山西大同钾镁煌斑岩地质地球化学特征  

GEOLOGY AND GEOCHEMISTRY OF LAMPROITE IN DATONG AREA,SHAXI PROVINCE

作　　者：张连昌[1,2] 卢登蓉[1,2] 王淑荣 梅厚钧 

机构地区：[1]西安工程学院 [2]中科院广州地球化学研究所

出　　处：《矿物岩石》1998年第4期31-37,共7页Mineralogy and Petrology

基　　金：国家科委攀登项目

摘　　要：根据饮牛沟钾镁煌斑岩的岩石学、岩石化学、矿物化学、微量及稀土元素地球化学特征，本文认为该岩体属钾镁煌斑岩，但在矿物成分及化学成分上与世界上典型的含金刚石的钾镁煌斑岩相比，相对贫钛和钾，未出现含Ｋ，Ｂａ，Ｔｉ，Ｚｒ的副矿物。该岩体的成因可能为母岩部分熔融后又经分离结晶作用而形成的，岩浆起源于贫钛的金云母二辉橄榄岩，形成深度１００ｋｍ左右。According to the petrological,petrochemical,mineralogical and geochemical characteristics of the lamproite from Yinniugou,it is discussed that the rock body is a type of lamproite,Ti,K,mass fractions of which are lower than typictal diamond bearing lamproite in the world,and has not associated minerals with K,Ba,Ti,Zr.The lamproite body was formed by partial fusion of mother rock and parting crystallization.The magma derived from Ti poor phlogopite iherzolite and the depth is approximately 100 km.

关 键 词：钾镁煌斑岩 矿物学 岩石学 地球化学 煌斑岩 

分 类 号：P588.13[天文地球—岩石学]