在初始形成之后受到过后期的一些地质事件的影响.本次获得沥青铀矿的最大年龄为(93.5±1.2) Ma.结合华南岩石圈伸展发生的时间、辉绿岩脉对铀矿的控制作用及矿区内辉绿...
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| 关 键 词： | 地球化学 成矿时代 LA-ICP-MS 沥青铀矿 铀矿床 粤北 |
Timing of No. 335 ore deposit in Xiazhuang uranium orefield, northern Guangdong Province: Evidence from LA-ICP-MS U-Pb dating of pitchblende |
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| ZOU DongFeng,LI FangLin,ZHANG Shuang,HUANG Bin,ZONG KeQing.Timing of No. 335 ore deposit in Xiazhuang uranium orefield, northern Guangdong Province: Evidence from LA-ICP-MS U-Pb dating of pitchblende[J].Mineral Deposits,2011,30(5):912-922. |
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| Authors: | ZOU DongFeng LI FangLin ZHANG Shuang HUANG Bin ZONG KeQing |
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| Institution: | ZOU DongFeng1,LI FangLin2,ZHANG Shuang1,HUANG Bin1 and ZONG KeQing2(1 Postgraduate School,China University of Geosciences,Wuhan 430074,Hubei,China,2 Faculty of Earth Sciences,China) |
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| Abstract: | In this paper, an accurate U-Pb age of pitchblende was obtained from the No.335 uranium deposit in the Xiazhuang uranium orefield by using the LA-ICP-MS technique. The compositional and micro-morphologic characteristics of the pitchblende from the No. 335 ore deposit show that it has been altered by some subsequent geological events. (93.5±1.2) Ma is the oldest age in this study. A discussion has been made on the basis of integration of lithosphere extension timing of South China, the control of the diabase dike over the uranium mineralization and the emplacement time of diabase dikes in this ore deposit. It is revealed that the obtained age can reflect some rules of uranium ore formation in South China and might approximately represent the ore-forming age of the No. 335 ore deposit. |
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| Keywords: | geochemistry metallogenic epoch LA-ICP-MS pitchblende uranium deposit northern Guangdong |
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