稳定钕同位素地球化学综述

A review of stable neodymium isotope geochemistry

钕(Nd)元素是一种轻稀土元素,共有7个稳定同位素。近年来,随着质谱分析技术和化学分离方法的发展,稳定Nd同位素地球化学已经成为地球化学的重要研究方向之一。本文对稳定Nd同位素体系的研究现状进行了系统总结,包括Nd元素的地球化学性质;Nd同位素的化学分离、质谱测定及质量分馏校正等分析技术方法;球粒陨石、全硅酸盐地球和其他储库的稳定Nd同位素组成;稳定Nd同位素在地质过程中的应用,例如在岩浆演化过程、低温地质过程以及宇宙化学中的应用。目前稳定Nd同位素地球化学还集中在分析方法和自然储库的研究方面,未来在地球科学和行星科学中具有广阔的应用前景。

Neodymium(Nd)is a light rare earth element with 7 stable isotopes.In recent years,with the development of mass spectrometry analytical techniques and chemical separation methods,stable Nd isotope geochemistry has become one important studying fields of geochemistry.This paper provides a systematic summary of current studies of stable Nd isotope geochemistry,including:the geochemical properties of Nd;analytical techniques including the chemical separation,mass spectrometry,and massdependent fractionation calibration for Nd isotopes;stable Nd isotope compositions of chondrite,silicate earth,and other reservoirs;the application of stable Nd isotopes for studying geological processes,including the magmatic evolution and low-temperature geological processes,and cosmochemistry.At present,the stable Nd isotope geochemistry mainly focuses on studying its analytical methods and characteristics of natural reservoirs.In the future,the stable Nd isotope geochemistry will be widely applied in the earth and planetary sciences.