Marine carbonate, an important CO2 reservoir, is continuously sent to the Earth's deep interior at subduction zones, forming an essential part of the global carbon cycle. The pros and cons of using calcium isotope compositions to trace marine carbonates recycled into the mantle are discussed in this Perspective.

中文翻译：

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钙同位素组合物作为追踪碳酸盐循环利用的手段

海洋碳酸盐是重要的二氧化碳储层，在俯冲带不断输送到地球深处，形成全球碳循环的重要组成部分。本文讨论了使用钙同位素组合物追踪循环到地幔中的海洋碳酸盐的利弊。