粤北帽峰花岗岩体地球化学特征及成因研究

凌洪飞 沈渭洲 邓平 蒋少涌 姜耀辉 邱检生 黄国龙 叶海敏 谭正中. 粤北帽峰花岗岩体地球化学特征及成因研究[J]. 岩石学报, 2005, 21(3): 677-687.
引用本文: 凌洪飞 沈渭洲 邓平 蒋少涌 姜耀辉 邱检生 黄国龙 叶海敏 谭正中. 粤北帽峰花岗岩体地球化学特征及成因研究[J]. 岩石学报, 2005, 21(3): 677-687.
LING HongFei,SHEN WeiZhou,DENG Ping,JIANG ShaoYong,JIANG YaoHui,QIU JianSheng,HUANG GuoLong,YE HaiMing and TAN ZhengZhong State Key Laboratory for Mineral Deposits Research,Department of Earth Sciences,Nanjing University,210093 Nanjing,China Research Institute No. 290,CNNC,Shaoguan 512026,China. Study of geochemistry and petrogenesis of the Maofeng granite, northern Guangdong province[J]. Acta Petrologica Sinica, 2005, 21(3): 677-687.
Citation: LING HongFei,SHEN WeiZhou,DENG Ping,JIANG ShaoYong,JIANG YaoHui,QIU JianSheng,HUANG GuoLong,YE HaiMing and TAN ZhengZhong State Key Laboratory for Mineral Deposits Research,Department of Earth Sciences,Nanjing University,210093 Nanjing,China Research Institute No. 290,CNNC,Shaoguan 512026,China. Study of geochemistry and petrogenesis of the Maofeng granite, northern Guangdong province[J]. Acta Petrologica Sinica, 2005, 21(3): 677-687.

粤北帽峰花岗岩体地球化学特征及成因研究

  • 基金项目:

    国家自然科学基金创新群体项目(批准号:40221301)和重点项目(批准号:40132010)研究成果之一.

  • 帽峰花岗岩体是粤北贵东复式花岗岩体中一个重要的产铀岩体。单颗粒锆石U-Pb定年结果为219.6±0.9Ma, 属于印支期岩浆活动产物。该岩体的主要元素显示富硅、富碱、强过铝质和低CaO/Na2O比值等特征。微量元素富集Rb,Th, U,Ce,Sm和Y而亏损Ba,Sr,P和Ti;LREE轻微富集(LREE/HREE=1.70-9.63,(La/Yb)N=0.41-6.25),Eu亏损明显(δEu=0.02-0.22);具有低的εNd(t)值(-12.3--10.8),变化的δ18O(4.1-11.3‰)、(87Sr/86Sr)i(0.71049- 0.73359)、206Pb/204Pb(18.345-22.019)和207Pb/204Pb(15.646-15.863)以及古老的Nd模式年龄(1879-1996Ma)。以上特征表明,帽峰岩体属于典型的壳源型花岗岩,是在地壳伸展-减薄的构造背景下,通过古元古代成分不均一的泥质变质岩低程度部分熔融的方式形成。
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收稿日期:  2005-01-11
修回日期:  2005-01-11
刊出日期:  2005-05-31

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