Journal ArticleDOI
Jarosite and hematite at Meridiani Planum from Opportunity's Mössbauer spectrometer
Göstar Klingelhöfer,R. V. Morris,B. Bernhardt,Christian Schröder,Daniel Rodionov,P. A. de Souza,Albert S. Yen,Ralf Gellert,E. N. Evlanov,B. Zubkov,J. Foh,J. Foh,Uwe Bonnes,E. Kankeleit,Philipp Gütlich,D. W. Ming,Franz Renz,Thomas J. Wdowiak,Steven W. Squyres,Raymond E. Arvidson +19 more
TLDR
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).Abstract:
Mossbauer 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 hematite-rich 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.read more
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Створення порталу інформаційно-довідкових ресурсів міністерства освіти і науки україни
TL;DR: Premises of creation of Internet portal designed to provide access to participants of educational and scientific process for the joint creation, consolidation, concentration and rapid spreading of educationaland scientific information resources in its own depository are considered.
Journal ArticleDOI
In situ evidence for an ancient aqueous environment at Meridiani Planum, Mars.
Steven W. Squyres,John P. Grotzinger,Raymond E. Arvidson,James F. Bell,Wendy M. Calvin,Philip R. Christensen,Benton C. Clark,Jeffrey Crisp,William H. Farrand,K. E. Herkenhoff,Jeffrey R. Johnson,Göstar Klingelhöfer,Andrew H. Knoll,Scott M. McLennan,Harry Y. McSween,Richard V. Morris,John W. Rice,Renate Rieder,L. A. Soderblom +18 more
TL;DR: The geologic record at Meridiani Planum suggests that conditions were suitable for biological activity for a period of time in martian history.
Journal ArticleDOI
Size-driven structural and thermodynamic complexity in iron oxides.
TL;DR: In this paper, the authors summarized recently measured thermodynamic data on the formation and surface energies of various iron oxides and showed that polymorphs metastable as micrometer-sized or larger crystals can often be thermodynamically stabilized at the nanoscale.
Journal ArticleDOI
Provenance and diagenesis of the evaporite-bearing Burns formation, Meridiani Planum, Mars
Scott M. McLennan,James F. Bell,Wendy M. Calvin,Philip R. Christensen,Benton C. Clark,P. A. de Souza,Jack D. Farmer,William H. Farrand,David A. Fike,Ralf Gellert,A. Ghosh,Timothy D. Glotch,John P. Grotzinger,B. C. Hahn,Kenneth E. Herkenhoff,Joel A. Hurowitz,Jeffrey R. Johnson,Sarah Stewart Johnson,Bradley L. Jolliff,Göstar Klingelhöfer,Andrew H. Knoll,Z. A. Learner,Michael C. Malin,Harry Y. McSween,J. M. Pocock,Steven W. Ruff,Laurence A. Soderblom,Steven W. Squyres,Nicholas J. Tosca,Wesley A. Watters,Michael B. Wyatt,Albert S. Yen +31 more
TL;DR: Impure reworked evaporitic sandstones, preserved on Meridiani Planum, Mars, are mixtures of roughly equal amounts of altered siliciclastic debris, of basaltic provenance (40−±10% by mass), and chemical constituents, dominated by evaporitic minerals (jarosite, Mg, Ca-sulfates, chlorides, Fe-, Na-solves), hematite and possibly secondary silica (60−± 10%).
Journal ArticleDOI
The Opportunity Rover's Athena science investigation at Meridiani Planum, Mars.
Steven W. Squyres,Raymond E. Arvidson,James F. Bell,J. Brückner,N. A. Cabrol,Wendy M. Calvin,Michael H. Carr,Philip R. Christensen,Benton C. Clark,Larry S. Crumpler,David J. Des Marais,Claude d’Uston,Thanasis E. Economou,Jack D. Farmer,William H. Farrand,William M. Folkner,Matthew P. Golombek,S. P. Gorevan,John A. Grant,Ronald Greeley,John P. Grotzinger,Larry A. Haskin,Kenneth E. Herkenhoff,Stubbe F. Hviid,Jeffrey R. Johnson,Göstar Klingelhöfer,Andrew H. Knoll,G. Landis,Mark T. Lemmon,R. Li,Morten Madsen,Michael C. Malin,Scott M. McLennan,Harry Y. McSween,D. W. Ming,Jeffrey E. Moersch,Richard V. Morris,T. J. Parker,J. W. Rice,Lutz Richter,Rudolf Rieder,M. Sims,M. D. Smith,Paul S. Smith,Laurence A. Soderblom,Ryan C. Sullivan,Heinrich Wänke,Thomas J. Wdowiak,M. J. Wolff,Albert S. Yen +49 more
TL;DR: The Mars Exploration Rover Opportunity has investigated the landing site in Eagle crater and the nearby plains within Meridiani Planum, and the rocks are interpreted to be a mixture of chemical and siliciclastic sediments formed by episodic inundation by shallow surface water, followed by evaporation, exposure, and desiccation.
