赣中盛源盆地及邻区橄榄玄粗岩系列火山岩中黑云母化学成分特征  

Chemical composition of biotite of shoshonite volcanic rock series from Shengyuan basin and its adjacent area

作　　者：谭桂丽[1,2] 吴俊奇[2] 凌洪飞[3] 陈培荣[3] 

机构地区：[1]南京地质矿产研究所,江苏南京210016 [2]南京大学地球科学系,江苏南京210093 [3]南京大学成矿作用国家重点实验室,江苏南京210093

出　　处：《资源调查与环境》2010年第1期19-24,共6页Resources Survey & Environment

基　　金：中国核工业地质局科研项目(2006YG026)资助

摘　　要：本文利用电子探针技术对赣中盛源盆地及邻区橄榄玄粗岩系列火山岩中黑云母的类型、化学成分及结晶时的温度和氧逸度条件等进行了研究。黑云母为镁质黑云母;结晶时温度的大致范围为1 060°C^1 100°C,氧逸度大致范围为1-0 7bar^1-0 9bar。本文研究表明,黑云母的化学成分研究是揭示岩石成因类型的一种有效途径,可为研究岩体成因类型以及成岩时的物理化学条件提供依据,并对成岩具有重要的指示意义。This paper presents a systematic study on the type, chemical composition, temperature condition and oxygen fugacity during crystallization of biotite of shoshonite volcanic rock series from Shengyuan basin and its adjacent area by using of electron probe microanalysis technique. The biotite is of Mg-biotite type, the crystallization temperature is about 1 060℃-1 100℃ and the oxygen fugaeity is about 10^-7 bar-10^-9 bar. The present study indicates that the study on the chemical composition characteristics of biotite is an effective way to reveal the genesis types of rocks and can provide information to discuss the genesis and physieo-chemical condition of magmas, which have important indicator significance in the diagenesis.

关 键 词：橄榄玄粗岩系列火山岩 黑云母 化学成分 成岩意义 

分 类 号：P578.959[天文地球—矿物学]