Title: Martian Eolian Dust Probed by ChemCam

Journal Article · · Geophysical Research Letters
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  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)

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.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
NASA; USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1477728
Report Number(s):
LA-UR--18-28848
Journal Information:
Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 20 Vol. 45; ISSN 0094-8276
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English

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