摘要
介绍了单用稀土元素进行岩浆过程判别及源岩（浆）地球化学反演的新方法，根据岩石中稀土元素含量的对数或倒数值的线性相关关系，结合地质及岩石化学特征，可将岩浆过程简单地区分为批式熔融、分离熔融、平衡结晶及分离结晶四类。通过矿物、岩石与熔体间的分配关系可以建立多元方程组，并借助计算机求得近似统计解，从而得出源岩模拟矿物含量及稀土配分曲线。云南省喜山期富碱斑岩的源岩地球化学反演提供了一个应用实例。
In this paper,a new method is described for discrimination of magmatic processes andgeochemical inversion by REEs,merely.According to geological and petrochemical proper-ties and the linear correlations between logarithmic or reciprocal value of REE abundances,four magmatic processes which are batch melting, separated melting,equilibrium crystalliza-tion and fractional crystallization may be distinguished simply.On the basis of the distribu-tive relations between minerals and rocks vs. fused mass, equations are built,whose approx-imate statistic solutions are found with the help of electronic computer,thus the simulatedmineral contents and REE abundances of original rock are calculated.Geochemical inversionon Himalayan alkali-rich porphyries in Yunnan province is cited as an instance。
出处
《中南工业大学学报》
CSCD
1995年第3期290-294,共5页
Journal of Central South University of Technology(Natural Science)
基金
国家自然科学基金
关键词
岩浆岩
斑岩
地球化学反演
稀土族
magmatic rocks
rare earth elements
prophyry/geochemical inversion
