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Composition Analysis of Martian surface by near-infrared imaging spectroscopy

Beinroth, A. and Arnold, G. (1994) Composition Analysis of Martian surface by near-infrared imaging spectroscopy. Vibrational Spectroscopy. Elsevier, Amsterdam, Netherlands.

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Abstract

Reflectance Spectra of Mars obtained by the imaging spectrometer (ISM) in the wavelength range from 0.76 to 3.16 muem allows us to study the surface composition. This information is given by typical absorption features in the spectra of the Martian soil minerals. A band of atmospherc CO2 near 2 muem was used to compute relative heigths of the surface and the air mass factor. The most prominent spectral characteristics related to the Martian surface are found to be variations in infrared brightness, of the continuum slope, of absorption features between 2.2 and 2.5 muem, of a bound water band at 3 muem, and of a complex Fe+, Fe3+ -absorption near 1 muem. It hasbeen shown that the depth of these factors is not correlated with theair mass factor. The bands at 2.2 and 3 muem can be used to study the variation of surface hydratation. The 3-m-band is a comlex feature of bound water. There is an indication that the 2.2-muem- signature may be attributed to an A-OH stretching mode of hydrated minerals. The variation of spectral characteristics is shown in spectral maps and the comparison of these maps with surface brightness, laboratory measurements, and geological units on Mars allows us to discuss the variation of surface composition. Spectra of the Tharsis Montes region show high spectral contrasts in the 2.2-muem-band. This bright material seems to be more hydrated. Inthe dark areas of Valles Marineris and Syrtis Major Planitia a broad ferric-ferrous absorption occurs.

Document Type:Article
Additional Information: event_title=Scandinavian Symposium on Infrared and Raman Spectroscopy, Bergen, 30 May - 1 June 1994, LIDO-Berichtsjahr=1994,
Title:Composition Analysis of Martian surface by near-infrared imaging spectroscopy
Authors:
AuthorsInstitution or Email of Authors
Beinroth, A.UNSPECIFIED
Arnold, G.UNSPECIFIED
Date:1994
Journal or Publication Title:Vibrational Spectroscopy
Refereed publication:Yes
In ISI Web of Science:Yes
Publisher:Elsevier, Amsterdam, Netherlands
Status:Published
Keywords:Remote Sensing, Infrared Spectrometry, Spectral Units, Mars Surface
HGF - Research field:UNSPECIFIED
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:no assignment
DLR - Research theme (Project):UNSPECIFIED
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Institut für Planetenerkundung
Deposited By: elib DLR-Beauftragter
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 09:46

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