白云鄂博矿区交代及成矿作用的成因矿物学研究

通过对白云鄂博矿区碱性角闪石和金云母的成因矿物学研究，证实本区确实有岩浆碳酸岩的活动，活动中心在矿区东部，矿区碱交代作用来源于岩浆碳酸岩的后期热液活动，与白云鄂博铁－铌－稀土矿床中的主斯铁矿化无趋势关系，但与稀土矿化关系密切，作为铁矿化的太物学标志是：标型矿物镁钠闪石和镁钠铁闪石；金云母的特殊反多色性及其低Ｔｉ，高Ｘ＾ｔｅｔｓｉ的成分特征以及特殊的标型矿物组合。

GENETIC MINERALOGY OF METASOMATISM AND METALLOGENESIS IN BAIYUN''''EBO ORE AREA

on the basis of studies of genetic mineralogy of amphibole and phlogopite in Baiyun'ebo ore area, this paper indicates that the igncous carbonatite develops in this area, and the center of magmatism lies in its eastern part. The alkali metasomatism fluid comes from the late hydrothermal activity of magmatic carbonatite which hasn't direct relation with the main iron mineralization of Baiyun'ebo iron-niobiumrare-earth deposit, but is close to the rare-earth mineralization. The mineralogical criteria of iron minerlization are magnesioriebeckite and magnesioarfvedsonite, the reverse polychromation of pholgopite,its composition of fow Ti and highand its typomorphic minerals assemblage.