摘要
概述了钙同位素分馏机理、分析测定以及在环境地球化学研究中的应用。自然界中钙同位素组成及其分馏过程与生成环境密切相关,可以很好地反映其地质成因及地质作用过程。近年来,随着钙同位素的测量技术的创新和改进,钙同位素地球化学的研究领域不断拓宽:它在研究环境生态系统中钙同位素变化规律、海洋钙循环、示踪古海洋和古气候等方面取得初步成效。先前的研究表明不同的样品中的44Ca /40Ca比值变化较小,δ44 Ca的变化在-2.88‰^+ 0.92 ‰之间。
Fractionation mechanism, analytical method and its applications in environmental geochemistry of calcium isotopes are summarized in this paper. In nature, the isotopic composition (δ^(44)Ca) of calcium and its fractionation processes depend on geochemical circumferences. Therefore, calcium isotopic composition can be used to constrain material sources and probe into geological processes. Recently, calcium isotopes are widely used in geochemical research, such as calcium transport in environmental ecosystems, calcium cycle in oceans, paleo-ocean and paleo-climate, due to recent advances in analytical technology of calcium isotopes. The results showed that δ^( 44)Ca varied from -2.88‰ to 0.92‰ in natural samples.
出处
《地球与环境》
CAS
CSCD
北大核心
2005年第1期71-78,共8页
Earth and Environment
基金
国家自然科学基金(40372108)
中国科学院重要方向项目(KZCX3 SW 140)
关键词
钙同位素
环境地球化学
分馏
calcium isotope
environmental geochemistry
fractionation
