Microbial alkalinity production and silicate alteration in methane charged marine sediments: implications for porewater chemistry and diagenetic carbonate formation.
January 2022
Meister, P., Herda, G., Petrishcheva, E., Gier, S., Dickens, G.R., Bauer, C. and Liu, B., 2022. Microbial alkalinity production and silicate alteration in methane charged marine sediments: implications for porewater chemistry and diagenetic carbonate formation. Frontiers in Earth Science 9, 756591, 1–18. https://doi.org/10.3389/feart.2021.756591.
Measured (solid symbols) and simulated porewater concentration profiles (lines) vs. depth at Ocean Drilling Program Site 1230, drilled in the Peru-Chile trench: (A) sulphate and methane; (B) ammonium; (C) inorganic carbon species; (D) pH (dashed line: after equilibration with headspace); (E) dissolved inorganic carbon and total alkalinity; (F) Ca and Mg; (G) K, Na, and Cl; and (H) total Si. All concentrations are reported in mmol/L. Dotted lines: simulation including microbial reactions; solid lines: simulation including microbial and mineral reactions. Measured data are from D’Hondt et al. (2003) and Donohue et al. (2006). For details see Meister et al. (2022).