摘要
<正>Ba是元素周期表中第六周期的碱土金属;由于Ba在地幔熔融过程中是高度不相容元素,因而在地壳中高度富集。相比同族元素Mg和Ca,Ba在上地壳和地幔中的含量比值更高(~93),因此Ba同位素可能是新的示踪地表物质俯冲再循环和壳幔相互作用的有效工具。俯冲带变质岩的Ba同位素组成可以为两个基础性的科学问题提供制约,即1)俯冲过程中Ba同位素是否发生分馏;2)俯冲陆
引文
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Huang,et al.,2015.Barium isotope compositions of igneous rocks.Goldschmidt Abstracts,2015,1331.