| REE Abundaces in Megacrysts and Host Basalts：REE Behavior of Magma at High Pressures |
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| 引用本文： | 肖森宏.REE Abundaces in Megacrysts and Host Basalts：REE Behavior of Magma at High Pressures[J].中国地球化学学报,1991,10(1):11-20. |
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| 作者姓名： | 肖森宏 |
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| 作者单位： | InstituteofGeochemistry,AcademiaSinica |
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| 摘 要： | Based on REE abundances in megacrysts and host basalts and their equilibrium conditions,it has proved that megacrysts may have been produced from the magma derived from the host rocks or of more basic composition.The REE ratios of megacrysts to host rocks may be taken as partition coefficients when both are equilibrium with each other.The crystal fractionation of megacrysts has caused the evolution of REE in the magma.It is obvious that some host basalts are the product of magma evolution after crystal fractionation.According to REE abundances in the host rocks and the partition coefficients between crystal and liquid,the history of crystal fractionation of magma can be traced.
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| 关 键 词： | 稀土元素富集 岩浆 高压条件 玄武岩 巨晶 |
REE Abundances in megacrysts and host basalts: REE behavior of magma at high pressures |
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| Xiao Senhong.REE Abundances in megacrysts and host basalts: REE behavior of magma at high pressures[J].Chinese Journal of Geochemistry,1991,10(1):11-20. |
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| Authors: | Xiao Senhong |
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| Institution: | (1) Institute of Geochemistry, Acadenia Sinica, China |
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| Abstract: | Based on REE abundances in megacrysts and host basalts and their equilibrium conditions, it has proved that megacrysts may
have been produced from the magma derived from the host rocks or of more basic composition. The REE ratios of megacrysts to
host rocks may be taken as partition coefficients when both are in equilibrium with each other. The crystal fractionation
of megacrysts has caused the evolution of REE in the magma. It is obvious that some host basalts are the product of magma
evolution after crystal fractionation. According to REE abundances in the host rocks and the partition coefficients between
crystal and liquid, the history of crystal fractionation of magma can be traced. |
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