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Mid-infrared reflectance spectroscopy of carbonaceous chondrites and Calcium-Aluminum-rich inclusions

Morlok, A. and Schiller, Benjamin and Weber, Iris and Daswani, Mohit Melwani and Stojic, Aleksandra N. and Reitze, Maximilian P. and Gramse, Tim and Wolters, Stephen D. and Hiesinger, H. and Grady, M. M. and Helbert, Jörn (2020) Mid-infrared reflectance spectroscopy of carbonaceous chondrites and Calcium-Aluminum-rich inclusions. Planetary and Space Science, 193, p. 105078. Elsevier. doi: 10.1016/j.pss.2020.105078. ISSN 0032-0633.

Full text not available from this repository.

Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0032063320302919

Abstract

We obtained mid-infrared reflectance spectra of powdered size fractions (0–25 ​μm, 25–63 ​μm, 63–125 ​μm and 125–250 ​μm) of 5 carbonaceous chondrites HaH 280 (CK4), Allende (CV3), NWA 10574 (CM2) and Murchison (CM2), and C2 (ungrouped) Tagish Lake. In addition, in-situ micro-FTIR reflectance spectra of CAIs in Allende, Ornans and Vigarano have been made. These spectra are part of a database for the comparison with remote sensing data of asteroids and planetary bodies, but also for laboratory studies of meteorites. Carbonaceous chondrites HaH 280 (CK4), Allende (CV3) and NWA 10574 (CM2) show mid-IR spectra with Reststrahlen bands (RB) dominated by forsterite and pyroxene features. The transparency features (TF) are at 12.1 ​μm–12.9 ​μm and the Christiansen features (CF) at 8.5 ​μm–9.3 ​μm. Murchison (CM2) and ungrouped Tagish Lake (C2) show mainly phyllosilicate features in their spectra. The CF is between 8.6 ​μm and 9.0 ​μm. Micro-FTIR spectra of CAIs from Allende, Vigarano, and Ornans have spinel features between 14.1 ​μm and 14.3 ​μm. In addition, melilite was identified in the Vigarano and Ornans samples with characteristic features at 11.7 ​μm and 12.4 ​μm. Nepheline and sodalite features have been identified around 14 ​μm in the Allende CAI as alteration phases resulting from thermal metamorphism. A band shift in spinel with increasing Fe content from thermal metamorphism could be spectral indicator for parent body metamorphism. A comparison with other bulk samples from the same meteorites/type shows high similarity. Comparison of the finest size fractions modelled in emissivity with remote sensing data of asteroids shows some similarity between a linear mixture of Allende and Murchison and the spectra of asteroid 253 Mathilde. However, the main 10 ​μm plateau is clearly shifted by 0.5 ​μm between asteroid and meteorite spectra. Also, the general band shapes are different. Differences between asteroidal environment (e.g. fairy castle structure) and laboratory make direct comparisons difficult.

Item URL in elib:https://elib.dlr.de/138216/
Document Type:Article
Title:Mid-infrared reflectance spectroscopy of carbonaceous chondrites and Calcium-Aluminum-rich inclusions
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Morlok, A.Westfälische Wilhelms-Universität MünsterUNSPECIFIED
Schiller, BenjaminWestfälische Wilhelms-Universität MünsterUNSPECIFIED
Weber, IrisWestfälische Wilhelms-Universität MünsterUNSPECIFIED
Daswani, Mohit MelwaniWestfälische Wilhelms-Universität MünsterUNSPECIFIED
Stojic, Aleksandra N.Westfälische Wilhelms-Universität MünsterUNSPECIFIED
Reitze, Maximilian P.Westfälische Wilhelms-Universität MünsterUNSPECIFIED
Gramse, TimWestfälische Wilhelms-Universität MünsterUNSPECIFIED
Wolters, Stephen D.Westfälische Wilhelms-Universität MünsterUNSPECIFIED
Hiesinger, H.Westfälische Wilhelms-Universität, Institut für Planetologie, Münster, GermanyUNSPECIFIED
Grady, M. M.The Open University, Milton Keynes, MK7 6AA, UKUNSPECIFIED
Helbert, JörnJoern.Helbert (at) dlr.dehttps://orcid.org/0000-0001-5346-9505
Date:2020
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:193
DOI :10.1016/j.pss.2020.105078
Page Range:p. 105078
Publisher:Elsevier
ISSN:0032-0633
Status:Published
Keywords:chondriten, meteoriten, Reflektanz, Spektroskopie
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project BepiColombo - MERTIS and BELA
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Laboratories
Deposited By: Helbert, Dr.rer.nat. Jörn
Deposited On:26 Nov 2020 09:29
Last Modified:26 Nov 2020 09:29

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