Generation of hydrogen in serpentinizing geological settings (H2 abundance)

Range ≥10 mmol/kg
Organism Biosphere
Reference Schönheit P, Buckel W, Martin WF. On the Origin of Heterotrophy. Trends Microbiol. 2016 Jan24(1):12-25. doi: 10.1016/j.tim.2015.10.003. p.12 bottom paragraphPubMed ID26578093
Primary Source [18] McDermott, J. et al. (2015) Pathways for abiotic organic synthesis at submarine hydrothermal fields. Proc. Natl. Acad. Sci. U.S.A. 112, 7668–7672 doi: 10.1073/pnas.1506295112.PubMed ID26056279
Comments p.12 bottom paragraph:"Modern anaerobic autotrophs thrive upon H2, which is continuously generated in serpentinizing geological settings at activities of the order of 10 mmol/kg or more [primary source] via disequilibria driven by rock–water interactions in hydrothermal systems [refs 19,20]. At such H2 activities, and under strictly anaerobic conditions, the synthesis of cell mass from CO2 is thermodynamically favorable [ref 21]."
Entered by Uri M
ID 112444