Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/17125
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Indication of drier periods on Mars from the chemistry and mineralogy of atmospheric dust (Letter)
Authors: Goetz, Walter
Bertelsen, Preben
Binau, Charlotte S
Gunnlaugsson, Haraldur P
Hviid, Stubbe
Kinch, Kjartan M
Madsen, Daniel E
Madsen, Morten Bo
Olsen, Malte
Gellert, Ralf
Klingelhoefer, Goestar
Ming, Douglas Wayne
Morris, Richard Van
Rieder, Rudolf
Schröder, Christian
Contact Email: christian.schroeder@stir.ac.uk
Issue Date: 7-Jul-2005
Publisher: Nature Publishing Group
Citation: Goetz W, Bertelsen P, Binau CS, Gunnlaugsson HP, Hviid S, Kinch KM, Madsen DE, Madsen MB, Olsen M, Gellert R, Klingelhoefer G, Ming DW, Morris RV, Rieder R & Schröder C (2005) Indication of drier periods on Mars from the chemistry and mineralogy of atmospheric dust (Letter), Nature, 436 (7047), pp. 62-65.
Abstract: The ubiquitous atmospheric dust on Mars is well mixed by periodic global dust storms, and such dust carries information about the environment in which it once formed and hence about the history of water on Mars. The Mars Exploration Rovers have permanent magnets to collect atmospheric dust for investigation by instruments on the rovers. Here we report results from Mössbauer spectroscopy and X-ray fluorescence of dust particles captured from the martian atmosphere by the magnets. The dust on the magnets contains magnetite and olivine; this indicates a basaltic origin of the dust and shows that magnetite, not maghemite, is the mineral mainly responsible for the magnetic properties of the dust. Furthermore, the dust on the magnets contains some ferric oxides, probably including nanocrystalline phases, so some alteration or oxidation of the basaltic dust seems to have occurred. The presence of olivine indicates that liquid water did not play a dominant role in the processes that formed the atmospheric dust.
Type: Journal Article
URI: http://hdl.handle.net/1893/17125
DOI Link: http://dx.doi.org/10.1038/nature03807
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Notes: Additional co-authors: Daniel S Rodionov, Paulo A de Souza, Jr, Steve W Squyres, Tom Wdowiak, Albert Yen
Affiliation: Max Planck Institute of Solar System Research
University of Copenhagen
University of Copenhagen
Aarhus University
Max Planck Institute of Solar System Research
Aarhus University
University of Copenhagen
University of Copenhagen
University of Copenhagen
Max Planck Institute of Chemistry
Johannes Gutenberg University of Mainz
National Aeronautics and Space Administration (NASA)
National Aeronautics and Space Administration (NASA)
Max Planck Institute of Chemistry
Biological and Environmental Sciences

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