|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)|
Binau, Charlotte S
Gunnlaugsson, Haraldur P
Kinch, Kjartan M
Madsen, Daniel E
Madsen, Morten Bo
Ming, Douglas Wayne
Morris, Richard Van
|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.|
|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|
|62.pdf||167.35 kB||Adobe PDF||Under Embargo until 31/12/2999 Request a copy|
Note: If any of the files in this item are currently embargoed, you can request a copy directly from the author by clicking the padlock icon above. However, this facility is dependant on the depositor still being contactable at their original email address.
This item is protected by original copyright
Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
If you believe that any material held in STORRE infringes copyright, please contact email@example.com providing details and we will remove the Work from public display in STORRE and investigate your claim.