电气石和水之间的氢同位素分馏  

HYDROGEN ISOTOPE FRACTIONATION BETWEEN TOURMALINE AND WATER

作　　者：钱雅倩[1] 郭吉保[1] 

机构地区：[1]南京地质矿产研究所

出　　处：《地球学报》1994年第Z1期189-196,共8页Acta Geoscientica Sinica

摘　　要：作者对电气石－水体系氢同位素平衡分馏和动力学分馏开展了实验研究，丰富了羟基矿物氢同位素分馏资料。本文对该研究的实验技术、分析方法作了介绍，并对实验结果进行讨论与国外已有的该方面的资料作了对比。在８００－６５０℃时电气石和水之间氢同位素平衡分馏系数与温度间线性关系为１０￣３ｌｎａ＿（电气石－水）＝－２８．２４（１０￣６／Ｔ￣２）＋２．６０；交换速率常数与温度间关系为ｌｎｋ＿２＝－０．１９－６．７０（１０￣３／Ｔ）。Hydrogen isotope equilibrium and kinetic fractionation between tourmaline and water has beenstudied experimentally at the temperarure of 350 -550℃.At the temperature of 800-650℃,the hydrogen isotope equilibrium fractionation factorbetween tourmaline and water can be described by a lineral equation:10￣3lna_{tourmaline-water}=-28.24（10￣6/T￣2）+2.60 At the temperature of 800-650℃,the relationship between rate constant of hydrogen isotopeexchange and temperature in the tourmaline-water system is:log k₂=-0.19-6.70（10～3/T）Activation energies（Q_a）for hydrogen isotope exchange in tourmaline is 128.3 kJ/mol。

关 键 词：电气石-水体系 氢同位素 

分 类 号：P5[天文地球—地质学]