Title: Martian Eolian Dust Probed by ChemCam

Abstract

Here, the ubiquitous eolian dust on Mars plays important roles in the current sedimentary and atmospheric processes of the planet. The ChemCam instrument retrieves a consistent eolian dust composition at the sub–mm scale from every first laser shot on Mars targets. Its composition presents significant differences with the Aeolis Palus soils and the Bagnold dunes as it contains lower CaO and higher SiO₂. The dust FeO and TiO₂ contents are also higher, probably associated with nanophase oxide components. The dust spectra show the presence of volatile elements (S, Cl), and the hydrogen content is similar to Bagnold sands, but lower than Aeolis Palus soils. Consequently, the dust may be a contributor to the amorphous component of soils but differences in composition indicate that the two materials are not equivalent.

Authors:

Lasue, J.  ^[1];

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• Search DOE PAGES for ORCID "0000-0001-9082-4457"

Cousin, A.  ^[1];

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• Search DOE PAGES for ORCID "0000-0001-7823-7794"

Meslin, P. -Y.  ^[2];

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• Search DOE PAGES for ORCID "0000-0002-0703-3951"

Mangold, N.  ^[1];

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Wiens, Roger Craig  ^[3];

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Berger, G.  ^[1];

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Dehouck, E.  ^[4];

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Forni, O.  ^[1];

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Goetz, W.  ^[4];

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Gasnault, Olivier  ^[1];

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Rapin, W.  ^[5];

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Schröder, S.  ^[6];

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Ollila, Ann  ^[2];

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Johnson, J.  ^[7];

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Le Mouelic, Stephane  ^[8];

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Maurice, Sylvestre ^[1]; Anderson, R.  ^[9];

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Blaney, D. L.  ^[10];

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Clark, B.  ^[11];

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Clegg, Samuel M.  ^[2]

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more »; d'Uston, C. ^[1]; Cécile, F. ^[12]; Lanza, Nina Louise  ^[2];

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Madsen, M. B.  ^[13];

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Martín-Torres, J. ^[14]; Melikechi, Noureddine  ^[15];

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Newsom, H.  ^[16];

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Sautter, V.  ^[17];

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Zorzano, M. -P.  ^[18]

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+ Show Author Affiliations

1. Univ. de Toulouse, Toulouse (France)
2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
3. Univ. de Lyon, Villeurbanne (France)
4. Max-Planck-Institut fur Sonnensystemforschung, Gottingen (Germany)
5. CalTech, Los Angeles, CA (United States)
6. DLR, Berlin (Germany)
7. Johns Hopkins Univ., Laurel, MD (United States)
8. Univ. de Nantes (France)
9. USGS, Flagstaff, AZ (United States)
10. NASA JPL, Pasadena, CA (United States)
11. Space Science Institute, Boulder, CO (United States)
12. Lorraine Univ., Vandoeuvre (France)
13. Niels Bohr Institute, Copenhagen (Denmark)
14. Lulea Univ. of Technology, Lulea (Sweden); Instituto Andaluz de Ciencias de la Tierra (UGR-CSIC), Granada (Spain)
15. Univ. of Massachusetts, Lowell, MA (United States)
16. Univ. of New Mexico, Albuquerque, NM (United States)
17. Museum d'Histoire Naturelle, Paris (France)
18. Lulea Univ. of Technology, Lulea (Sweden); Centro de Astrobiologia (INTA-CSIC), Madrid (Spain)

Publication Date:

Wed Oct 10 00:00:00 EDT 2018

Research Org.:

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:

National Aeronautics and Space Administration (NASA); USDOE

OSTI Identifier:

1477728

Report Number(s):

LA-UR-18-28848
Journal ID: ISSN 0094-8276

Grant/Contract Number:  

AC52-06NA25396

Resource Type:

Accepted Manuscript

Journal Name:

Geophysical Research Letters

Additional Journal Information:

Journal Volume: 45; Journal Issue: 20; Journal ID: ISSN 0094-8276

Publisher:

American Geophysical Union

Country of Publication:

United States

Language:

English

Subject:

58 GEOSCIENCES; Planetary Sciences; Mars; dust; ChemCam