大别山燕山期亏损重稀土元素花岗岩类的成因及动力学意义

王强,许继锋,赵振华,王人镜,邱家骧,包志伟. 大别山燕山期亏损重稀土元素花岗岩类的成因及动力学意义[J]. 岩石学报, 2001, 17(4): 551-564.
引用本文: 王强,许继锋,赵振华,王人镜,邱家骧,包志伟. 大别山燕山期亏损重稀土元素花岗岩类的成因及动力学意义[J]. 岩石学报, 2001, 17(4): 551-564.
WANG Qiang,XU JiFeng,ZHAO ZhenHua,WANG RenJing,QIU JiaXiang and BAO Zhi Wei1. Guangzhou Institue of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China2. China University of Geosciences,Wuhan 430074,China. The petrogenesis and geodynamic significances of HREE depleted granitoids duringYanshan period in the Dabie Mountains[J]. Acta Petrologica Sinica, 2001, 17(4): 551-564.
Citation: WANG Qiang,XU JiFeng,ZHAO ZhenHua,WANG RenJing,QIU JiaXiang and BAO Zhi Wei1. Guangzhou Institue of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China2. China University of Geosciences,Wuhan 430074,China. The petrogenesis and geodynamic significances of HREE depleted granitoids duringYanshan period in the Dabie Mountains[J]. Acta Petrologica Sinica, 2001, 17(4): 551-564.

大别山燕山期亏损重稀土元素花岗岩类的成因及动力学意义

  • 基金项目:

    国家重点基础研究发展规划项目(G1999043202)、中国科学院知识创新项目(KZCX2-102)和攀登计划预选项目(95-Y-25)资助.

The petrogenesis and geodynamic significances of HREE depleted granitoids duringYanshan period in the Dabie Mountains

  • 本文通过岩石和元素地球化学研究对大别山(主要是张家咀地区)燕山期的花岗岩类进行了分类和成因研究,结果表明(1)大别山燕山期存在两类花岗岩,一类为重稀土元素(HREE)和Y强烈亏损(Sr/Y≥40.0,La/Yb≥40.0,Yb≤1.90μg/g,Y≤18.0μg/g,Sr≥400μg/g,Rb/Sr≤0.20,Rb/Ba≤0.08)的花岗岩,另一类为重稀土元素(HREE)和Y亏损不明显(Sr/Y<40.0,La/Yb<40.0,Rb/Sr>0.20,Rb/Ba>0.08)花岗岩(包括A型和一些I型花岗岩).重稀土元素(HREE)和Y强烈亏损的花岗岩存在两个亚类,一类富钠,与埃达克质岩石类似;另一类主要富钾,与富钾的高Ba-Sr的花岗岩类似.(2)大别山燕山期HREE和Y强烈亏损的花岗岩由增厚(>40km)的下地壳物质熔融形成,其热源可能是同期底侵的镁铁质-超镁铁质岩浆.这些花岗岩的形成可能诱导下地壳拆沉作用的发生.
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修回日期:  2001-06-12
刊出日期:  2001-11-30

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