Biosignatures and abiotic constraints on early life (Reply)

Yuichiro Ueno (), Keita Yamada, Naohiro Yoshida, Shigenori Maruyama and Yukio Isozaki
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Yuichiro Ueno: Research Center for the Evolving Earth and Planet, Tokyo Institute of Technology
Keita Yamada: Tokyo Institute of Technology
Naohiro Yoshida: Research Center for the Evolving Earth and Planet, Tokyo Institute of Technology
Shigenori Maruyama: Research Center for the Evolving Earth and Planet, Tokyo Institute of Technology
Yukio Isozaki: University of Tokyo

Nature, 2006, vol. 444, issue 7121, E18-E19

Abstract: Abstract Replying to Sherwood Lollar and McCollom Sherwood Lollar and McCollom 1 suggest that abiotic reactions, in particular those catalysed by Fe–Ni alloys, might be responsible for the methane recorded in our fluid inclusions2. They point out that 13C in methane that is produced abiotically can be substantially depleted under field and laboratory conditions. However, native metal catalysis would not only have been implausible in the sulphidic environment of the basalt-hosted Dresser hydrothermal system, but it would also have been inconsistent with the isotopic fractionation between CH4 and CO2 that we note in the primary fluid2.

Date: 2006
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DOI: 10.1038/nature05500

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