Experimental evidence for hydrogen incorporation into Earth's core
Hydrogen is one of the possible alloying elements in the Earth's core, but its siderophile
(iron-loving) nature is debated. Here we experimentally examined the partitioning of
hydrogen between molten iron and silicate melt at 30–60 gigapascals and 3100–4600
kelvin. We find that hydrogen has a metal/silicate partition coefficient DH≥ 29 and is
therefore strongly siderophile at conditions of core formation. Unless water was delivered
only in the final stage of accretion, core formation scenarios suggest that 0.3–0.6 wt% H was …
(iron-loving) nature is debated. Here we experimentally examined the partitioning of
hydrogen between molten iron and silicate melt at 30–60 gigapascals and 3100–4600
kelvin. We find that hydrogen has a metal/silicate partition coefficient DH≥ 29 and is
therefore strongly siderophile at conditions of core formation. Unless water was delivered
only in the final stage of accretion, core formation scenarios suggest that 0.3–0.6 wt% H was …
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