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dc.contributor.authorMing, Douglas Wayneen_UK
dc.contributor.authorMittlefehldt, David Wen_UK
dc.contributor.authorMorris, Richard Vanen_UK
dc.contributor.authorGolden, D Cen_UK
dc.contributor.authorGellert, Ralfen_UK
dc.contributor.authorYen, Albert Sen_UK
dc.contributor.authorClark, Benton Cen_UK
dc.contributor.authorSquyres, Steven Wen_UK
dc.contributor.authorFarrand, William Hen_UK
dc.contributor.authorRuff, Steven Wen_UK
dc.contributor.authorArvidson, Raymond Een_UK
dc.contributor.authorKlingelhoefer, Goestaren_UK
dc.contributor.authorMcSween, Harry Yen_UK
dc.contributor.authorRodionov, Daniel Sen_UK
dc.contributor.authorSchröder, Christianen_UK
dc.contributor.authorde Souza Jr, Paulo Aen_UK
dc.contributor.authorWang, Alianen_UK
dc.description.abstractWater played a major role in the formation and alteration of rocks and soils in the Columbia Hills. The extent of alteration ranges from moderate to extensive. Five distinct rock compositional classes were identified; the order for degree of alteration is Watchtower = Clovis >Wishstone = Peace > Backstay. The rover’s wheels uncovered one unusual soil (Paso Robles) that is the most S-rich material encountered. Clovis class rocks have compositions similar to Gusev plains soil but with higher Mg, Cl, and Br and lower Ca and Zn; Watchtower and Wishstone classes have high Al, Ti, and P and low Cr and Ni; Peace has high Mg and S and low Al, Na, and K; Backstay basalts have high Na and K compared to plains Adirondack basalts; and Paso Robles soil has high S and P. Some rocks are corundum-normative, indicating that their primary compositions were changed by loss and/or gain of rock-forming elements. Clovis materials consist of magnetite, nanophase ferric-oxides (npOx), hematite, goethite, Ca-phosphates, Ca- and Mg-sulfates, pyroxene, and secondary aluminosilicates. Wishstone and Watchtower rocks consist of Fe-oxides/oxyhydroxides, ilmenite, Ca-phosphate, pyroxene, feldspar, Mg-sulfates, and secondary aluminosilicates. Peace consists of magnetite, npOx, Mg- and Ca-sulfates, pyroxene, olivine, feldspar, apatite, halides, and secondary aluminosilicates. Paso Robles consists of Fe3+-, Mg-, Ca-, and other sulfates, Ca-phosphates, hematite, halite, allophane, and amorphous silica. Columbia Hills outcrops and rocks may have formed by the aqueous alteration of basaltic rocks, volcaniclastic materials, and/or impact ejecta by solutions that were rich in acid-volatile elements.en_UK
dc.publisherAmerican Geophysical Unionen_UK
dc.relationMing DW, Mittlefehldt DW, Morris RV, Golden DC, Gellert R, Yen AS, Clark BC, Squyres SW, Farrand WH, Ruff SW, Arvidson RE, Klingelhoefer G, McSween HY, Rodionov DS, Schröder C, de Souza Jr PA & Wang A (2006) Geochemical and mineralogical indicators for aqueous processes in the Columbia Hills of Gusev crater, Mars. Journal of Geophysical Research: Planets, 111 (E2), Art. No.: E02S12.
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.subjectaqueous processesen_UK
dc.subjectGusev Crateren_UK
dc.titleGeochemical and mineralogical indicators for aqueous processes in the Columbia Hills of Gusev crater, Marsen_UK
dc.typeJournal Articleen_UK
dc.citation.jtitleJournal of Geophysical Research: Planetsen_UK
dc.type.statusVoR - Version of Recorden_UK
dc.contributor.affiliationNational Aeronautics and Space Administration (NASA)en_UK
dc.contributor.affiliationNational Aeronautics and Space Administration (NASA)en_UK
dc.contributor.affiliationNational Aeronautics and Space Administration (NASA)en_UK
dc.contributor.affiliationEngineering and Science Contract Group, Texasen_UK
dc.contributor.affiliationUniversity of Guelphen_UK
dc.contributor.affiliationCalifornia Institute of Technologyen_UK
dc.contributor.affiliationLockheed Martin Corporationen_UK
dc.contributor.affiliationCornell Universityen_UK
dc.contributor.affiliationSpace Science Instituteen_UK
dc.contributor.affiliationArizona State Universityen_UK
dc.contributor.affiliationWashington University In Saint Louisen_UK
dc.contributor.affiliationJohannes Gutenberg University of Mainzen_UK
dc.contributor.affiliationUniversity of Tennesseeen_UK
dc.contributor.affiliationJohannes Gutenberg University of Mainzen_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.contributor.affiliationUniversity of Tasmaniaen_UK
dc.contributor.affiliationWashington University In Saint Louisen_UK
rioxxterms.typeJournal Article/Reviewen_UK
local.rioxx.authorMing, Douglas Wayne|en_UK
local.rioxx.authorMittlefehldt, David W|en_UK
local.rioxx.authorMorris, Richard Van|en_UK
local.rioxx.authorGolden, D C|en_UK
local.rioxx.authorGellert, Ralf|en_UK
local.rioxx.authorYen, Albert S|en_UK
local.rioxx.authorClark, Benton C|en_UK
local.rioxx.authorSquyres, Steven W|en_UK
local.rioxx.authorFarrand, William H|en_UK
local.rioxx.authorRuff, Steven W|en_UK
local.rioxx.authorArvidson, Raymond E|en_UK
local.rioxx.authorKlingelhoefer, Goestar|en_UK
local.rioxx.authorMcSween, Harry Y|en_UK
local.rioxx.authorRodionov, Daniel S|en_UK
local.rioxx.authorSchröder, Christian|0000-0002-7935-6039en_UK
local.rioxx.authorde Souza Jr, Paulo A|en_UK
local.rioxx.authorWang, Alian|en_UK
local.rioxx.projectInternal Project|University of Stirling|
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