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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Geochemical properties of rocks and soils in Gusev Crater, Mars: Results of the Alpha Particle X-Ray Spectrometer from Cumberland Ridge to Home Plate
Author(s): Ming, Douglas Wayne
Gellert, Ralf
Morris, Richard Van
Arvidson, Raymond E
Brueckner, Johannes
Clark, Benton C
Cohen, Barbara A
d'Uston, Claude
Economou, Thanasis E Tom
Fleischer, Iris
Klingelhoefer, Goestar
McCoy, Timothy J
Mittlefehldt, David W
Schmidt, Mariek E
Schröder, Christian
Squyres, Steven W
Treguier, Erwan
Yen, Albert S
Zipfel, Jutta
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Keywords: Mars
Issue Date: 19-Dec-2008
Date Deposited: 24-Oct-2013
Citation: Ming DW, Gellert R, Morris RV, Arvidson RE, Brueckner J, Clark BC, Cohen BA, d'Uston C, Economou TET, Fleischer I, Klingelhoefer G, McCoy TJ, Mittlefehldt DW, Schmidt ME, Schröder C, Squyres SW, Treguier E, Yen AS & Zipfel J (2008) Geochemical properties of rocks and soils in Gusev Crater, Mars: Results of the Alpha Particle X-Ray Spectrometer from Cumberland Ridge to Home Plate. Journal of Geophysical Research: Planets, 113 (E12), Art. No.: E12S39.
Abstract: Geochemical diversity of rocks and soils has been discovered by the Alpha Particle X-Ray Spectrometer (APXS) during Spirit’s journey over Husband Hill and down into the Inner Basin from sol 470 to 1368. The APXS continues to operate nominally with no changes in calibration or spectral degradation over the course of the mission. Germanium has been added to the Spirit APXS data set with the confirmation that it occurs at elevated levels in many rocks and soils around Home Plate. Twelve new rock classes and two new soil classes have been identified at the Spirit landing site since sol 470 on the basis of the diversity in APXS geochemistry. The new rock classes are Irvine (alkaline basalt), Independence (low Fe outcrop), Descartes (outcrop similar to Independence with higher Fe and Mn), Algonquin (mafic-ultramafic igneous sequence), Barnhill (volcaniclastic sediments enriched in Zn, Cl, and Ge), Fuzzy Smith (high Si and Ti rock), Elizabeth Mahon (high Si, Ni, and Zn outcrop and rock), Halley (hematite-rich outcrop and rock), Montalva (high K, hematite-rich rock), Everett (high Mg, magnetite-rich rock), Good Question (high Si, low Mn rock), and Torquas (high K, Zn, and Ni magnetite-rich rock). New soil classes are Gertrude Weise (very high Si soil) and Eileen Dean (high Mg, magnetite-rich soil). Aqueous processes have played a major role in the formation and alteration of rocks and soils on Husband Hill and in the Inner Basin.
DOI Link: 10.1029/2008JE003195
Rights: Copyright 2008 by the American Geophysical Union. AGU allows authors to deposit their journal articles if the version is the final published citable version of record, the AGU copyright statement is clearly visible on the posting, and the posting is made 6 months after official publication by the AGU.

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