常见稀土氧化物矿物中氧同位素分馏研究  

Study on Oxygen Isotope Fractionation in Common RE Oxide Minerals

作　　者：方涛[1] 裘愉卓[1] 

机构地区：[1]中国科学院地球化学研究所

出　　处：《中国稀土学报》1997年第2期178-181,共4页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金

摘　　要：通过加和增量模式，对主要稀土氧化物矿物的氧同位素分馏方程进行了计算，并对矿物中稀土成份的变化，Ｔｉ４＋、Ｎｂ５＋、Ｔａ５＋、Ｔｈ４＋等类质同象替换，非晶质化作用对矿物氧同位素分馏的影响进行了讨论。由于稀土氧化物矿物的氧同位素分馏曲线变化较大，不宜用作地质温度计。The oxygen isotope fractionation equations are calculated for major rare earth oxide minerals by using an increment model. The effects of the variation of RE composition, the isomorphic replacement of Ti 4+ , Nb 5+ , Ta 5+ , and Th 4+ , and the metamictizatin on the oxygen isotope fractionation in minerals, are also discussed. The rare earth oxides are not applicable for geothermometry due to their changeable oxygen isotope fractionation coefficients.

关 键 词：氧同位素 稀土氧化物 矿物 分馏系数 

分 类 号：P618.704[天文地球—矿床学]