Clay mineral diversity and abundance in sedimentary rocks of Gale crater, Mars
Author
Bristow, Thomas F.Rampe, Elizabeth B.
Achilles, Cherie N.
Blake, David F.
Chipera, Steve J.
Craig, Patricia
Crisp, Joy A.
Des Marais, David J.
Downs, Robert T.
Gellert, Ralf
Grotzinger, John P.
Gupta, Sanjeev
Hazen, Robert M.
Horgan, Briony
Hogancamp, Joanna V.
Mangold, Nicolas
Mahaffy, Paul R.
McAdam, Amy C.
Ming, Doug W.
Morookian, John Michael
Morris, Richard V.
Morrison, Shaunna M.
Treiman, Allan H.
Vaniman, David T.
Vasavada, Ashwin R.
Yen, Albert S.
Affiliation
Univ Arizona, Dept GeosciIssue Date
2018-06
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AMER ASSOC ADVANCEMENT SCIENCECitation
F. Bristow, Thomas & Rampe, Elizabeth & N. Achilles, Cherie & F. Blake, David & Chipera, Steve & Craig, Patricia & A. Crisp, Joy & Desmarais, David & T. Downs, Robert & Gellert, Ralf & P. Grotzinger, John & Gupta, Sanjeev & Hazen, Robert & Horgan, Briony & V. Hogancamp, Joanna & Mangold, Nicolas & Mahaffy, P & Mcadam, Amy & W. Ming, Doug & S. Yen, Albert. (2018). Clay mineral diversity and abundance in sedimentary rocks of Gale crater, Mars. Science Advances. 4. eaar3330. 10.1126/sciadv.aar3330.Journal
SCIENCE ADVANCESRights
Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
Clay minerals provide indicators of the evolution of aqueous conditions and possible habitats for life on ancient Mars. Analyses by the Mars Science Laboratory rover Curiosity show that similar to 3.5-billion year (Ga) fluvio-lacustrine mudstones in Gale crater contain up to similar to 28 weight % (wt %) clay minerals. We demonstrate that the species of clay minerals deduced from x-ray diffraction and evolved gas analysis show a strong paleoenvironmental dependency. While perennial lake mudstones are characterized by Fe-saponite, we find that stratigraphic intervals associated with episodic lake drying contain Al-rich, Fe3+-bearing dioctahedral smectite, with minor (3 wt %) quantities of ferripyrophyllite, interpreted as wind-blown detritus, found in candidate aeolian deposits. Our results suggest that dioctahedral smectite formed via near-surface chemical weathering driven by fluctuations in lake level and atmospheric infiltration, a process leading to the redistribution of nutrients and potentially influencing the cycling of gases that help regulate climate.Note
Open access journal.ISSN
2375-2548PubMed ID
29881776Version
Final published versionSponsors
UK Space Agency (UKSA) [ST/J005169/1, ST/N000579/1]; Centre National d'Etudes Spatial (CNES); NASA's MSL Participating Scientist programAdditional Links
http://advances.sciencemag.org/lookup/doi/10.1126/sciadv.aar3330ae974a485f413a2113503eed53cd6c53
10.1126/sciadv.aar3330
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Except where otherwise noted, this item's license is described as Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
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