海洋钡同位素地球化学研究进展

Research progresses on geochemistry of marine barium isotopes

随着多接收电感耦合等离子体质谱技术的快速发展,越来越多非传统稳定同位素在地学的众多研究领域展现出巨大的应用潜力。钡同位素在早期主要用于行星演化研究,而随着其分析精度的提升,被较广泛地用来示踪研究地球表生过程和环境演变。近些年,钡同位素在海洋学研究中发展迅速,尤其是在示踪(古)海洋生产力方面具有巨大潜力。本次研究综述了海洋钡的主要储库——海水、沉积物和珊瑚的钡同位素组成特征,及其示踪(古)海洋生产力的研究现状与进展,分析当前研究薄弱点,进而展望钡同位素地球化学在海洋科学研究的广阔应用前景。

With the development and application of multi-collector inductively coupled plasma mass spectrometry(MC-ICP-MS),huge potential and many applications for non-traditional stable isotopes have been developed in various fields of geoscience.Decades ago,barium(Ba)isotopes were first used to investigate the origin of the planets.With improvements in analytic precision,Ba isotopes have been widely used for tracing earth surface processes and environmental changes.In particular,recent studies focus on the cycle of Ba isotopes in seas and oceans and its applications for tracing(paleo-)productivity.In this paper,we reviewed the state-of-the-art research on Ba isotopes in seawater,marine sediments,and corals,as well as the potential for using Ba tracing as a new(paleo-)productivity proxy and the related challenges.Based upon the literature review,we propose some research directions for Ba isotopic applications in oceanography.