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dc.contributor.authorMorris, Richard Vanen_UK
dc.contributor.authorKlingelhoefer, Goestaren_UK
dc.contributor.authorSchröder, Christianen_UK
dc.contributor.authorRodionov, Daniel Sen_UK
dc.contributor.authorYen, Albert Sen_UK
dc.contributor.authorMing, Douglas Wayneen_UK
dc.contributor.authorde Souza Jr, Paulo Aen_UK
dc.contributor.authorFleischer, Irisen_UK
dc.contributor.authorWdowiak, Thomas Jen_UK
dc.contributor.authorGellert, Ralfen_UK
dc.contributor.authorBernhardt, Bodoen_UK
dc.contributor.authorEvlanov, E Nen_UK
dc.contributor.authorZubkov, B Ven_UK
dc.contributor.authorFoh, Jen_UK
dc.contributor.authorBonnes, Uen_UK
dc.description.abstractThe Mössbauer spectrometer on Spirit measured the oxidation state of Fe, identified Fe-bearing phases, and measured relative abundances of Fe among those phases for surface materials on the plains and in the Columbia Hills of Gusev crater. Eight Fe-bearing phases were identified: olivine, pyroxene, ilmenite, magnetite, nanophase ferric oxide (npOx), hematite, goethite, and a Fe3+-sulfate. Adirondack basaltic rocks on the plains are nearly unaltered (Fe3+/FeT < 0.2) with Fe from olivine, pyroxene (Ol > Px), and minor npOx and magnetite. Columbia Hills basaltic rocks are nearly unaltered (Peace and Backstay), moderately altered (WoolyPatch, Wishstone, and Keystone), and pervasively altered (e.g., Clovis, Uchben, Watchtower, Keel, and Paros with Fe3+/FeT ~ 0.6–0.9). Fe from pyroxene is greater than Fe from olivine (Ol sometimes absent), and Fe2+ from Ol + Px is 40–49% and 9–24% for moderately and pervasively altered materials, respectively. Ilmenite (Fe from Ilm 3–6%) is present in Backstay, Wishstone, Keystone, and related rocks along with magnetite (Fe from Mt 10–15%). Remaining Fe is present as npOx, hematite, and goethite in variable proportions. Clovis has the highest goethite content (Fe from Gt = 40%). Goethite (α-FeOOH) is mineralogical evidence for aqueous processes because it has structural hydroxide and is formed under aqueous conditions. Relatively unaltered basaltic soils (Fe3+/FeT ~ 0.3) occur throughout Gusev crater (60–80% Fe from Ol + Px, 10–30% from npOx, and 10% from Mt). PasoRobles soil in the Columbia Hills has a unique occurrence of high concentrations of Fe3+-sulfate (65% of Fe). Magnetite is identified as a strongly magnetic phase in Martian soil and dust.en_UK
dc.publisherAmerican Geophysical Unionen_UK
dc.relationMorris RV, Klingelhoefer G, Schröder C, Rodionov DS, Yen AS, Ming DW, de Souza Jr PA, Fleischer I, Wdowiak TJ, Gellert R, Bernhardt B, Evlanov EN, Zubkov BV, Foh J & Bonnes U (2006) Mössbauer mineralogy of rock, soil, and dust at Gusev crater, Mars: Spirit's journey through weakly altered olivine basalt on the plains and pervasively altered basalt in the Columbia Hills. Journal of Geophysical Research: Planets, 111 (E2), Art. No.: E02S13.
dc.rightsCopyright 2006 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.en_UK
dc.subjectMars Exploration Roversen_UK
dc.subjectMössbauer spectroscopyen_UK
dc.titleMössbauer mineralogy of rock, soil, and dust at Gusev crater, Mars: Spirit's journey through weakly altered olivine basalt on the plains and pervasively altered basalt in the Columbia Hillsen_UK
dc.typeJournal Articleen_UK
dc.citation.jtitleJournal of Geophysical Research: Planetsen_UK
dc.type.statusVoR - Version of Recorden_UK
dc.description.notesAdditional co-authors: E Kankeleit, P Gütlich, F Renz, SW Squyres, RE Arvidsonen_UK
dc.contributor.affiliationNational Aeronautics and Space Administration (NASA)en_UK
dc.contributor.affiliationJohannes Gutenberg University of Mainzen_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.contributor.affiliationJohannes Gutenberg University of Mainzen_UK
dc.contributor.affiliationCalifornia Institute of Technologyen_UK
dc.contributor.affiliationNational Aeronautics and Space Administration (NASA)en_UK
dc.contributor.affiliationUniversity of Tasmaniaen_UK
dc.contributor.affiliationJohannes Gutenberg University of Mainzen_UK
dc.contributor.affiliationUniversity of Alabama at Birminghamen_UK
dc.contributor.affiliationUniversity of Guelphen_UK
dc.contributor.affiliationJohannes Gutenberg University of Mainzen_UK
dc.contributor.affiliationSpace Research Institute IKI, Russiaen_UK
dc.contributor.affiliationSpace Research Institute IKI, Russiaen_UK
dc.contributor.affiliationJohannes Gutenberg University of Mainzen_UK
dc.contributor.affiliationDarmstadt University of Technology, Germanyen_UK
rioxxterms.typeJournal Article/Reviewen_UK
local.rioxx.authorMorris, Richard Van|en_UK
local.rioxx.authorKlingelhoefer, Goestar|en_UK
local.rioxx.authorSchröder, Christian|0000-0002-7935-6039en_UK
local.rioxx.authorRodionov, Daniel S|en_UK
local.rioxx.authorYen, Albert S|en_UK
local.rioxx.authorMing, Douglas Wayne|en_UK
local.rioxx.authorde Souza Jr, Paulo A|en_UK
local.rioxx.authorFleischer, Iris|en_UK
local.rioxx.authorWdowiak, Thomas J|en_UK
local.rioxx.authorGellert, Ralf|en_UK
local.rioxx.authorBernhardt, Bodo|en_UK
local.rioxx.authorEvlanov, E N|en_UK
local.rioxx.authorZubkov, B V|en_UK
local.rioxx.authorFoh, J|en_UK
local.rioxx.authorBonnes, U|en_UK
local.rioxx.projectInternal Project|University of Stirling|
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