摘要
在已有云南禄丰鸡街碱性超基性岩杂岩体岩石学和地球化学资料基础上，通过对比，认为本区霞霓钠辉岩平均成分加入１０％ｗ（Ｆ０）＝８６％的橄榄石可作为杂岩体的原始岩浆，按Ｐ２Ｏ５的含量估算出这种岩浆为地幔岩经约３％部分熔融的产物；岩石学混合模拟计算表明本区地幔源岩具有明显亏损特征。亏损地幔可能与先期幔源岩浆活动有关。
Based on the data of petrology and geochemisty for Jijie alkaline-ultrabasic intrusive rock complex. The author of this paper, by means of correlation, suggested that the average composition of melteigites with 10% olivine added w (F o)=86% can be considered as the composition of the primary magma of the Jijie complex. This magma, whose composition is estimated from the incompatible element P 2O 5, was produced by 3%± partial melting of pyrolites. The results of Petrological Mixing Calculating showed that the mantle-source rocks of the Jijie complex are obviously depleted in incompatible elements.
基金
中国博士后基金
中国科学院矿床地球化学开放实验室基金
关键词
超基性岩
杂岩体
源区成分
岩石成份
Lufeng of Yunnan Province, Jijie alkaline-ultrabasic intrusive rock complex, compositions of mantle source
