内蒙古中部区地台区和地槽区元素地球化学分布特征

Geochamical Distribution Feature of Element of Platform and Geosymclinal Area in Middle Part Inner Mongolia

本文利用历史地球化学的观点，研究了内蒙中部区地台和地槽区各时代常量元素（Ｓｉ、Ｋ、Ｎａ、Ａｌ、Ｆｅ、Ｃａ、Ｍｇ）、微量元素（Ｃｕ、Ｐｂ、Ｚｎ、Ａｕ、Ａｇ、Ａｓ、Ｓｂ、Ｈｇ等）的分布特征，以及稀土元素（Ｌａ、Ｃｅ、Ｎｄ、Ｓｍ、Ｇｄ、Ｅｕ、Ｔｂ、Ｙｂ、Ｌｕ）总量变化、元素的配分和稀土元素的组成模式，总结了元素随地质年代由老到新的演化规律，指出了主要成矿元素相对富集的层位，得出内蒙中部区相对富集轻稀土、贫中稀土和重稀土的结论。

With the viewpoint of history geochamistry the paper studied distruibution feature macro-element(Si,K,Na,Al,Fe,Ca,Mg)and micro-element(Cu,Pb,Zn,Au, Ag,As,Sb,Hg,Bi,ect)in platform and geosynclinal area of middle part Inner Mongolia in each geologic era,and total charges, element′s partitiong and the composititon modlel of Ree REE(La,Ce,Nd,Sm,Gd,Eu,Tb,Yb,Lu).I tsums up element evolotion regular with geological age going on and indicates relative abondant horizon of main ore-forming ele- ment.Inner Mongolia midde part is relatively abundant in LREE and deficient HREE.