| 桂东北苗儿山张家花岗岩LA-ICP-MS锆石U-Pb年龄与地球化学特征 |
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| 引用本文： | 王正庆,范洪海,陈东欢,谢财富,肖为,罗桥花,郑可志,管太阳,林子瑜.桂东北苗儿山张家花岗岩LA-ICP-MS锆石U-Pb年龄与地球化学特征[J].地质通报,2018,37(5):895-907. |
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| 作者姓名： | 王正庆 范洪海 陈东欢 谢财富 肖为 罗桥花 郑可志 管太阳 林子瑜 |
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| 作者单位： | 核工业北京地质研究院;中核集团铀资源勘查与评价重点实验室;南华大学核资源工程学院;南京大学内生金属矿床成矿机制研究国家重点实验室;东华理工大学地球科学学院;广西壮族自治区三一〇核地质大队;中钢矿业开发有限公司 |
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| 基金项目： | 中核集团项目《南方重点花岗岩型铀矿基地资源预测和扩大》和中国地质调查局项目《整装勘查区找矿预测与技术应用示范》（编号：12120114052401） |
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| 摘 要： | 对张家岩体乍古田矿床及张家矿床的2件赋矿围岩样品,开展LA-ICP-MS锆石U-Pb同位素定年,获得乍古田矿床赋矿围岩形成年龄为218.0±1.4Ma,张家矿床赋矿围岩形成年龄为226.8±5.7Ma。另外,对张家岩体8件样品的主量、微量元素及Sr-Nd同位素分析测试显示,张家花岗岩富硅(Si O2=74.35%~76.29%)、高铝(Al2O3=12.54%~14.03%)、高碱(Na2O+K2O=6.95%~9.17%)、低镁(Mg O=0.34%~0.45%)、低钙(Ca O=0.68%~1.03%)、低钛(Ti O2=0.106%~0.18%),属高钾钙碱性花岗岩;富集Rb,亏损Ba、Sr,Rb/Sr值高,属于低Ba-Sr花岗岩;轻稀土元素富集,负Eu异常;富U(平均21.5×10-6),Th/U值低(平均1.63),有利于铀矿化;(87Sr/86Sr)i高(约0.7247),低εNd(t)值(平均-13.95),二阶段Nd模式年龄为2.07~2.19Ga。张家花岗岩属于强过铝质S型花岗岩,可能是华夏板块古元古代基底变泥质岩经部分熔融形成的。
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| 关 键 词： | 产铀岩体 LA-ICP-MS锆石U-Pb年龄 地球化学 张家花岗岩 |
| 收稿时间： | 2017/6/21 0:00:00 |
| 修稿时间： | 2017/8/14 0:00:00 |
Geochronology and geochemistry of the Zhangjia granitic pluton in the Miaoershan uranium orefield, Northeastern Guangxi Province |
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| WANG Zhengqing,FAN Honghai,CHEN Donghuan,XIE Caifu,XIAO Wei,LUO Qiaohu,ZHENG Kezhi,GUAN Taiyang and LIN Ziyu.Geochronology and geochemistry of the Zhangjia granitic pluton in the Miaoershan uranium orefield, Northeastern Guangxi Province[J].Geologcal Bulletin OF China,2018,37(5):895-907. |
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| Authors: | WANG Zhengqing FAN Honghai CHEN Donghuan XIE Caifu XIAO Wei LUO Qiaohu ZHENG Kezhi GUAN Taiyang and LIN Ziyu |
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| Institution: | Beijing Research Institute of Uraniuim Geology, Beijing 100029, China;Key Laboratory of Uranium Resourece Exploration and Evaluation Technology, CNNC, Beijing 100029, China;School of Nuclear Resources Engineering, University of South China, Hengyang 421001, Hu''nan, China,Beijing Research Institute of Uraniuim Geology, Beijing 100029, China;Key Laboratory of Uranium Resourece Exploration and Evaluation Technology, CNNC, Beijing 100029, China;State Key Laboratory for Mineral Deposits Research, Nanjing 210023, Jiangsu, China,Beijing Research Institute of Uraniuim Geology, Beijing 100029, China;Key Laboratory of Uranium Resourece Exploration and Evaluation Technology, CNNC, Beijing 100029, China,School of Earth Science, East China Institute of Technology, Nanchang 330000, Jiangxi, China,Beijing Research Institute of Uraniuim Geology, Beijing 100029, China,No. 310 Geology Party of Nuclear Industry, Guilin 541000, Guangxi, China,No. 310 Geology Party of Nuclear Industry, Guilin 541000, Guangxi, China,Sinosteel Mining Co. Ltd., Beijing 100080, China and School of Earth Science, East China Institute of Technology, Nanchang 330000, Jiangxi, China |
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| Abstract: | |
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| Keywords: | U-bearing granite LA-ICP-MS zircon U-Pb age geochemistry Zhangjia granitic pluton |
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