| 利源复式花岗岩锆石SHRIMP U-Pb定年研究 |
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| 引用本文： | 陈希清,付建明,程顺波,徐德明,马丽艳.利源复式花岗岩锆石SHRIMP U-Pb定年研究[J].大地构造与成矿学,2010,34(3). |
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| 作者姓名： | 陈希清 付建明 程顺波 徐德明 马丽艳 |
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| 作者单位： | 武汉地质矿产研究所,湖北,武汉,430223;武汉地质矿产研究所,湖北,武汉,430223;武汉地质矿产研究所,湖北,武汉,430223;武汉地质矿产研究所,湖北,武汉,430223;武汉地质矿产研究所,湖北,武汉,430223 |
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| 基金项目： | 中国地质调查局南岭地区锡矿选区评价与成果集成项目 |
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| 摘 要： | 利源复式花岗岩体位于粤赣二省交界部位,处在"粤北乐昌-连平钨锡铅锌成矿带"的南东段,主要由中粒斑状黑云母二长花岗岩(主体)和细粒黑云母钾(二)长花岗岩(补体)组成,为弱过铝质高钾钙碱性系列的岩石。应用高精度的锆石SHRIMPU-Pb法,获得前者的成岩年龄为(227.2±4.4)Ma(MSWD=3.4),属于印支期。结合岩石地球化学特征及区域成矿特征分析,认为补体花岗岩可能形成于燕山早期。
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| 关 键 词： | 锆石SHRIMP U-Pb定年 印支期 花岗岩 利源 粤北 |
SHRIMP U-Pb Zircon Dating of the Liyuan Granites |
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| CHEN Xiqing,FU Jianming,CHENG Shunbo,XU Deming,MA Liyan.SHRIMP U-Pb Zircon Dating of the Liyuan Granites[J].Geotectonica et Metallogenia,2010,34(3). |
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| Authors: | CHEN Xiqing FU Jianming CHENG Shunbo XU Deming MA Liyan |
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| Institution: | CHEN Xiqing,FU Jianming,CHENG Shunbo,XU Deming and MA Liyan(Wuhan Center,Chinese Geological Survey,Wuhan 430223,Hubei,China) |
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| Abstract: | The Liyuan granites situate in southeastern part of Lechang-Lianping W-Sn-Pb-Zn metallogenetic belt in northern Guangxi,on the border between Guangxi and Guangxi.The granites consist mainly of medium grained porphyritic biotite monzonitic granite,with minor fine grained biotite(monzonitic) granite.SHRIMP U-Pb zircon dating of the medium grained granite,yielded an age of(227.2±4.4)Ma(MSWD=3.4),indicating that the early stage granite was formed in late Indosinian.Considering the geochemical characteristics and regional granite intrusions and W-bearing veins,it can be deduced that the late stage fine grained granite was probably formed in early Yanshanian. |
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| Keywords: | SHRIMP U-Pb zircon dating Indosinian granite Liyuan northern Guangdong |
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