Soil Diversity and Hydration as Observed by ChemCam at Gale Crater, Mars

P.-Y. Meslin*, O. Gasnault, O. Forni, S. Schröder, A. Cousin, G. Berger, S.M. Clegg, J. Lasue, S. Maurice, V. Sautter, S. Le Mouélic, R.C. Wiens, C. Fabre, W. Goetz, D. Bish, N. Mangold, B. Ehlmann, N. Lanza, A.-M. Harri, R. AndersonE. Rampe, T.H. McConnochie, P. Pinet, D. Blaney, R. Leveille, D. Archer, B. Barraclough, S. Bender, D. Blake, J. G. Blank, N. Bridges, B. C. Clark, L. DeFlores, D. Delapp, G. Dromart, M. D. Dyar, M. Fisk, B. Gondet, J. Grotzinger, K. Herkenhoff, J. Johnson, J.-L. Lacour, Y. Langevin, L. Leshin, E. Lewin, M. B. Madsen, N. Melikechi, A. Mezzacappa, M. A. Mischna, MSL Science Team

*Corresponding author for this work

Research output: Contribution to journalArticle

159 Citations (Scopus)

Abstract

The ChemCam instrument, which provides insight into martian soil chemistry at the submillimeter scale, identified two principal soil types along the Curiosity rover traverse: a fine-grained mafic type and a locally derived, coarse-grained felsic type. The mafic soil component is representative of widespread martian soils and is similar in composition to the martian dust. It possesses a ubiquitous hydrogen signature in ChemCam spectra, corresponding to the hydration of the amorphous phases found in the soil by the CheMin instrument. This hydration likely accounts for an important fraction of the global hydration of the surface seen by previous orbital measurements. ChemCam analyses did not reveal any significant exchange of water vapor between the regolith and the atmosphere. These observations provide constraints on the nature of the amorphous phases and their hydration.
Original languageEnglish
Number of pages10
JournalScience
Volume341
Issue number6153
DOIs
Publication statusPublished - 27 Sep 2013

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    Meslin, P-Y., Gasnault, O., Forni, O., Schröder, S., Cousin, A., Berger, G., Clegg, S. M., Lasue, J., Maurice, S., Sautter, V., Mouélic, S. L., Wiens, R. C., Fabre, C., Goetz, W., Bish, D., Mangold, N., Ehlmann, B., Lanza, N., Harri, A-M., ... MSL Science Team (2013). Soil Diversity and Hydration as Observed by ChemCam at Gale Crater, Mars. Science, 341(6153). https://doi.org/10.1126/science.1238670