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Evidence for methane in Martian meteorites
Nigel J F Blamey1,2, John Parnell2, Sean McMahon2
1Department of Earth Sciences, Brock University, 500 Glenridge Avenue, St Catharines, Ontario, Canada L2S 3A1.
Nature Communications
|June 17, 2015
Summary
Methane detected in Martian meteorites supports the theory that life on Mars, if it exists, may be found in subsurface habitats. This finding suggests methane could be an energy source for microbial life.
Area of Science:
- Planetary Science
- Astrobiology
- Geochemistry
Background:
- Methane in Mars' atmosphere is a key indicator for potential life, but atmospheric measurements have been inconclusive.
- Subsurface methane is a more likely scenario, analogous to Earth's geology.
- Serpentinization of rocks has been proposed as a methane source, but lacked direct evidence.
Purpose of the Study:
- To investigate the presence of methane in Martian meteorites.
- To test the hypothesis of serpentinization as a methane source on Mars.
- To evaluate the implications of methane in rock samples for subsurface life.
Main Methods:
- Analysis of Martian meteorites, specifically basic igneous rocks.
- Crushing rock samples to release volatile components.
- Characterization of the released volatile components for methane content.
Main Results:
- Methane-rich volatile components were liberated from crushed Martian meteorites.
- This provides direct evidence of methane within Martian rock samples.
- Supports geological processes as a source of methane on Mars.
Conclusions:
- The presence of methane in Martian rocks strengthens the hypothesis of subsurface habitats for life.
- Methane can serve as a potential energy and carbon source for microbial ecosystems.
- Further exploration should focus on subsurface environments for signs of Martian life.
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