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《中国地球化学学报(英文版)》 1993-01
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Trace Element Abundance Relationships in the Multi-stage Comagmatic Fractional Crystallization and Their Applications

WANG YUNLIANG LI JUCHU (Chengdu College of Geology,Chengdu,610059)  
In this study a mathematical expression of trace element abundance relationship for the mul- ti-stage comagmatic fractional crystallization has been established,based on geochemical studies of the Emeishan basalt-trachyte series and adjacent mafic-ultramafic layered intrusions,as well as on the avail- able data for basalt,andesite,dacite and rhyolite series in southern Andes,Chile,which have been well documented.It is demonstrated that the abundance constant (R) for a given trace element at dif- ferent stages of fractional crystallization of a parental magma is highly variable,which can be used as a criterion to divide fractional crystallization stages.
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