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Mid-infrared reflectance spectroscopy of synthetic glass analogs for Mercury surface studies

Morlok, A. and Renggli, Christian and Charlier, Bernard and Reitze, Maximilian P. and Klemme, Stephan and Namur, Olivier and Sohn, M. and Martin, Dayl and Weber, Iris and Stojic, Aleksandra N. and Hiesinger, H. and Joy, Katherine H. and Wogelius, Roy and Tollan, Peter and Carli, Cristian and Bauch, Karin E. and Helbert, Jörn (2021) Mid-infrared reflectance spectroscopy of synthetic glass analogs for Mercury surface studies. Icarus, 361, p. 114363. Elsevier. doi: 10.1016/j.icarus.2021.114363. ISSN 0019-1035.

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Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0019103521000579

Abstract

We have synthesized and analyzed by mid-infrared reflectance spectroscopy silicate glasses that are representative for the glasses on the surface of Mercury. The glass compositions are based on high-pressure laboratory experiments and the resulting compositions of the glass phase. The spectra are of interest for investigating the surface of Mercury using the MERTIS (Mercury Radiometer and Thermal Infrared Spectrometer) instrument on board of the ESA/JAXA BepiColombo mission. Both powdered fractions and polished blocks have been analyzed. Powdered size fractions of 0–25 μm, 25-63 μm, 63-125 μm, and 125–250 μm were measured in reflectance in the thermal infrared (2–20 μm). Spectra for powdered bulk glasses (1.6 wt% - 19.0 wt% MgO) show a single, dominating Reststrahlenband (RB, 9.3–9.8 μm), a Christiansen Feature (CF; 7.6 μm - 8.1 μm), and a size dependent Transparency Feature (TF; 11.6–11.9 μm). Micro-FTIR analyses of polished blocks of glasses (3.4–26.5 wt% MgO) have characteristic bands at 7.8–8.2 μm (CF), and 9.3–9.9 μm (RB). Only few olivine crystalline features were observed. Spectral features correlate with compositional characteristics, e.g. SiO2 content or SCFM (SiO2/(SiO2 + CaO + FeO + MgO) index. The strongest correlation between band features CF and the strong RB are with Mg/Si. No simple mixture of glass spectra from this study is able to reproduce the entire ground based spectrum of the surface of Mercury. However, Mg-rich glasses reproduce identified features at 8.5 μm, 9.9 μm and 12.4 μm.

Item URL in elib:https://elib.dlr.de/142557/
Document Type:Article
Title:Mid-infrared reflectance spectroscopy of synthetic glass analogs for Mercury surface studies
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Morlok, A.Westfälische Wilhelms-Universität MünsterUNSPECIFIED
Renggli, ChristianInstitut für Planetologie, Westfälische Wilhelms-Universität Münster, GermanyUNSPECIFIED
Charlier, BernardInstitut für Planetologie, Westfälische Wilhelms-Universität Münster, GermanyUNSPECIFIED
Reitze, Maximilian P.Westfälische Wilhelms-Universität MünsterUNSPECIFIED
Klemme, StephanInstitut für Planetologie, Westfälische Wilhelms-Universität Münster, GermanyUNSPECIFIED
Namur, OlivierGeology, Leuven (Arenberg), BelgiumUNSPECIFIED
Sohn, M.hochschule emden/leer, constantiaplatz 4, 26723 emden, germanyUNSPECIFIED
Martin, DaylInstitut für Planetologie, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, GermanyUNSPECIFIED
Weber, IrisWestfälische Wilhelms-Universität MünsterUNSPECIFIED
Stojic, Aleksandra N.Westfälische Wilhelms-Universität MünsterUNSPECIFIED
Hiesinger, H.Institut für Planetologie, Westfälische Wilhelms-Universität, GermanyUNSPECIFIED
Joy, Katherine H.School of Earth, Atmospheric and Environmental Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, UKUNSPECIFIED
Wogelius, RoySchool of Earth, Atmospheric and Environmental Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, UKUNSPECIFIED
Tollan, Peternstitut für Geologie, Baltzerstrasse 1+3, 3012 Bern, SwitzerlandUNSPECIFIED
Carli, CristianIASF-INAF, Rome, ItalyUNSPECIFIED
Bauch, Karin E.Westfälische Wilhelms-Universität MünsterUNSPECIFIED
Helbert, JörnJoern.Helbert (at) dlr.dehttps://orcid.org/0000-0001-5346-9505
Date:2021
Journal or Publication Title:Icarus
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:361
DOI :10.1016/j.icarus.2021.114363
Page Range:p. 114363
Publisher:Elsevier
ISSN:0019-1035
Status:Published
Keywords:Mercury spectroscopy glass
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 Jun 2021 07:02
Last Modified:03 Jun 2021 07:02

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