Mössbauer mineralogy of rock, soil, and dust at Meridiani Planum, Mars: Opportunity's journey across sulfate-rich outcrop, basaltic sand and dust, and hematite lag deposits

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Autoren

  • Richard V. Morris
  • G. Klingelhöfer
  • C. Schröder
  • D. S. Rodionov
  • Albert S. Yen
  • D. W. Ming
  • Jr A. de Souza
  • T. Wdowiak
  • I. Fleischer
  • R. Gellert
  • B. Bernhardt
  • U. Bonnes
  • B. A. Cohen
  • E. N. Evlanov
  • J. Foh
  • P. Gütlich
  • E. Kankeleit
  • T. McCoy
  • D. W. Mittlefehldt
  • F. Renz
  • M. E. Schmidt
  • B. Zubkov
  • Steven W. Squyres
  • R. E. Arvidson

Externe Organisationen

  • Johnson Space Center (JSC)
  • Johannes Gutenberg-Universität Mainz
  • RAS - Space Research Institute
  • Jet Propulsion Laboratory
  • University of Alabama at Birmingham
  • University of Guelph
  • Technische Universität Darmstadt
  • University of New Mexico
  • National Museum of Natural History
  • Cornell University
  • Washington University St. Louis
  • Smithsonian Institution
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Details

OriginalspracheEnglisch
AufsatznummerE12S15
FachzeitschriftJournal of Geophysical Research E: Planets
Jahrgang111
Ausgabenummer12
PublikationsstatusVeröffentlicht - 20 Dez. 2006
Extern publiziertJa

Abstract

The Mössbauer (MB) spectrometer on Opportunity measured the Fe oxidation state, identified Fe-bearing phases, and measured relative abundances of Fe among those phases at Meridiani Planum, Mars. Eight Fe-bearing phases were identified: jarosite (K,Na,H3O)(Fe,Al)(OH)6 (SO4)2, hematite, olivine, pyroxene, magnetite, nanophase ferric oxides (npOx), an unassigned ferric phase, and metallic Fe (kamacite). Burns Formation outcrop rocks consist of hematite-rich spherules dispersed throughout S-rich rock that has nearly constant proportions of Fe3+ from jarosite, hematite, and npOx (29%,36%, and 20% of total Fe). The high oxidation state of the S-rich rock(Fe3+/FeT ∼0.9) implies that S is present as the sulfate anion. Jarosite is mineralogical evidence for aqueous processes under acid-sulfate conditions because it has structural hydroxide and sulfate and it forms at low pH. Hematite-rich spherules, eroded from the outcrop, and their fragments are concentrated as hematite-rich soils (lag deposits) on ripple crests (up to 68% of total Fe from hematite). Olivine, pyroxene, and magnetite are primarily associated with basaltic soils and are present as thin and locally discontinuous cover over outcrop rocks, commonly forming aeolian bedforms. Basaltic soils are more reduced (Fe3+/FeT ∼0.2-0.4), with the fine-grained and bright aeolian deposits being the most oxidized. Average proportions of total Fe from olivine, pyroxene, npOx, magnetite, and hematite are ∼33%, 38%, 18%, 6%, and 4%, respectively. The MB parameters of outcrop npOx and basaltic-soil npOx are different, but it is not possible to infer mineralogical information beyond octahedrally coordinated Fe3+. Basaltic soils at Meridiani Planum and Gusev crater have similar Fe-mineralogical compositions.

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Mössbauer mineralogy of rock, soil, and dust at Meridiani Planum, Mars: Opportunity's journey across sulfate-rich outcrop, basaltic sand and dust, and hematite lag deposits. / Morris, Richard V.; Klingelhöfer, G.; Schröder, C. et al.
in: Journal of Geophysical Research E: Planets, Jahrgang 111, Nr. 12, E12S15, 20.12.2006.

