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1584.pdf

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Researchers from Imperial College London and the Natural History Museum studied micrometeorites and their potential for microbial D/H fractionation, which could explain high D/H ratios in extraterrestrial materials. They found that COPS phases in micrometeorites, previously thought to be of extraterrestrial origin due to their high D/H ratios, may have formed after atmospheric entry as terrestrial alteration products. The high D/H ratios of COPS could be the result of microbial fractionation of D during hydration of FeNi metal in the terrestrial environment, rather than an extraterrestrial origin. This has implications for the interpretation of D/H ratios in other planetary materials, including martian meteorites. Microbial processes such as methanogenesis and methane oxidation can cause fractionation of hydrogen isotopes, leading to enrichment of deuterium in residual substrates.

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Researchers from Imperial College London and the Natural History Museum studied micrometeorites and their potential for microbial D/H fractionation, which...

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File Format: PDF
File Size: 85 KB
Pages: 2
Language: EN
Total Downloads: 81
Last Updated: 1 month ago

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