粤北笋洞花岗岩的形成时代、地球化学特征与成因

凌洪飞 沈渭洲 邓平 蒋少涌 高剑峰 叶海敏 濮巍 谭正中. 粤北笋洞花岗岩的形成时代、地球化学特征与成因[J]. 岩石学报, 2004, 20(3): 413-424.
引用本文: 凌洪飞 沈渭洲 邓平 蒋少涌 高剑峰 叶海敏 濮巍 谭正中. 粤北笋洞花岗岩的形成时代、地球化学特征与成因[J]. 岩石学报, 2004, 20(3): 413-424.
LING HongFei,SHEN WeiZhou,DENG Ping,JIANG ShaoYong,GA0 JianFeng,HaiMin,FU Wei,TAN ZhengZhong State Key Laboratory for Mineral Deposits Researcjh,Department of Earth Siences,Nanjing University,Nanjing 210093,China Research Institute No. 290,CNNC,Shaoguan 512026,China. Age, geochemistry and petrogenesis of the Sundong granite, northern Guangdong province[J]. Acta Petrologica Sinica, 2004, 20(3): 413-424.
Citation: LING HongFei,SHEN WeiZhou,DENG Ping,JIANG ShaoYong,GA0 JianFeng,HaiMin,FU Wei,TAN ZhengZhong State Key Laboratory for Mineral Deposits Researcjh,Department of Earth Siences,Nanjing University,Nanjing 210093,China Research Institute No. 290,CNNC,Shaoguan 512026,China. Age, geochemistry and petrogenesis of the Sundong granite, northern Guangdong province[J]. Acta Petrologica Sinica, 2004, 20(3): 413-424.

粤北笋洞花岗岩的形成时代、地球化学特征与成因

  • 基金项目:

    国家自然科学基金(40132010),创新群体项目(40221301),973项目(G1999043211)研究成果之一

  • 笋洞花岗岩体是粤北贵东复式花岗岩体的一个重要组成部分。锆石U-Pb年龄为189.1±0.7Ma,是燕山早期岩浆活动产物。该岩体的主要元素显示富硅、富碱、强过铝质和低 CaO/Na_2O比值等特征;微量元素方面,富集Rb,Th,U,Ce,Sm,Y,亏损 Ba,Sr,P,Ti;LREE轻微富集(LREE/HREE=6.6~8.8,(La/Yb)_N=6.44~10.74),Eu亏损明显(δEu=0.14~0.31);它具有低的ε_(Nd)(t)(-11.4~-9.3),高的δ~(18)O(10.2~12.7‰)、(~(87)Sr/~(86)Sr);(0.72949~0.74923)、~(206)Pb/~(204)Pb(18.180~18.488)、~(207)Pb/~(204)Pb(15.655~15.661)和古老的Nd模式年龄(1762~1933Ma)。上述这些特征表明,笋洞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,通过以泥质成分为主的古-中元古代变质沉积岩部分熔融的方式形成。
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出版历程
修回日期:  2003-06-12
刊出日期:  2004-05-31

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