粤西连阳复式岩体的地球化学特征及其成因研究

高剑峰 凌洪飞 沈渭洲 陆建军 张敏 黄国龙 谭正中. 粤西连阳复式岩体的地球化学特征及其成因研究[J]. 岩石学报, 2005, 21(6): 1645-1656.
引用本文: 高剑峰 凌洪飞 沈渭洲 陆建军 张敏 黄国龙 谭正中. 粤西连阳复式岩体的地球化学特征及其成因研究[J]. 岩石学报, 2005, 21(6): 1645-1656.
GAO JianFeng LING HongFei SHEN WenZhong LU JianJun ZHANG Min HUANG GuoLong TAN ZhengZhong 1.State Key Laboratory for Mineral Deposits Research,Department of Earth Sciences,Nanjing University,Nanjing 210093,China2.Research Institute No.290,CNNC,Shaoguan 512026,China. Geochemistry and petrogenesis of Lianyang granite composite, west Guangdong province[J]. Acta Petrologica Sinica, 2005, 21(6): 1645-1656.
Citation: GAO JianFeng LING HongFei SHEN WenZhong LU JianJun ZHANG Min HUANG GuoLong TAN ZhengZhong 1.State Key Laboratory for Mineral Deposits Research,Department of Earth Sciences,Nanjing University,Nanjing 210093,China2.Research Institute No.290,CNNC,Shaoguan 512026,China. Geochemistry and petrogenesis of Lianyang granite composite, west Guangdong province[J]. Acta Petrologica Sinica, 2005, 21(6): 1645-1656.

粤西连阳复式岩体的地球化学特征及其成因研究

  • 基金项目:

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

  • 粤西连阳复式岩体由燕山早期连阳花岗岩岩体(锆石 U-Pb 年龄为144.3±0.8Ma)和燕山晚期白浆花岗岩岩体(锆石 U-Pb 年龄为106.4±0.7Ma)组成。这两个岩体在岩石化学上均富硅,属准铝质,并相对富钾。在微量元素组成上,连阳岩体和白浆岩体都强烈亏损 Ba、Sr 和 Ti,轻微亏损 Nb 和 Ta。两岩体的稀土元素特征类似,总量比较高,分别为187.6~300.6×10~(-6)和185.5~294.3×10~(-6),轻稀土富集,LREE/HREE 分别为4.17~9.28和4.13~7.08,(La/Yb)_N 分别为3.66~9.03和3.29~5.16,Eu 明显亏损,δEu 值分别为0.04~0.53和0.04~0.16。连阳岩体的ε_(Nd)(t)为-9.1~-7.6,白浆岩体的ε_(Nd)(t)为-9.8~-7.8,两者具有相似的 Nd 同位素组成。钕模式年龄分别为1.56~1.68Ga 和1.54~1.71Ga。研究表明,连阳复式岩体燕山期花岗岩形成于地壳剪切-拉张的构造背景下,是中元古地壳部分熔融的产物。
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收稿日期:  2005-02-26
刊出日期:  2005-11-30

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