摘要
在内蒙古白云鄂博铌-稀土-铁矿床的顶板围岩——钾交代岩中发现大量含钡的钾微斜长石,其钡长石(Cn)分子含量变化于5.5～13.8mol%Cn之间,构成钾钡长石系列矿物.Cn含量高者则形成钡冰长石并与含Cn较低的钾微斜长石构成环带构造.本文根据钾钡长石系列矿物的显微构造、化学成分及其矿物组合特点确定了在本区普遍发育的另一种热液变代作用——钡交代作用.
Hyalophane Series, (K, Ba) Al (Al, Si) Si_2O_8, which varies in Celsian (Cn), from 5.5 to 13.8mol percent has been found abundantly in the caprock of the niobium-rare earth-iron deposits at Bayan OBO, Inner Mongolia, China. Micro-structure shows rings and bands of Cn suggesting Ba replacement as a important ore-forming process in the deposit.
出处
《地质找矿论丛》
CAS
CSCD
1993年第3期89-94,共6页
Contributions to Geology and Mineral Resources Research
