地质学报2025，Vol.99Issue(6)：1888-1904,17.DOI:10.19762/j.cnki.dizhixuebao.2025138
镓同位素在地球科学研究中的进展与挑战
Advances and challenges of gallium isotopes in earth sciences
摘要
Abstract
Driven by the rapid development of high-precision isotope mass spectrometry and chemical purification methods,significant breakthroughs have been made in the study of non-traditional metal isotopes in the field of Earth science.Among these,gallium(Ga)has garnered widespread attention in the geochemical community due to its unique geochemical properties.This paper reviews the research progress and challenges of Ga isotopes in Earth science,focusing on their geochemical properties,analytical methods,reservoirs and cycles,fractionation mechanisms,and geological applications.In nature,Ga occurs only as Ga3+,mainly found in bauxite,and has two stable isotopes:69Ga and 71 Ga.With the improvement of chemical separation and purification techniques,coupled with the development of multi-collector inductively coupled plasma mass spectrometers,Ga isotope analysis has achieved a precision of 0.04‰.Current studies have quantitatively analyzed Ga isotope distribution in reservoirs,including the mantle,crust,ocean,and meteorites,and have preliminarily established a geochemical cycle model for Ga isotopes.The fractionation of Ga isotopes is controlled by weathering and deposition processes.Studies show that during weathering,69Ga is preferentially retained in the soil relative to 71 Ga.Furthermore,changes in coordination during adsorption,desorption,and precipitation processes also lead to Ga isotope fractionation.Ga isotopes have also shown promise in applications such as tracing surface weathering,exploring Al-related geochemical processes,revealing mineral separation and compositional changes during magma origin and evolution,reflecting adsorption and precipitation processes,and characterizing marine and terrestrial environmental changes.In the future,further strengthening of research on Ga isotope fractionation mechanisms,exploration of the Ga isotope composition and its migration pathways and dynamics in various reservoirs,enhancement of high-precision Ga isotope testing systems,and expansion of the applications of Ga isotopes,including their combined use with other isotopes,are necessary.This review aims to enhance the comprehensive understanding of Ga isotopes in the field of Earth science and provide ideas for future research.关键词
镓同位素/Ga储库与循环/同位素分馏/Ga同位素测试/地质应用Key words
gallium isotope/gallium reservoir and cycle/isotopic fractionation/Ga isotope testing/geological applications引用本文复制引用
陈思钰,李茜,朱光有,贾凡琛,黄月,蓝婉嫣,朱延庆,高和婷,李生..镓同位素在地球科学研究中的进展与挑战[J].地质学报,2025,99(6):1888-1904,17.基金项目
本文为国家自然科学基金委重点基金项目(编号 42230812)资助的成果. （编号 42230812）
