elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Kontakt | English
Schriftgröße: [-] Text [+]

Schwertmannite on Mars? Spectroscopic analyses of schwertmannite, its relationship to other ferric minerals, and its possible presence in the surface material on Mars

Bishop, J. und Murad, E.(1) (1996) Schwertmannite on Mars? Spectroscopic analyses of schwertmannite, its relationship to other ferric minerals, and its possible presence in the surface material on Mars. In: Mineral Spectroscopy : A Tribute to Roger G. Burns / Editors: M.D. Dyar, C. McCammon and M.W. Schaefer Geochemical Society, New York, USA. Seiten 337-358.

Dieses Archiv kann nicht den gesamten Text zur Verfügung stellen.

Kurzfassung

Schwertmannite, a hydroxylated ferric sulfate mineral, is presented as a possible component of the surface material on Mars. Schwertmannite could have formed on Mars through chemical weathering processes as acidic groundwater came in contact with the atmosphere. Visible and infrared spectra of schwertmannite are presented here and analyzed in context of spectra of other ferric minerals and Mars soil analogs. Infrared transmittance spectra and Moessbauer spectra of schwertmannite are studied as well to facilitate interpretation of the reflectance spectra. The visible region spectra of schwertmannite are similar to those of jarosite andakaganeite in that they are dominated by a broad Fe3+ transition near0.91 muem and a local reflectance maximum near 0.73 muem. Spectra of schwertmannite are relatively bright in the near infrared and exhibit broad bound and absorbed water features near 1.45, 1.95 and 3 muem. The mid-infrared region spectra are significantly darker and include a water feature near 6.1 muem and several weak sulfate and OH features at longer wavelengths. The formation conditions and spectral features of schwertmannite are consistent with those of the ferric sulfate phase present in chemically-treated ferric sulfate- bearing montmorillonites, which have been examined as Mars soil analogs. Methods suitable for detecting the possible presence of schwertmannite in the Martian surface soils are discussed, as well as implications for the surface geochemistry of Mars should schwertmannite occur there.

Dokumentart:Beitrag im Sammelband
Zusätzliche Informationen: LIDO-Berichtsjahr=1996,
Titel:Schwertmannite on Mars? Spectroscopic analyses of schwertmannite, its relationship to other ferric minerals, and its possible presence in the surface material on Mars
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Bishop, J.NICHT SPEZIFIZIERT
Murad, E.(1)NICHT SPEZIFIZIERT
Datum:1996
Erschienen in:Mineral Spectroscopy : A Tribute to Roger G. Burns / Editors: M.D. Dyar, C. McCammon and M.W. Schaefer
Referierte Publikation:Ja
In ISI Web of Science:Nein
Seitenbereich:Seiten 337-358
Verlag:Geochemical Society, New York, USA
Status:veröffentlicht
Stichwörter:Mars, Spectroscopy, Schwertmannite, Iron, Water
HGF - Forschungsbereich:NICHT SPEZIFIZIERT
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EW - Erforschung des Weltraums
DLR - Schwerpunkt:NICHT SPEZIFIZIERT
DLR - Forschungsgebiet:W EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):NICHT SPEZIFIZIERT
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Institut für Planetenerkundung
Hinterlegt von: elib DLR-Beauftragter
Hinterlegt am:02 Apr 2006
Letzte Änderung:27 Apr 2009 09:50

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Copyright © 2008-2013 Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.