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Elemental geochemistry of sedimentary rocks at Yellowknife Bay, Gale Crater, Mars

McLennan, S. M.; Anderson, R. B.; Bell III, J. F.; Bridges, J. C.; Calef III, J. F.; Campbell, J. L.; Clark, B. C.; Clegg, S.; Conrad, P.; Cousin, A.; Des Marais, D. J.; Dromart, G.; Dyar, M. D.; Edgar, L. A.; Ehlmann, B. L.; Fabre, C.; Forni, O.; Gasnault, O.; Gellert, R.; Gordon, S.; Grant, J. A.; Grotzinger, J. P.; Gupta, S.; Herkenhoff, K. E.; Hurowitz, J. A.; King, P. L.; Le Mouélic, S.; Leshin, L. A.; Léveille, R.; Lewis, K. W.; Mangold, N.; Maurice, S.; Ming, D. W.; Morris, R. V.; Nachon, M.; Newsom, H. E.; Olilla, A. M.; Perrett, G. M.; Rice, M. S.; Schmidt, M. E.; Schwenzer, S. P.; Stack, K.; Stolper, E. M.; Sumner, D. Y.; Treiman, A. H.; VanBommel, S.; Vaniman, D. T.; Vasavada, A.; Wiens, R. C.; Yingst, R. A. and Science Team, MSL (2014). Elemental geochemistry of sedimentary rocks at Yellowknife Bay, Gale Crater, Mars. Science, 343(6169), article no. 1244734.

DOI (Digital Object Identifier) Link: https://doi.org/10.1126/science.1244734
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Abstract

Sedimentary rocks examined by the Curiosity rover at Yellowknife Bay, Mars, were derived from sources that evolved from an approximately average martian crustal composition to one influenced by alkaline basalts. No evidence of chemical weathering is preserved, indicating arid, possibly cold, paleoclimates and rapid erosion and deposition. The absence of predicted geochemical variations indicates that magnetite and phyllosilicates formed by diagenesis under low-temperature, circumneutral pH, rock-dominated aqueous conditions. Analyses of diagenetic features (including concretions, raised ridges, and fractures) at high spatial resolution indicate that they are composed of iron- and halogen-rich components, magnesium-iron-chlorine–rich components, and hydrated calcium sulfates, respectively. Composition of a cross-cutting dike-like feature is consistent with sedimentary intrusion. The geochemistry of these sedimentary rocks provides further evidence for diverse depositional and diagenetic sedimentary environments during the early history of Mars.

Item Type: Journal Item
Copyright Holders: 2014 by the American Association for the Advancement of Science
ISSN: 1095-9203
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetSP-11-134-SKUK Space Agency
Extra Information: Special issue: Exploring Martian Habitability
Keywords: Mars Science Laboratory; geochemistry
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Environment, Earth and Ecosystem Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Space
Related URLs:
Item ID: 39317
Depositing User: Susanne Schwenzer
Date Deposited: 27 Jan 2014 09:14
Last Modified: 07 Dec 2018 10:21
URI: http://oro.open.ac.uk/id/eprint/39317
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