橄榄石流体包裹体中分子水的发现  

Discovery of molecular water in fluid inclusions of olivine.

作　　者：邵济安[1] 臧启家 韩庆军[2] 张树霖[1] 李红东[1] 王志海[3] 

机构地区：[1]北京大学,北京100871 [2]中国科学院地质与地球物理研究所,北京100029 [3]西安地质矿产研究所,西安710054

出　　处：《岩石学报》2000年第1期127-133,共7页Acta Petrologica Sinica

基　　金：国家自然科学基金! ( 496 72 15 6和 49872 0 79)

摘　　要：利用激光拉曼和红外光谱测定了内蒙古东部喀喇沁地区玻基橄辉岩橄榄石斑晶中的原生流体包裹体的成分 ,发现了波长分别为 32 45～ 35 6 5 cm- 1的液态水和波长为 36 2 7的 cm- 1气态水的特征峰 ,而未发现结构水的特征峰。橄榄石的惰性气体同位素测定结果表明包裹体中的水来源于地幔岩浆 ,而非混染陆壳水。这一发现 。Fourier transform infrared spectrophotometer, laser Raman spectrophotometer and laser Raman Microprobe have been used to detect composition of fluid inclusions in olivine phenocrysts in limburgite from Harkin area in eastern Inner Mongolia, China. The IR and laser Raman spectra show strong absorption bands of molecular water at 3245~3565cm -1 , and band of water vapor at 3627cm -1 . The spectrum of hydroxyl (OH) was not observed. Analysis of inert gases isotope compositions suggests that the water in the fluid inclusions is derived from mantle magma source instead of contaminated crust. The discovery reveals a new site for the mantle derived water.

关 键 词：内蒙古 橄榄石 流体包裹体 分子水 

分 类 号：P578.942[天文地球—矿物学]