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Bounce Rock - A shergottite-like basalt encountered at Meridiani Planum, Mars

Citation

Zipfel, J and Schroder, C and Jolliff, BL and Gellert, R and Herkenhoff, KE and Rieder, R and Anderson, R and Bell III, JF and Bruckner, J and Crisp, JA and Christensen, PR and Clark, BC and de Souza Jr, PA and Dreibus, G and d'Uston, C and Economou, T and Gorevan, SP and Hahn, BC and Klingelhofer, G and McCoy, TJ and McSween Jr, HY and Ming, DW and Morris, RV and Rodionov, DS and Squyres, SW and Wanke, H and Wright, SP and Wyatt, MB and Yen, AS, Bounce Rock - A shergottite-like basalt encountered at Meridiani Planum, Mars, Meteoritics and Planetary Science, (1-20 (2011)) EJ ISSN 1945-5100 (2011) [Refereed Article]


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Copyright Statement

Copyright 2011 The Meteoritical Society

DOI: doi:10.1111/j.1945-5100.2010.01127.x

Abstract

The Opportunity rover of the Mars Exploration Rover mission encountered an isolated rock fragment with textural, mineralogical, and chemical properties similar to basaltic shergottites. This finding was confirmed by all rover instruments, and a comprehensive study of these results is reported here. Spectra from the miniature thermal emission spectrometer and the Panoramic Camera reveal a pyroxene-rich mineralogy, which is also evident in Mo ̈ ssbauer spectra and in normative mineralogy derived from bulk chemistry measured by the alpha particle X-ray spectrometer. The correspondence of Bounce Rock’s chemical composition with the composition of certain basaltic shergottites, especially Elephant Moraine (EET) 79001 lithology B and Queen Alexandra Range (QUE) 94201, is very close, with only Cl, Fe, and Ti exhibiting deviations. Chemical analyses further demonstrate characteristics typical of Mars such as the Fe⁄Mn ratio and P 1 Ó The Meteoritical Society, 2011. 2 J. Zipfel et al. concentrations. Possible shock features support the idea that Bounce Rock was ejected from an impact crater, most likely in the Meridiani Planum region. Bopolu crater, 19.3 km in diameter, located 75 km to the southwest could be the source crater. To date, no other rocks of this composition have been encountered by any of the rovers on Mars. The finding of Bounce Rock by the Opportunity rover provides further direct evidence for an origin of basaltic shergottite meteorites from Mars.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geochemistry
Research Field:Exploration Geochemistry
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:de Souza Jr, PA (Professor Paulo de Souza Junior)
ID Code:77469
Year Published:2011
Web of Science® Times Cited:24
Deposited By:Computing and Information Systems
Deposited On:2012-04-18
Last Modified:2012-06-22
Downloads:0

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