Radiolytic H₂ Production in Martian Environments.

ABSTRACT: Hydrogen, produced by water radiolysis, has been suggested to support microbial communities on Mars. We quantitatively assess the potential magnitude of radiolytic H₂ production in wet martian environments (the ancient surface and the present subsurface) based on the radionuclide compositions of (1) eight proposed Mars 2020 landing sites, and (2) three sites that individually yield the highest or lowest calculated radiolytic H₂ production rates on Mars. For the proposed landing sites, calculated H₂ production rates vary by a factor of ∼1.6, while the three comparison sites differ by a factor of ∼6. Rates in wet martian sediment and microfractured rock are comparable with rates in terrestrial environments that harbor low concentrations of microbial life (e.g

SUBMITTER: Dzaugis M 

PROVIDER: S-EPMC6150936 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature