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Visible and near-infrared multispectral analysis of rocks at Meridiani Planum, Mars, by the Mars Exploration Rover Opportunity

Farrand, W. H. and Bell, J. F., III and Johnson, J. R. and Jolliff, B. L. and Knoll, A. H. and McLennan, S. M. and Squyres, S. W. and Calvin, W. M. and Grotzinger, J. P. and Morris, R. V. and Soderblom, J. and Thompson, S. D. and Watters, W. A. and Yen, A. S. (2007) Visible and near-infrared multispectral analysis of rocks at Meridiani Planum, Mars, by the Mars Exploration Rover Opportunity. Journal of Geophysical Research E, 112 (E6). Art. No. E06S02. ISSN 0148-0227. https://resolver.caltech.edu/CaltechAUTHORS:20130228-100639573

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Abstract

Multispectral measurements in the visible and near infrared of rocks at Meridiani Planum by the Mars Exploration Rover Opportunity's Pancam are described. The Pancam multispectral data show that the outcrops of the Burns formation consist of two main spectral units which in stretched 673, 535, 432 nm color composites appear buff- and purple-colored. These units are referred to as the HFS and LFS spectral units based on higher and lower values of 482 to 535 nm slope. Spectral characteristics are consistent with the LFS outcrop consisting of less oxidized, and the HFS outcrop consisting of more oxidized, iron-bearing minerals. The LFS surfaces are not as common and appear, primarily, at the distal ends of outcrop layers and on steep, more massive surfaces, locations that are subject to greater eolian erosion. Consequently, the HFS surfaces are interpreted as a weathering rind. Further inherent spectral differences between layers and between different outcrop map units, both untouched and patches abraded by the rover's Rock Abrasion Tool, are also described. Comparisons of the spectral parameters of the Meridiani outcrop with a set of laboratory reflectance measurements of Fe^(3+)–bearing minerals show that the field of outcrop measurements plots near the fields of hematite, ferrihydrite, poorly crystalline goethite, and schwertmannite. Rind and fracture fill materials, observed intermittently at outcrop exposures, are intermediate in their spectral character between both the HFS and LFS spectral classes and other, less oxidized, surface materials (basaltic sands, spherules, and cobbles).


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1029/2006JE002773DOIArticle
http://onlinelibrary.wiley.com/doi/10.1029/2006JE002773/abstractPublisherArticle
ORCID:
AuthorORCID
Bell, J. F., III0000-0002-2006-4074
Johnson, J. R.0000-0002-5586-4901
Knoll, A. H.0000-0003-1308-8585
McLennan, S. M.0000-0003-4259-7178
Grotzinger, J. P.0000-0001-9324-1257
Soderblom, J.0000-0003-3715-6407
Additional Information:© 2007 American Geophysical Union. Received 12 June 2006; revised 13 September 2006; accepted 5 January 2007; published 26 April 2007. We are grateful to the dedication and professionalism of the entire Athena science team and to the engineers who have made this mission so successful. Funding for Athena science team members was provided by NASA contracts through Cornell and the Jet Propulsion Laboratory. Thanks to Rongxing Li and Yunhang Chen of Ohio State University for Opportunity traverse maps. We are also grateful to helpful reviews by Gregg Swayze and John Mustard.
Issue or Number:E6
Record Number:CaltechAUTHORS:20130228-100639573
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20130228-100639573
Official Citation:Farrand, W. H., et al. (2007), Visible and near-infrared multispectral analysis of rocks at Meridiani Planum, Mars, by the Mars Exploration Rover Opportunity, J. Geophys. Res., 112, E06S02, doi:10.1029/2006JE002773.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37196
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:28 Feb 2013 19:36
Last Modified:09 Mar 2020 13:19

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