Authors: Baptiste Debret, Bénédicte Ménez, Bastien Walter, Hélène Bouquerel, Pierre Bouilhol, Nadine Mattielli, Céline Pisapia, Thomas Rigaudier, Helen Myfanwy Williams
Published: 2022-09-16
Source: Full article
Recent thermodynamic and experimental studies have suggested that volatile organic compounds (e.g., methane, formate, and acetate) can be produced and stabilized in subduction zones, potentially playing an important role in the deep carbon cycle. However, field evidence for the high-pressure production and storage of solid organic compounds is missing. Here, we examine forearc serpentinite clasts recovered by drilling mud volcanoes above the Mariana subduction zone. Notable correlations between carbon and iron stable-isotope signatures and fluid-mobile element (B, As and Sb) concentrations provide evidence for the percolation of slab-derived CO