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Mid-infrared reflectance spectroscopy of aubrite components

Morlok, A. and Weber, Iris and Stojic, Aleksandra and Sohn, M. and Bischoff, Addi and Martin, Dayl and Hiesinger, Harald and Helbert, Jörn (2020) Mid-infrared reflectance spectroscopy of aubrite components. Meteoritics and Planetary Science, 55 (9), pp. 2080-2096. Wiley. doi: 10.1111/maps.13568. ISSN 1086-9379.

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Official URL: https://onlinelibrary.wiley.com/doi/10.1111/maps.13568


Aubrites Peña Blanca Spring and Norton County were studied in the mid‐infrared reflectance as part of a database for the MERTIS (Mercury Radiometer and Thermal Infrared Spectrometer) instrument on the ESA/JAXA BepiColombo mission to Mercury. Spectra of bulk powder size fractions from Peña Blanca Spring show enstatite Reststrahlen bands (RB) at 9 µm, 9.3 µm, 9.9 µm, 10.4 µm, and 11.6 µm. The transparency feature (TF) is at 12.7 µm, the Christiansen feature (CF) at 8.1–8.4 µm. Micro‐FTIR of spots with enstatite composition in Norton County and Peña Blanca Spring shows four types: Types I and II are similar to the bulk powder spectra but vary in band shape and probably display axis orientation. Type III has characteristic strong RB at 9.2 µm, 10.4 µm, and 10.5 µm, and at 11.3 µm. Type IV is characterized by a strong RB at 10.8−11.1 µm. Types III and IV could show signs of incipient shock metamorphism. Bulk results of this study confirm earlier spectral studies of aubrites that indicate a high degree of homogeneity and probably make the results of this study representative for spectral studies of an aubrite parent body. Spectral types I and II occur in all mineralogical settings (mineral clasts, matrix, melt, fragments in melt vein), while spectral type III was only observed among the clasts, and type IV in the melt. Comparison with surface spectra of Mercury does not obtain a suitable fit, only type IV spectra from quenched impact glass show similarity, in particular the 11 µm feature. Results of this study will be available upon request or via the IRIS database (Münster) and the Berlin Emissivity Database (BED).

Item URL in elib:https://elib.dlr.de/138221/
Document Type:Article
Title:Mid-infrared reflectance spectroscopy of aubrite components
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Morlok, A.Westfälische Wilhelms-Universität MünsterUNSPECIFIED
Weber, IrisWestfälische Wilhelms-Universität MünsterUNSPECIFIED
Stojic, AleksandraWestfälische Wilhelms-Universität MünsterUNSPECIFIED
Sohn, M.Hochschule Emden/Leer, Constantiaplatz 4, 26723 Emden, GermanyUNSPECIFIED
Bischoff, AddiInstitut für Planetologie, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, GermanyUNSPECIFIED
Martin, DaylInstitut für Planetologie, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, GermanyUNSPECIFIED
Hiesinger, HaraldWestfaelische Wilhelms Univ. MünsterUNSPECIFIED
Helbert, JörnJoern.Helbert (at) dlr.dehttps://orcid.org/0000-0001-5346-9505
Journal or Publication Title:Meteoritics and Planetary Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1111/maps.13568
Page Range:pp. 2080-2096
Keywords:Aubrite, Meteoriten, Merkur, 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:03 Dec 2020 13:37
Last Modified:04 Dec 2020 07:59

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