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大陆板内构造环境的微量元素判别

, PP. 104-109

Keywords: 玄武岩,微量元素,大陆裂谷,大陆拉张,陆-陆碰撞带

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Abstract:

通过对国内外大陆板内构造环境玄武岩的研究,提出了大陆板内不同构造环境玄武岩的微量元素判别方法及判别标志,即大陆板内玄武岩的Th/Nb>0.11,Nb/Zr>0.04,其中,大陆裂谷区玄武岩的Th/Nb=0.11~0.27,大陆拉张带玄武岩的Th/Nb>0.27(一般0.27~0.67),陆-陆碰撞带玄武岩的Th/Nb>0.67。

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