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Rock-crushing derived hydrogen directly supports a methanogenic community: significance for the deep biosphere
Provedor de dados: 5
Autores: Parkes, Ronald John; Berlendis, Sabrina; Roussel, Erwan; Bahruji, Hasiliza; Webster, Gordon; Oldroyd, Anthony; Weightman, Andrew J.; Bowker, Michael; Davies, Philipp R; Sass, Henrik.
Microbial populations exist to great depths on Earth, but with apparently insufficient energy supply. Earthquake rock fracturing produces H2 from mechanochemical water splitting, however, microbial utilization of this widespread potential energy source has not been directly demonstrated. Here, we show experimentally that mechanochemically generated H2 from granite can be directly, long‐term, utilized by a CH4 producing microbial community. This is consistent with CH4 formation in subsurface rock fracturing in the environment. Our results not only support water splitting H2 generation as a potential deep biosphere energy source, but as an oxidant must also be produced, they suggest that there is also a respiratory oxidant supply in the subsurface which is...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00483/59444/62283.pdf