赣中变质岩带黑云母的化学组分特征  

CHEMICAL COMPONENT CHARACTERISTICS OF BIOTITE FROM CENTRAL JIANGXI METAMORPHIC BELT

作　　者：胡恭任[1] 于瑞莲[1] 

机构地区：[1]华侨大学,福建泉州362011

出　　处：《江西地质》2001年第1期9-12,共4页Jiangxi Geology

基　　金：福建省自然科学基金!(D9910016);南京大学内生金属矿床成矿机制研究国家重点实验室开放基金;华侨大学科研起动基金联合资助.

摘　　要：赣中变质岩带在空间上具有递增变质分布特征，由低到高依次为绢云母－绿泥石带、黑云母带、铁铝榴石带、十字石带、矽线石带，部分地段还出现混合岩化带。本文对各变质带的黑云母进行了系统的成分研究，研究表明：从黑云母带→石榴石带→十字石带→矽线石带→混合岩带，黑云母中的Na2O、K2O含量有增高的趋势，La、Yb、Y、Th等微量元素含量降低；黑云母中某些微量元素与其主岩中该微量元素的含量有一定的关系，Ba、Ce、Pb、Cr、Ti的含量随着它们在岩石中总含量的增加而增加。：The metamorphic degree is increasing gradually from one place to another within the Central Jiangxi metamorphic belt, where the sericite－chlorite zone, the biotite zone, the almandine zone, the staurolite zone, the sillimanite zone and locally the migmatite zone appear in succession from low to high degree of metamorphism． Chemical analysis has been performed on biotite from the various metamorphic zones． The result shows that Na2O and K2O are increasing while La, Yb, Y and Th are decreasing from the biotite zone through the garnet zone, the staurolite zone and the sillimanite zone to the migmatite zone． The contents of some trace elements such as Ba, Ce, Pb, Cr and Ti in biotite are positively correlated with those in the host rock．

关 键 词：黑云母 化学组分 变质岩带 微量元素 石榴石 矽线石 混合岩带 

分 类 号：P588.3[天文地球—岩石学] P578.959[天文地球—地质学]