Organic molecules in the Sheepbed Mudstone, Gale Crater, Mars

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dc.contributor.author Freissinet, C. en_US
dc.contributor.author Glavin, D. P. en_US
dc.contributor.author Mahaffy, P. R. en_US
dc.contributor.author Miller, K. E. en_US
dc.contributor.author Eigenbrode, J. L. en_US
dc.contributor.author Summons, R. E. en_US
dc.contributor.author Brunner, A. E. en_US
dc.contributor.author Buch, A. en_US
dc.contributor.author Szopa, C. en_US
dc.contributor.author Archer, P. D. en_US
dc.contributor.author Franz, H. B. en_US
dc.contributor.author Atreya, S. K. en_US
dc.contributor.author Brinckerhoff, W. B. en_US
dc.contributor.author Cabane, M. en_US
dc.contributor.author Coll, P. en_US
dc.contributor.author Conrad, P. G. en_US
dc.contributor.author Des Marais, D. J. en_US
dc.contributor.author Dworkin, J. P. en_US
dc.contributor.author Fairén, A. G. en_US
dc.contributor.author François, P. en_US
dc.contributor.author Grotzinger, J. P. en_US
dc.contributor.author Kashyap, S. en_US
dc.contributor.author Kate, I. L. en_US
dc.contributor.author Leshin, L. A. en_US
dc.contributor.author Malespin, C. A. en_US
dc.contributor.author Martin, M. G. en_US
dc.contributor.author Martin‐torres, F. J. en_US
dc.contributor.author McAdam, A. C. en_US
dc.contributor.author Ming, D. W. en_US
dc.contributor.author Navarro‐gonzález, R. en_US
dc.contributor.author Pavlov, A. A. en_US
dc.contributor.author Prats, B. D. en_US
dc.contributor.author Squyres, S. W. en_US
dc.contributor.author Steele, A. en_US
dc.contributor.author Stern, J. C. en_US
dc.contributor.author Sumner, D. Y. en_US
dc.contributor.author Sutter, B. en_US
dc.contributor.author Zorzano, M.‐p. en_US
dc.date.accessioned 2015-05-04T20:36:41Z
dc.date.available 2016-05-10T20:26:28Z en
dc.date.issued 2015-03 en_US
dc.identifier.citation Freissinet, C.; Glavin, D. P.; Mahaffy, P. R.; Miller, K. E.; Eigenbrode, J. L.; Summons, R. E.; Brunner, A. E.; Buch, A.; Szopa, C.; Archer, P. D.; Franz, H. B.; Atreya, S. K.; Brinckerhoff, W. B.; Cabane, M.; Coll, P.; Conrad, P. G.; Des Marais, D. J.; Dworkin, J. P.; Fairén, A. G. ; François, P. ; Grotzinger, J. P.; Kashyap, S.; Kate, I. L.; Leshin, L. A.; Malespin, C. A.; Martin, M. G.; Martin‐torres, F. J. ; McAdam, A. C.; Ming, D. W.; Navarro‐gonzález, R. ; Pavlov, A. A.; Prats, B. D.; Squyres, S. W.; Steele, A.; Stern, J. C.; Sumner, D. Y.; Sutter, B.; Zorzano, M.‐p. (2015). "Organic molecules in the Sheepbed Mudstone, Gale Crater, Mars." Journal of Geophysical Research: Planets 120(3): 495-514. en_US
dc.identifier.issn 2169-9097 en_US
dc.identifier.issn 2169-9100 en_US
dc.identifier.uri http://hdl.handle.net/2027.42/111191
dc.description.abstract The Sample Analysis at Mars (SAM) instrument on board the Mars Science Laboratory Curiosity rover is designed to conduct inorganic and organic chemical analyses of the atmosphere and the surface regolith and rocks to help evaluate the past and present habitability potential of Mars at Gale Crater. Central to this task is the development of an inventory of any organic molecules present to elucidate processes associated with their origin, diagenesis, concentration, and long‐term preservation. This will guide the future search for biosignatures. Here we report the definitive identification of chlorobenzene (150–300 parts per billion by weight (ppbw)) and C2 to C4 dichloroalkanes (up to 70 ppbw) with the SAM gas chromatograph mass spectrometer (GCMS) and detection of chlorobenzene in the direct evolved gas analysis (EGA) mode, in multiple portions of the fines from the Cumberland drill hole in the Sheepbed mudstone at Yellowknife Bay. When combined with GCMS and EGA data from multiple scooped and drilled samples, blank runs, and supporting laboratory analog studies, the elevated levels of chlorobenzene and the dichloroalkanes cannot be solely explained by instrument background sources known to be present in SAM. We conclude that these chlorinated hydrocarbons are the reaction products of Martian chlorine and organic carbon derived from Martian sources (e.g., igneous, hydrothermal, atmospheric, or biological) or exogenous sources such as meteorites, comets, or interplanetary dust particles.Key PointsFirst in situ evidence of nonterrestrial organics in Martian surface sedimentsChlorinated hydrocarbons identified in the Sheepbed mudstone by SAMOrganics preserved in sample exposed to ionizing radiation and oxidative condition en_US
dc.publisher Wiley Periodicals, Inc. en_US
dc.publisher McGraw‐Hill en_US
dc.subject.other oxychlorine en_US
dc.subject.other organic molecules en_US
dc.subject.other chlorobenzene en_US
dc.subject.other MSL en_US
dc.subject.other Mars en_US
dc.subject.other SAM en_US
dc.title Organic molecules in the Sheepbed Mudstone, Gale Crater, Mars en_US
dc.type Article en_US
dc.rights.robots IndexNoFollow en_US
dc.subject.hlbsecondlevel Geological Sciences en_US
dc.subject.hlbtoplevel Science en_US
dc.description.peerreviewed Peer Reviewed en_US
dc.description.bitstreamurl http://deepblue.lib.umich.edu/bitstream/2027.42/111191/1/jgre20375.pdf
dc.identifier.doi 10.1002/2014JE004737 en_US
dc.identifier.source Journal of Geophysical Research: Planets en_US
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dc.owningcollname Interdisciplinary and Peer-Reviewed
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