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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. |
| 39317 |
authorList |
authors |
| 39317 |
issue |
6169 |
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status |
peerReviewed |
| 39317 |
volume |
343 |
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type |
AcademicArticle |
| 39317 |
type |
Article |
| 39317 |
label |
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. |
| 39317 |
label |
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. |
| 39317 |
Title |
Elemental geochemistry of sedimentary rocks at Yellowknife Bay, Gale Crater, Mars |
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in dataset |
oro |