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Morris, RV, Klingelhöfer, G, Schröder, C, Rodionov, DS, Yen, AS, Ming, DW, de Souza, JA, Wdowiak, T, Fleischer, I, Gellert, R, Bernhardt, B, Bonnes, U, Cohen, BA, Evlanov, EN, Foh, J, Gütlich, P, Kankeleit, E, McCoy, T, Mittlefehldt, DW, Renz, F, Schmidt, ME, Zubkov, B, Squyres, SW & Arvidson, RE 2006, 'Mössbauer mineralogy of rock, soil, and dust at Meridiani Planum, Mars: Opportunity's journey across sulfate-rich outcrop, basaltic sand and dust, and hematite lag deposits', Journal of Geophysical Research E: Planets, Jg. 111, Nr. 12, E12S15. https://doi.org/10.1029/2006JE002791
Morris, R. V., Klingelhöfer, G., Schröder, C., Rodionov, D. S., Yen, A. S., Ming, D. W., de Souza, J. A., Wdowiak, T., Fleischer, I., Gellert, R., Bernhardt, B., Bonnes, U., Cohen, B. A., Evlanov, E. N., Foh, J., Gütlich, P., Kankeleit, E., McCoy, T., Mittlefehldt, D. W., ... Arvidson, R. E. (2006). Mössbauer mineralogy of rock, soil, and dust at Meridiani Planum, Mars: Opportunity's journey across sulfate-rich outcrop, basaltic sand and dust, and hematite lag deposits. Journal of Geophysical Research E: Planets, 111(12), Artikel E12S15. https://doi.org/10.1029/2006JE002791
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title = "M{\"o}ssbauer mineralogy of rock, soil, and dust at Meridiani Planum, Mars: Opportunity's journey across sulfate-rich outcrop, basaltic sand and dust, and hematite lag deposits",
abstract = "The M{\"o}ssbauer (MB) spectrometer on Opportunity measured the Fe oxidation state, identified Fe-bearing phases, and measured relative abundances of Fe among those phases at Meridiani Planum, Mars. Eight Fe-bearing phases were identified: jarosite (K,Na,H3O)(Fe,Al)(OH)6 (SO4)2, hematite, olivine, pyroxene, magnetite, nanophase ferric oxides (npOx), an unassigned ferric phase, and metallic Fe (kamacite). Burns Formation outcrop rocks consist of hematite-rich spherules dispersed throughout S-rich rock that has nearly constant proportions of Fe3+ from jarosite, hematite, and npOx (29%,36%, and 20% of total Fe). The high oxidation state of the S-rich rock(Fe3+/FeT ∼0.9) implies that S is present as the sulfate anion. Jarosite is mineralogical evidence for aqueous processes under acid-sulfate conditions because it has structural hydroxide and sulfate and it forms at low pH. Hematite-rich spherules, eroded from the outcrop, and their fragments are concentrated as hematite-rich soils (lag deposits) on ripple crests (up to 68% of total Fe from hematite). Olivine, pyroxene, and magnetite are primarily associated with basaltic soils and are present as thin and locally discontinuous cover over outcrop rocks, commonly forming aeolian bedforms. Basaltic soils are more reduced (Fe3+/FeT ∼0.2-0.4), with the fine-grained and bright aeolian deposits being the most oxidized. Average proportions of total Fe from olivine, pyroxene, npOx, magnetite, and hematite are ∼33%, 38%, 18%, 6%, and 4%, respectively. The MB parameters of outcrop npOx and basaltic-soil npOx are different, but it is not possible to infer mineralogical information beyond octahedrally coordinated Fe3+. Basaltic soils at Meridiani Planum and Gusev crater have similar Fe-mineralogical compositions.",
author = "Morris, {Richard V.} and G. Klingelh{\"o}fer and C. Schr{\"o}der and Rodionov, {D. S.} and Yen, {Albert S.} and Ming, {D. W.} and {de Souza}, {Jr A.} and T. Wdowiak and I. Fleischer and R. Gellert and B. Bernhardt and U. Bonnes and Cohen, {B. A.} and Evlanov, {E. N.} and J. Foh and P. G{\"u}tlich and E. Kankeleit and T. McCoy and Mittlefehldt, {D. W.} and F. Renz and Schmidt, {M. E.} and B. Zubkov and Squyres, {Steven W.} and Arvidson, {R. E.}",
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issn = "0148-0227",
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Download

TY - JOUR

T1 - Mössbauer mineralogy of rock, soil, and dust at Meridiani Planum, Mars

T2 - Opportunity's journey across sulfate-rich outcrop, basaltic sand and dust, and hematite lag deposits

AU - Morris, Richard V.

AU - Klingelhöfer, G.

AU - Schröder, C.

AU - Rodionov, D. S.

AU - Yen, Albert S.

AU - Ming, D. W.

AU - de Souza, Jr A.

AU - Wdowiak, T.

AU - Fleischer, I.

AU - Gellert, R.

