Scientists discover surface carbonates can transport heavy boron isotopes into deep mantle

Volatiles are crucial for sustaining life and Earth’s habitability, with subduction zones being the main pathways for these materials to enter the mantle. However, the devolatilization of subducting slabs may impede the recycling of volatiles like carbon. Boron, a moderately volatile element with strong fluid mobility, serves as a useful tracer for tracking the recycling of volatiles through its isotopic composition (δ¹¹B).

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