Partial Deoxygenation and Dehydration of Ferric Oxyhydroxide in Earth's Subducting Slabs

Abstract

Hydrous minerals or their water-bearing phases are widely recognized as potential water, oxygen, and hydrogen carriers in Earth's interior (Nishi, 2015;Ohtani, 2020;A. B. Thompson, 1992). They can dehydrate and/or deoxygenate under high pressure-temperature (P-T) conditions, thereby affecting the key physical and chemical properties of mantle minerals (e.g.,