References
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BookDOI
Mössbauer spectroscopy applied to inorganic chemistry
Gary J. Long,Fernande Grandjean +1 more
TL;DR: The early days of the effect of Mossbauer spectroscopy on hard magnetic materials are described in this paper... and the potential of using it in the field of biological mineralization is discussed.
Journal ArticleDOI
In situ evidence for an ancient aqueous environment at Meridiani Planum, Mars.
Steven W. Squyres,John P. Grotzinger,Raymond E. Arvidson,James F. Bell,Wendy M. Calvin,Philip R. Christensen,Benton C. Clark,Jeffrey Crisp,William H. Farrand,K. E. Herkenhoff,Jeffrey R. Johnson,Göstar Klingelhöfer,Andrew H. Knoll,Scott M. McLennan,Harry Y. McSween,Richard V. Morris,John W. Rice,Renate Rieder,L. A. Soderblom +18 more
TL;DR: The geologic record at Meridiani Planum suggests that conditions were suitable for biological activity for a period of time in martian history.
Journal ArticleDOI
The Opportunity Rover's Athena science investigation at Meridiani Planum, Mars.
Steven W. Squyres,Raymond E. Arvidson,James F. Bell,J. Brückner,N. A. Cabrol,Wendy M. Calvin,Michael H. Carr,Philip R. Christensen,Benton C. Clark,Larry S. Crumpler,David J. Des Marais,Claude d’Uston,Thanasis E. Economou,Jack D. Farmer,William H. Farrand,William M. Folkner,Matthew P. Golombek,S. P. Gorevan,John A. Grant,Ronald Greeley,John P. Grotzinger,Larry A. Haskin,Kenneth E. Herkenhoff,Stubbe F. Hviid,Jeffrey R. Johnson,Göstar Klingelhöfer,Andrew H. Knoll,G. Landis,Mark T. Lemmon,R. Li,Morten Madsen,Michael C. Malin,Scott M. McLennan,Harry Y. McSween,D. W. Ming,Jeffrey E. Moersch,Richard V. Morris,T. J. Parker,J. W. Rice,Lutz Richter,Rudolf Rieder,M. Sims,M. D. Smith,Paul S. Smith,Laurence A. Soderblom,Ryan C. Sullivan,Heinrich Wänke,Thomas J. Wdowiak,M. J. Wolff,Albert S. Yen +49 more
TL;DR: The Mars Exploration Rover Opportunity has investigated the landing site in Eagle crater and the nearby plains within Meridiani Planum, and the rocks are interpreted to be a mixture of chemical and siliciclastic sediments formed by episodic inundation by shallow surface water, followed by evaporation, exposure, and desiccation.
Journal ArticleDOI
Detection of crystalline hematite mineralization on Mars by the Thermal Emission Spectrometer: Evidence for near‐surface water
Philip R. Christensen,Joshua L. Bandfield,Roger N. Clark,Kenneth S. Edgett,Victoria E. Hamilton,Todd M. Hoefen,Hugh H. Kieffer,Ruslan O. Kuzmin,Melissa D. Lane,Michael C. Malin,Richard V. Morris,John C. Pearl,R. Pearson,Ted L. Roush,Steven W. Ruff,M. D. Smith +15 more
TL;DR: In this paper, the TES instrument on the Mars Global Surveyor (MGS) mission has discovered a remarkable accumulation of crystalline hematite ((alpha-Fe2O3) that covers an area with very sharp boundaries approximately 350 by 350-750 km in size centered near 2 S latitude between 0 and 5 W longitude (Sinus Meridiani).
Journal ArticleDOI
Chemistry of rocks and soils at Meridiani Planum from the Alpha Particle X-ray Spectrometer.
Rudolf Rieder,Ralf Gellert,Robert C. Anderson,J. Brückner,Benton C. Clark,Gerlind Dreibus,Thanasis E. Economou,Göstar Klingelhöfer,G. W. Lugmair,D. W. Ming,Steven W. Squyres,Claude d’Uston,Heinrich Wänke,Albert S. Yen,Jutta Zipfel +14 more
TL;DR: The Alpha Particle X-ray Spectrometer on the Opportunity rover determined major and minor elements of soils and rocks in Meridiani Planum, indicating the interaction with water in the past is indicated by the chemical features in rocks and soils.
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In situ evidence for an ancient aqueous environment at Meridiani Planum, Mars.
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Provenance and diagenesis of the evaporite-bearing Burns formation, Meridiani Planum, Mars
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