An experimental investigation of C–O–H fluid-driven carbonation of serpentinites under forearc conditions

Sieber, M.J.; Hermann, Jörg; Yaxley, G.M. (2018). An experimental investigation of C–O–H fluid-driven carbonation of serpentinites under forearc conditions. Earth and planetary science letters, 496, pp. 178-188. Elsevier 10.1016/j.epsl.2018.05.027

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The carbonation of serpentinites in the forearc region of the mantle wedge in subduction zones and of serpentinites within the subducting slab by fluids derived from prograde dehydration and decarbonation has important implications for the deep Earth carbon cycle. This study shows that the carbonation of serpentinites under the forearc can establish, over time, a significant reservoir for carbon within a partially hydrated mantle wedge and that carbonation of (ultra-) mafic rocks within the subducting slab contributes to C-transfer to greater depths and might supply carbon for arc volcanism or the deep mantle.

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