AU - Bernhardt, B.

AU - Bonnes, U.

AU - Cohen, B. A.

AU - Evlanov, E. N.

AU - Foh, J.

AU - Gütlich, P.

AU - Kankeleit, E.

AU - McCoy, T.

AU - Mittlefehldt, D. W.

AU - Renz, F.

AU - Schmidt, M. E.

AU - Zubkov, B.

AU - Squyres, Steven W.

AU - Arvidson, R. E.

PY - 2006/12/20

Y1 - 2006/12/20

N2 - The Mössbauer (MB) spectrometer on Opportunity measured the Fe oxidation state, identified Fe-bearing phases, and measured relative abundances of Fe among those phases at Meridiani Planum, Mars. Eight Fe-bearing phases were identified: jarosite (K,Na,H3O)(Fe,Al)(OH)6 (SO4)2, hematite, olivine, pyroxene, magnetite, nanophase ferric oxides (npOx), an unassigned ferric phase, and metallic Fe (kamacite). Burns Formation outcrop rocks consist of hematite-rich spherules dispersed throughout S-rich rock that has nearly constant proportions of Fe3+ from jarosite, hematite, and npOx (29%,36%, and 20% of total Fe). The high oxidation state of the S-rich rock(Fe3+/FeT ∼0.9) implies that S is present as the sulfate anion. Jarosite is mineralogical evidence for aqueous processes under acid-sulfate conditions because it has structural hydroxide and sulfate and it forms at low pH. Hematite-rich spherules, eroded from the outcrop, and their fragments are concentrated as hematite-rich soils (lag deposits) on ripple crests (up to 68% of total Fe from hematite). Olivine, pyroxene, and magnetite are primarily associated with basaltic soils and are present as thin and locally discontinuous cover over outcrop rocks, commonly forming aeolian bedforms. Basaltic soils are more reduced (Fe3+/FeT ∼0.2-0.4), with the fine-grained and bright aeolian deposits being the most oxidized. Average proportions of total Fe from olivine, pyroxene, npOx, magnetite, and hematite are ∼33%, 38%, 18%, 6%, and 4%, respectively. The MB parameters of outcrop npOx and basaltic-soil npOx are different, but it is not possible to infer mineralogical information beyond octahedrally coordinated Fe3+. Basaltic soils at Meridiani Planum and Gusev crater have similar Fe-mineralogical compositions.

AB - The Mössbauer (MB) spectrometer on Opportunity measured the Fe oxidation state, identified Fe-bearing phases, and measured relative abundances of Fe among those phases at Meridiani Planum, Mars. Eight Fe-bearing phases were identified: jarosite (K,Na,H3O)(Fe,Al)(OH)6 (SO4)2, hematite, olivine, pyroxene, magnetite, nanophase ferric oxides (npOx), an unassigned ferric phase, and metallic Fe (kamacite). Burns Formation outcrop rocks consist of hematite-rich spherules dispersed throughout S-rich rock that has nearly constant proportions of Fe3+ from jarosite, hematite, and npOx (29%,36%, and 20% of total Fe). The high oxidation state of the S-rich rock(Fe3+/FeT ∼0.9) implies that S is present as the sulfate anion. Jarosite is mineralogical evidence for aqueous processes under acid-sulfate conditions because it has structural hydroxide and sulfate and it forms at low pH. Hematite-rich spherules, eroded from the outcrop, and their fragments are concentrated as hematite-rich soils (lag deposits) on ripple crests (up to 68% of total Fe from hematite). Olivine, pyroxene, and magnetite are primarily associated with basaltic soils and are present as thin and locally discontinuous cover over outcrop rocks, commonly forming aeolian bedforms. Basaltic soils are more reduced (Fe3+/FeT ∼0.2-0.4), with the fine-grained and bright aeolian deposits being the most oxidized. Average proportions of total Fe from olivine, pyroxene, npOx, magnetite, and hematite are ∼33%, 38%, 18%, 6%, and 4%, respectively. The MB parameters of outcrop npOx and basaltic-soil npOx are different, but it is not possible to infer mineralogical information beyond octahedrally coordinated Fe3+. Basaltic soils at Meridiani Planum and Gusev crater have similar Fe-mineralogical compositions.

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U2 - 10.1029/2006JE002791

DO - 10.1029/2006JE002791

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JO - Journal of Geophysical Research E: Planets

JF - Journal of Geophysical Research E: Planets

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