Tracking carbon from subduction to outgassing along the Aleutian-Alaska Volcanic Arc.

Subduction transports volatiles between Earth's mantle, crust, and atmosphere, ultimately creating a habitable Earth. We use isotopes to track carbon from subduction to outgassing along the Aleutian-Alaska Arc. We find substantial along-strike variations in the isotopic composition of volcanic gases, explained by different recycling efficiencies of subducting carbon to the atmosphere via arc volcanism and modulated by subduction character.

Hydrogen Incorporation in Plagioclase.

We conducted experiments at high pressure () and temperature () to measure hydrogen solubility in plagioclase (Pl) with a range of compositions (An to An). Experiments were run at 700-850 °C, 0.5 GPa, and close to either the Ni-NiO (NNO) or iron-wüstite (IW) oxygen buffers.