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Ferric oxides in East Candor Chasma, Valles Marineris (Mars) inferred from analysis of OMEGA/Mars Express data: Identification and geological interpretation

Le Deit, Laetitia and Le Mouelic, Stephane and Bourgeois, Olivier and Combe, Jean-Philippe and Mege, Daniel and Sotin, Christophe and Gendrin, Aline and Hauber, Ernst and Mangold, Nicolas and Bibring, Jean-Pierre (2008) Ferric oxides in East Candor Chasma, Valles Marineris (Mars) inferred from analysis of OMEGA/Mars Express data: Identification and geological interpretation. Journal of Geophysical Research, 113 (E07), E07001. AGU. DOI: 10.1029/2007JE002950

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Official URL: http://www.agu.org/journals/je/je0807/2007JE002950/2007JE002950.pdf

Abstract

The mineralogical composition of the Martian surface is constrained by analyzing the data of the OMEGA visible and near infrared imaging spectrometer onboard Mars Express. Ferric signatures had previously been reported in Valles Marineris, Margaritifer Terra, and Terra Meridiani. Here we use three independent data reduction methods (Spectral Angle Mapper, a modified Spectral Mixture Analysis and Modified Gaussian Model) to detect and map ferric oxides in East Candor Chasma, a part of Valles Marineris. Ferric oxides in East Candor Chasma are concentrated in scattered formations. MOLA altimetry indicates that the ferric oxides are preferentially located in topographic lows. THEMIS, HRSC and MOC images show that the ferric oxide spectral signatures are systematically correlated with superficial deposits of low albedo, located at the foot of, or resting on Interior Layered Deposits (ILDs). This spatial distribution suggests that ferric oxides are genetically linked to ILDs. Gravity and wind-driven remobilization of ferric oxides previously formed in the ILDs can explain their accumulation around the ILDs.

Item URL in elib:https://elib.dlr.de/55867/
Document Type:Article
Title:Ferric oxides in East Candor Chasma, Valles Marineris (Mars) inferred from analysis of OMEGA/Mars Express data: Identification and geological interpretation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Le Deit, LaetitiaUniv. Nantes (F)UNSPECIFIED
Le Mouelic, StephaneUniv. Nantes (F)UNSPECIFIED
Bourgeois, OlivierUniv. Nantes (F)UNSPECIFIED
Combe, Jean-PhilippeSpace Science Institute, Winthrop, WA (USA)UNSPECIFIED
Mege, DanielUniv. Nantes (F)UNSPECIFIED
Sotin, ChristopheUniv. Nantes (F)UNSPECIFIED
Gendrin, AlineIAS, Orsay (F)UNSPECIFIED
Hauber, ErnstUNSPECIFIEDUNSPECIFIED
Mangold, NicolasUniversite Paris-Sud (F)UNSPECIFIED
Bibring, Jean-PierreIAS, Orsay (F)UNSPECIFIED
Date:July 2008
Journal or Publication Title:Journal of Geophysical Research
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:113
DOI :10.1029/2007JE002950
Page Range:E07001
Publisher:AGU
Status:Published
Keywords:Mars, sediments, HRSC, OMEGA
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Projekt MARS-EXPRESS / HRSC (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Hauber, Ernst
Deposited On:25 Nov 2008
Last Modified:12 Dec 2013 20:33

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