摘要
本文中作者采用红外光谱方法对雅鲁藏布江蛇绿岩带拉昂错超基性岩体二辉橄榄岩中的单斜辉石进行了测试研究。结果表明 ,雅鲁藏布江蛇绿岩带拉昂错岩体二辉橄榄岩中的单斜辉石为透辉石 ;该透辉石中含有一定量的结构水 ;并且 ,其高频带相关的结构OH含量是 1 4 6× 1 0 -6。透辉石成分的这种特殊性 (含有结构OH)恰恰是其特殊的高温高压的幔源生成环境的反映。
Using infrared spectroscopy, the author studied clinopyroxenes from lherzolites in the Laangcuo ultramafic body which occurred in the Yalung Zangbo Ophiolite Belt. The results show that the clinopyroxenes are diopsides containing a certain amount of structural OH. The OH concentration of diopside's high frequency OH band is 146×10 -6 . The compositional speciality (containing structural OH) of diopside simply reflects that it was formed in the mantle environment of high temperature and high pressure.
出处
《矿物学报》
CAS
CSCD
北大核心
2000年第1期40-43,共4页
Acta Mineralogica Sinica
关键词
蛇绿岩透辉石
红外光谱
二辉橄榄岩
水
ophiolite
diopside
infrared spectroscopy
structural OH
concentration
