| 豫西崤山东部中河岩体锆石U-Pb年龄、地球化学和Lu-Hf同位素特征 |
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| 引用本文： | 肖建辉,武广,孟宪锋,范海洋,李铁刚,田强国,徐文超.豫西崤山东部中河岩体锆石U-Pb年龄、地球化学和Lu-Hf同位素特征[J].矿床地质,2018,37(2):290-310. |
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| 作者姓名： | 肖建辉 武广 孟宪锋 范海洋 李铁刚 田强国 徐文超 |
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| 作者单位： | 河南省地质矿产勘查开发局第一地质矿产调查院;河南省金银多金属成矿系列与深部预测重点实验室;中国地质科学院矿产资源研究所国土资源部成矿作用与资源评价重点实验室 |
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| 基金项目： | 中国地质调查局地质调查项目（编号：12120114035201）和中国矿产地质与成矿规律综合集成和服务（矿产地质志）项目（编号：DD20160346）的联合资助 |
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| 摘 要： | 中河花岗斑岩体位于河南省崤山东部,该岩体是最近发现的中河大型银铅锌矿床的成矿母岩。选取2件花岗斑岩样品进行LA-ICP-MS锆石U-Pb定年,获得2件样品的~(206)Pb/~(238)U年龄加权平均值分别为(129±0.7)Ma(MSWD=0.78)和(131±1.5)Ma(MSWD=1.70),表明中河岩体形成于早白垩世。岩石地球化学特征显示,中河岩体具有高的w(SiO_2)和w(K_2O)、低的w(Na_2O),其A/CNK比值为1.03~1.63,Mg#值介于25~50,总体上属于过铝质-强过铝质的高钾钙碱性系列。岩石具有低的w(Yb),中等-弱的铕负异常,稀土元素配分曲线为轻稀土元素富集型,轻稀土元素分馏相对强烈,但重稀土元素分馏不明显。中河岩体有相对低的w(Sr)和w(Y),且富集大离子亲石元素Rb、Ba、U、K和轻稀土元素,亏损高场强元素Nb、Ta、P、Zr、Hf、Ti和重稀土元素。中河岩体锆石εHf(t)值为-34.4~-23.2,平均为-26.9,Hf同位素二阶段模式年龄介于2485~3182 Ma,平均为2714 Ma。岩石地球化学特征及Hf同位素组成表明中河岩体的岩浆源区主要为新太古代地壳物质,并有少量的中太古代地壳物质,中-新太古代增生的具有弧岩浆特征的地壳物质部分熔融形成了早白垩世的中河岩体。
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| 关 键 词： | 地球化学 锆石U-Pb年龄 Lu-Hf同位素 中河岩体 崤山 豫西 |
| 收稿时间： | 2017/9/7 0:00:00 |
| 修稿时间： | 2018/2/20 0:00:00 |
Zircon U-Pb age, geochemistry and Lu-Hf isotopic characteristics of Zhonghe intrusion in eastern Xiaoshan, Henan Province |
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| XIAO JianHui,WU Guang,MENG XianFeng,FAN HaiYang,LI TieGang,TIAN QiangGuo and XU WenChao.Zircon U-Pb age, geochemistry and Lu-Hf isotopic characteristics of Zhonghe intrusion in eastern Xiaoshan, Henan Province[J].Mineral Deposits,2018,37(2):290-310. |
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| Authors: | XIAO JianHui WU Guang MENG XianFeng FAN HaiYang LI TieGang TIAN QiangGuo and XU WenChao |
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| Institution: | No.1 Institute of Geological and Mineral Resources Survey, Henan Bureau of Geoexploration and Mineral Development, Luoyang 471000, Henan, China;Key Laboratory of Au-Ag-Polymetallic Deposit Series and Deep-seated Metallogenic Prognosis of Henan Province, Luoyang 471000, Henan, China,MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China,No.1 Institute of Geological and Mineral Resources Survey, Henan Bureau of Geoexploration and Mineral Development, Luoyang 471000, Henan, China;Key Laboratory of Au-Ag-Polymetallic Deposit Series and Deep-seated Metallogenic Prognosis of Henan Province, Luoyang 471000, Henan, China,MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China,MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China,No.1 Institute of Geological and Mineral Resources Survey, Henan Bureau of Geoexploration and Mineral Development, Luoyang 471000, Henan, China;Key Laboratory of Au-Ag-Polymetallic Deposit Series and Deep-seated Metallogenic Prognosis of Henan Province, Luoyang 471000, Henan, China and No.1 Institute of Geological and Mineral Resources Survey, Henan Bureau of Geoexploration and Mineral Development, Luoyang 471000, Henan, China;Key Laboratory of Au-Ag-Polymetallic Deposit Series and Deep-seated Metallogenic Prognosis of Henan Province, Luoyang 471000, Henan, China |
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| Abstract: | |
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| Keywords: | geochemistry zircon U-Pb age Lu-Hf isotopes Zhonghe intrusion Xiaoshan western Henan Province |
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