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Jarosite and Hematite at Meridiani Planum from Opportunity's Mössbauer Spectrometer

by Gellert, R. , Wdowiak, T. , Bonnes, U. , Yen, A. , Arvidson, R. E. , Morris, R. V. , Klingelhöfer, G. , Zubkov, B. , Schröder, C. , Renz, F. , Evlanov, E. N. , Ming, D. W. , Bernhardt, B. , Kankeleit, E. , Gütlich, P. , Rodionov, D. S. , de Souza, P. A. , Foh, J. , Squyres, S. W.

in Basaltic soils / Climate / Composition / Data Analysis / Discovery and exploration / Extraterrestrial Environment / Ferric Compounds / Fractions / Geologic Sediments / Hematite / Impact craters / Iron Compounds / Least Squares Statistics / Magnesium Compounds / Mars / Mars (Planet) / Mars probes / Mineralogy / Minerals / Mössbauer spectroscopy / Olivine / Opportunities / Outcrops / Pyroxenes / Research Articles and Reports / Rocks / Scientific imaging / Sextets / Silicates / Soil mineralogy / Soils / Space exploration / Spacecraft / Spectroscopy, Mossbauer / Sulfates / Surface (Geology) / Water

2004

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Jarosite and Hematite at Meridiani Planum from Opportunity's Mössbauer Spectrometer

2004

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Jarosite and Hematite at Meridiani Planum from Opportunity's Mössbauer Spectrometer

2004

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Journal Article

Jarosite and Hematite at Meridiani Planum from Opportunity's Mössbauer Spectrometer

Gellert, R.,

Wdowiak, T.,

Bonnes, U.,

Yen, A.,

Arvidson, R. E.,

Morris, R. V.,

Klingelhöfer, G.,

Zubkov, B.,

Schröder, C.,

Renz, F.,

Evlanov, E. N.,

Ming, D. W.,

Bernhardt, B.,

Kankeleit, E.,

Gütlich, P.,

Rodionov, D. S.,

de Souza, P. A.,

Foh, J.,

Squyres, S. W.

2004

Overview

Mössbauer spectra measured by the Opportunity rover revealed four mineralogical components in Meridiani Planum at Eagle crater: jarosite- and hematite-rich outcrop, hematite-rich soil, olivine-bearing basaltic soil, and a pyroxene-bearing basaltic rock (Bounce rock). Spherules, interpreted to be concretions, are hematiterich and dispersed throughout the outcrop. Hematitic soils both within and outside Eagle crater are dominated by spherules and their fragments. Olivine-bearing basaltic soil is present throughout the region. Bounce rock is probably an impact erratic. Because jarosite is a hydroxide sulfate mineral, its presence at Meridiani Planum is mineralogical evidence for aqueous processes on Mars, probably under acid-sulfate conditions.

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Publisher

American Association for the Advancement of Science,The American Association for the Advancement of Science

Subject

Basaltic soils

/ Climate

/ Composition

/ Data Analysis

/ Discovery and exploration

/ Extraterrestrial Environment

/ Ferric Compounds