Depleted carbon isotope compositions observed at Gale crater, Mars-Reference-Cited by-同舟云学术

Depleted carbon isotope compositions observed at Gale crater, Mars

Published:2022-01-18 Issue:4 Volume:119 Page:
ISSN:0027-8424
Container-title:Proceedings of the National Academy of Sciences
language:en
Short-container-title:Proc. Natl. Acad. Sci. U.S.A.

Author:

House Christopher H.¹²^ORCID,Wong Gregory M.¹^ORCID,Webster Christopher R.³,Flesch Gregory J.³,Franz Heather B.⁴^ORCID,Stern Jennifer C.⁴,Pavlov Alex⁴^ORCID,Atreya Sushil K.⁵,Eigenbrode Jennifer L.⁴^ORCID,Gilbert Alexis⁶,Hofmann Amy E.³^ORCID,Millan Maëva⁴⁷,Steele Andrew⁸,Glavin Daniel P.⁴^ORCID,Malespin Charles A.⁴,Mahaffy Paul R.⁴^ORCID

Affiliation:

1. Department of Geosciences, The Pennsylvania State University, University Park, PA 16802

2. Earth and Environmental Systems Institute, The Pennsylvania State University, University Park, PA 16802

3. NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109

4. Solar System Exploration Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771

5. Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI 48109

6. Department of Earth and Planetary Sciences and Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo 152-8550, Japan

7. Department of Biology, Georgetown University, Washington, DC 20057

8. Earth and Planets Laboratory, Carnegie Institution for Science, Washington, DC 20015

Abstract

Significance Carbon isotopic analysis is among the most pervasive geochemical approaches because the fractionation of carbon isotopes produces a natural tracer of biological and chemical processes. Rover-based carbon isotopic analyses of sedimentary rocks on Mars have the potential to reveal modes of Martian carbon cycling. We report carbon isotopic values of the methane released during pyrolysis of samples obtained at Gale crater. The values show remarkable variation indicating different origins for the carbon evolved from different samples. Samples from multiple locations within Gale crater evolved methane with highly fractionated carbon isotopes. We suggest three routes by which highly fractionated carbon could be deposited on Mars, with each suggesting that Martian carbon cycling is quite distinct from that of the present Earth.

Publisher

Proceedings of the National Academy of Sciences

Subject

Multidisciplinary

Link

https://pnas.org/doi/pdf/10.1073/pnas.2115651119

Reference84 articles.

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5. G. M. Wong, Enhanced Evaluation of Martian Habitability in the Past and Present: The Search for Viable Electron Donors (Pennsylvania State University, 2020).

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