东蒙地区燕山期三类成矿岩体地质地球化学特征

GEOLOGICAL AND GEOCHEMICAL CHARACTERISTICS OF THREE TYPES OF YANSHANIAN METALLOGENETIC PLUTONS IN EASTERN INNER MONGOLIA

根据东蒙地区广泛发育的中生代燕山期岩体的成矿特征 ,将其成矿岩体分成三种类型。它们分别是铜成矿岩体、铅锌成矿岩体和锡成矿岩体。通过对三种成矿岩体的岩石学、稀土元素和微量元素的分析研究 ,认为铜成矿岩体具有明显的幔源和壳源双重特征 ,为燕山早期岩浆演化的结果 ;锡成矿岩体为燕山晚期岩浆演化的产物 ,具有壳源特点 ;

The ore bearing plutons are divided into three types according to their metallogenic characferistics, i.e. Cu, Pb Zn and Sn plutons. Petrological, REE and micro element data of Cu plutons are typical of mantle & crust source and formation in Early Yanshanian period; Sn plutons typical of crust source and formation of Late Yanshanian period; and Pb Zn pluton typical of transiton from Cu pluton to Sn pluton.