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Spectral Properties and Physical Extent of Pyroclastic Deposits on Mercury: Variability Within Selected Deposits and Implications for Explosive Volcanism

Besse, S. and Doressoundiram, A. and Barraud, O. and Griton, L. and Cornet, T. and Muñoz, C. and Varatharajan, Indhu and Helbert, Jörn (2020) Spectral Properties and Physical Extent of Pyroclastic Deposits on Mercury: Variability Within Selected Deposits and Implications for Explosive Volcanism. JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 125 (5), e05879. Wiley. doi: 10.1029/2018JE005879. ISSN 2169-9097.

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2018JE005879

Abstract

Explosive volcanism on the surface of planet Mercury is visible through the pyroclastic deposits that surround morphologic features often identified as the vent. Those deposits are known as faculae. The understanding of explosive volcanism provides important information on Mercury's geological, thermal, and volcanic history. Observations by the MESSENGER spacecraft are used to analyze in detail the spectral properties of 14 selected faculae with the aim of understanding their chemical and physical properties. Scientific observations obtained by the MASCS instrument are particularly suitable for this task, although their observational and geometrical constraints limit definitive conclusions. Nonetheless, spectral properties in the visible, ultraviolet and near‐infrared indicate that the selected faculae are probably larger than visible in images solely. Spectral parameters provide a means to isolate Mercury's pyroclastic deposits with respect to Mercury's average spectral behavior. The similar spectral behavior of the visible, ultraviolet and near‐infrared domains suggests that the amount of mixing of pyroclastic materials with the underlying material, the differences in grain sizes between and inside the faculae, and the presence of opaque/mineral phases, could play significant roles in the spectral properties observed. Observations by the BepiColombo mission in nadir configuration covering a large range of phase angles will be highly complementary to the MESSENGER observations.

Item URL in elib:https://elib.dlr.de/138796/
Document Type:Article
Title:Spectral Properties and Physical Extent of Pyroclastic Deposits on Mercury: Variability Within Selected Deposits and Implications for Explosive Volcanism
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Besse, S.Aurora Technology BV for ESA, European Space Agency, Madrid, SpainUNSPECIFIED
Doressoundiram, A.LESIA, Observatoire de Paris, Paris, FranceUNSPECIFIED
Barraud, O.LESIA, Observatoire de Paris, Paris, FranceUNSPECIFIED
Griton, L.LESIA, Observatoire de Paris, Paris, FranceUNSPECIFIED
Cornet, T.Aurora Technology BV for ESA, European Space Agency, Madrid, SpainUNSPECIFIED
Muñoz, C.Aurora Technology BV for ESA, European Space Agency, Madrid, SpainUNSPECIFIED
Varatharajan, IndhuIndhu.Varatharajan (at) dlr.deUNSPECIFIED
Helbert, JörnJoern.Helbert (at) dlr.dehttps://orcid.org/0000-0001-5346-9505
Date:May 2020
Journal or Publication Title:JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:125
DOI :10.1029/2018JE005879
Page Range:e05879
Publisher:Wiley
ISSN:2169-9097
Status:Published
Keywords:Mercury, spectroscopy, volcanism, MESSENGER, MASCS
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: Varatharajan, Indhu
Deposited On:04 Dec 2020 08:08
Last Modified:19 Nov 2021 20:31

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