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A mid-infrared study of synthetic glass and crystal mixtures analog to the geochemical terranes on mercury

Morlok, Andreas and Renggli, Christian and Charlier, Bernard and Namur, Olivier and Klemme, Stephan and Reitze, Maximilian P. and Weber, Iris and Stojic, Aleksandra N. and Bauch, Karin E. and Hiesinger, Harald and Helbert, Jörn (2023) A mid-infrared study of synthetic glass and crystal mixtures analog to the geochemical terranes on mercury. Icarus, 396, p. 115498. Elsevier. doi: 10.1016/j.icarus.2023.115498. ISSN 0019-1035.

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Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0019103523000751


The MERTIS (MErcury Radiometer and Thermal Infrared Spectrometer) onboard of the BepiColombo ESA/JAXA mission to Mercury will map the surface of Mercury in the wavelength range of 7–14 μm and for the interpretation of these spectra a database of analog materials is needed. We analyzed bulk grain size fractions of a series of analog materials relevant to the distinct terranes of Mercury in diffuse reflectance in the mid-infrared (2.5 μm to 18 μm). Mineral mixtures cover a wide range of modal amounts of forsterite, enstatite, diopside and plagioclase, the resulting spectra can be divided into three distinct groups: (1) is dominated by a single glass feature, (2) by forsterite bands, and (3) by pyroxene bands. Despite often high contents, plagioclase features, are usually ‘overprinted’ by forsterite and pyroxene bands. Spectral parameter CF, an easy obtainable proxy for chemistry (SiO2) and polymerization (SCFM) places the hermean mixtures mostly in the intermediate and basaltic range. The correlation of parameters easily obtainable in remote sensing, Mg/Si ratio, and CF, allows differing materials from high-energy evaporation processes in impacts from such formed in igneous processes. Preliminary comparison with a spectrum covering most of the hermean surface shows some similarity with band positions of the Inter Crater Plain and Heavily Cratered Terrains (IcP-HCT) and High-Mg Northern Volcanic Plains (High-Mg NVP) mixtures, but none of our spectra is able to reproduce the remote sensing data entirely.

Item URL in elib:https://elib.dlr.de/195657/
Document Type:Article
Title:A mid-infrared study of synthetic glass and crystal mixtures analog to the geochemical terranes on mercury
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Morlok, AndreasInstitut für Planetologie, Westfälische Wilhelms-Universität Münster, GermanyUNSPECIFIEDUNSPECIFIED
Renggli, ChristianInstitut für Planetologie, Westfälische Wilhelms-Universität Münster, GermanyUNSPECIFIEDUNSPECIFIED
Charlier, BernardDepartment of Geology, University of Liege, 4000 Sart-Tilman, BelgiumUNSPECIFIEDUNSPECIFIED
Namur, OlivierDepartment of Earth and Environmental Sciences, KU Leuven, 3001 Leuven, BelgiumUNSPECIFIEDUNSPECIFIED
Klemme, StephanInstitut für Planetologie, Westfälische Wilhelms-Universität Münster, GermanyUNSPECIFIEDUNSPECIFIED
Reitze, Maximilian P.Westfälische Wilhelms-Universität MünsterUNSPECIFIEDUNSPECIFIED
Weber, IrisWestfälische Wilhelms-Universität MünsterUNSPECIFIEDUNSPECIFIED
Stojic, Aleksandra N.Westfälische Wilhelms-Universität MünsterUNSPECIFIEDUNSPECIFIED
Bauch, Karin E.Westfälische Wilhelms-Universität MünsterUNSPECIFIEDUNSPECIFIED
Hiesinger, HaraldWestfalische Wilhelms-Universitat, Muenster, GermanyUNSPECIFIEDUNSPECIFIED
Helbert, JörnUNSPECIFIEDhttps://orcid.org/0000-0001-5346-9505UNSPECIFIED
Date:26 February 2023
Journal or Publication Title:Icarus
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:p. 115498
Keywords:Mercury, surface, Mineralogy, Infrared observations, Instrumentation, Spectroscopy, Earth Science
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:27 Jun 2023 10:34
Last Modified:19 Oct 2023 15:23

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