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Measurements to Estimate the Spectrometric Detection Limit for Carbonates in Martian Soil

Wagner, C. and Wäsch, R. (1994) Measurements to Estimate the Spectrometric Detection Limit for Carbonates in Martian Soil. EGS, XIX General Assembly, Grenoble, France, 25-29 April 1994.

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Abstract

Theoretical considerations of Mars climate evolution and conceptions about the weathering processes of Martian crustal rocks suggest that carbonate minerals might be present as likely secondary minerals in the soil and dust on Mars. Until now, however, no clear spectral evidence for carbonates on the surface on Mars has been found. (With the exception that Pollack et al. detected a 6.7 m absorption band that was tentatively assigned to carbonate or bicarbonate anions in a distorted crystalline site status in the atmospheric dust). Therefore the search for carbonate on Mars goes on. In the present study palagonite (an amorphous ferric-iron silica gel) and tholeiite (a basalt) are used as two Martian soil analogue materials and mixed with various percentages of carbonates (siderite, dolomite). By measurement of the samples' spectral reflectace in thewavelength range 1 to 17 muem it is investigated which spectral contrast (or band intensity) results at the diagnostic wavelengths for the various carbonate contents. The data obtained can be used to estimate limits for the spectrometric detection of these minerals.

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=1994,
Title:Measurements to Estimate the Spectrometric Detection Limit for Carbonates in Martian Soil
Authors:
AuthorsInstitution or Email of Authors
Wagner, C.UNSPECIFIED
Wäsch, R.UNSPECIFIED
Date:1994
Status:Published
Keywords:Spektrometrie; Mars; Karbonate; Palagonit
Event Title:EGS, XIX General Assembly, Grenoble, France, 25-29 April 1994
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 09:45

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