Geobiotropy on Early Earth and in the Rocky Universe

Marie Paule & Renelde Bassez
It is currently proposed that life existed 3.5-3.8 Ga ago. However, the origin of the microorganisms is not yet explained. This presentation shows an anoxic path of formation of ferric minerals together with production of H2, when ferrous rocks interact with water at 300°-350°C, 10-25 MPa, 700-600 kg/m3, and at very alkaline pH, 11-14. The released H2 can interact with the dissolved CO2 and lead to CO that is known to be the preferred simple...
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