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Title: Mars, methane and microbes : deep biospheres and other sources of methane on Earth and Mars
Author: McMahon, Sean
ISNI:       0000 0004 5348 730X
Awarding Body: University of Aberdeen
Current Institution: University of Aberdeen
Date of Award: 2014
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This thesis reports the application of geological techniques to astrobiological questions about hydrogen-consuming, methane-producing life in planetary crusts, particularly on Earth and Mars. I report original contributions to the following areas of knowledge: (1) the size of Earth's continental deep biosphere; (2) the effect of subsurface habitability on circumstellar habitable zones; (3) the habitability of martian vesicular basalt; (4) the role of methane clathrates in “Snowball Earth” deglaciation; (5) the retention of methane by rocks and minerals, with implications for deep habitats on Earth and Mars, and sampling techniques adaptable for Mars missions; (6) the volatile content of martian meteorites, with implications for life; and (7) sources of hydrogen for subsurface life or abiotic methanogenesis on Earth and Mars.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Methane