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Infrared spectrometric data of basaltic Martian analogues from Mongolian terranes and the Baikal Rift Zone

Gurgurewicz, J. and Maturilli, A. and Helbert, J. (2008) Infrared spectrometric data of basaltic Martian analogues from Mongolian terranes and the Baikal Rift Zone. In: EPSC Abstracts, 3, p. 412. 3rd European Planetary Science Congress, 2008-09-21 - 2008-09-26, Münster, Westfalen (Germany).

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Abstract

<b>Introduction</b> <p>Infrared spectroscopy has been used to analyse the composition of the rock material of basaltic Martian analogues from Mongolian terranes and the southern part of the Baikal Rift Zone, for comparison of the results with those of Martian missions. Collected samples of basalts derive from various geologic environments (rift zone, island-arc, ophiolite). Microscopic observations in thin sections show diversification of composition and structures of basalts. The most diversified are basalts from the Mandalovoo terrane [1].</p> <b>Transmittance data </b> <p>Transmittance spectra of the samples have been recorded in the range from 400 to 2000 cm<sup>−1</sup> for the particle size &lt;25 μm (Fig. 1). The results indicate the presence of the main components of basalts (plagioclases, pyroxenes and olivines), in different proportions, accessory minerals (leucite, analcime) and often of the products of their alteration, e.g. saponite [1]. Comparison with the long wavelength channel data of the Planetary Fourier Spectrometer of the Mars Express mission indicates similar absorption bands of clinopyroxenes in both spectra [1].</p> <b>Emissivity measurements</b> <p>As the next step of the spectroscopic analysis of these basalts, measurements of the emissivity have been taken in the Planetary Emissivity Laboratory (PEL) at the DLR, Berlin, using a Fourier transform infrared spectrometer Bruker VERTEX 80v in the wavelength range from 3 to 50 μm. For each sample we measured the spectra of four particle size ranges: &lt;25 μm, 25-63 μm, 63-125 μm and 125-250 μm (Fig. 2). Using both such wavelength and particle size ranges enlarges the possibilities of observations, interpretation and comparison with the spectrometric data from Martian missions. For the interpretation of the spectra we are using the Berlin Emissivity Database (BED), which presently contain all the most important mineral components of basaltic analogs [2]. According to the previous interpretation, the spectra show distinct absorption bands of plagioclases and pyroxenes. Presence of other characteristic bands of minerals in the spectra usually reflects the intensity of alteration of the basalts.</p> <b>References</b><br /> [1] Gurgurewicz J. and Kostylew J. (2007) EPSC2007-A-00260.<br /> [2] Maturilli A. et al. (2008) Planet. Space Sci., 56, 420-425.<br />

Document Type:Conference or Workshop Item (Speech)
Title:Infrared spectrometric data of basaltic Martian analogues from Mongolian terranes and the Baikal Rift Zone
Authors:
AuthorsInstitution or Email of Authors
Gurgurewicz, J.Space Research Centre, Polish Academy of Sciences, Warsaw, Poland
Maturilli, A.UNSPECIFIED
Helbert, J.UNSPECIFIED
Date:25 September 2008
Journal or Publication Title:EPSC Abstracts
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Volume:3
Page Range:p. 412
Status:Published
Keywords:infrared spectroscopy, Mars, analogues, martian basalts, microscopy, transmittance, Planetary Fourier Spectrometer, PFS, emissivity, PEL, Planetary Emissivity Laboratory, VERTEX 80v, BED Berlin Emissivity Database, plagioclase, pyroxene
Event Title:3rd European Planetary Science Congress
Event Location:Münster, Westfalen (Germany)
Event Type:international Conference
Event Dates:2008-09-21 - 2008-09-26
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 - Vorhaben Vergleichende Planetologie (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Physics
Deposited By: Stefanie Hempel
Deposited On:17 Oct 2008
Last Modified:27 Apr 2009 15:15

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