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Simulation of micrometeorite bombardment and its implications for regolith evolution in a Hermean context

Stoijc, A.N. and Weber, I. and Pavlov, Sergey and Morlok, A. and Hiesinger, H. and Schmedemann, N. and Reitze, M.P. and Bauch, Karin and Pasckert, J. H. and Maturilli, Alessandro and Helbert, Jörn (2022) Simulation of micrometeorite bombardment and its implications for regolith evolution in a Hermean context. 23rd International Mineralogical Association General Meeting, 2022-07-08 - 2022-07-12, Lyon, France.

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Abstract

Surficial regolith layers of atmosphere-free planetary surfaces are altered by a multitude of processes summarized as space weathering. Minerals comprising such altered surfaces can differ significantly (in terms of structure and resulting alteration products) from their terrestrial laboratory counterparts. These changes, when altered vs. unaltered materials are compared, can also be observed in the associated optical spectra (e.g., darkening and reddening in the near infrared range, and shifts, attenuation and broadening of characteristic bands in the mid infrared range). Understanding these changes is essential for interpreting optical remote sensing data. In order to better understand the damage imparted by micrometeorite bombardment into a planetary surface, we investigated the effects of vacuum ablation on powdered analog material with a ns-pulsed infrared laser and analyzed the run products with a Zeiss Libra transmission electron (TEM) microscope. We comminuted a single crystal of pure synthetic forsterite and pressed the powder (≤ 280 µm) into a pellet and irradiated it with the laser. The run products, e.g., ballistically relocated grains and melt sprinkles, were caught on TEM grids, which were positioned near the impact sites. Here, we report our findings on nanometer-sized modifications that were induced in the relocated grains, sputtered off plasma material and melt sprinkles that condensed on the TEM grid and discuss the implications of our results in the light of the Hermean surface.

Item URL in elib:https://elib.dlr.de/190380/
Document Type:Conference or Workshop Item (Speech)
Title:Simulation of micrometeorite bombardment and its implications for regolith evolution in a Hermean context
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Stoijc, A.N.Westfälische Wilhelms-Universität MünsterUNSPECIFIEDUNSPECIFIED
Weber, I.Institut für Planetologie, WWU Münster, GermanyUNSPECIFIEDUNSPECIFIED
Pavlov, SergeyUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Morlok, A.Institut für Planetologie, Westfälische Wilhelms‐Universität Münster, Münster, GermanyUNSPECIFIEDUNSPECIFIED
Hiesinger, H.Inst. für Planetologie, Westfälische Wilhelms-Universität, Münster, GermanyUNSPECIFIEDUNSPECIFIED
Schmedemann, N.Institute für Planetologie, Westfälische Wilhelms-Universität Münster, Münster, GermanyUNSPECIFIEDUNSPECIFIED
Reitze, M.P.Institut für Planetologie, Westfälische Wilhelms‐Universität Münster, Münster, GermanyUNSPECIFIEDUNSPECIFIED
Bauch, KarinInstitut für Planetologie, Westfälische Wilhelms‐Universität Münster, Münster, GermanyUNSPECIFIEDUNSPECIFIED
Pasckert, J. H.Institut für Planetologie, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Strasse 10, 48149 Münster, GermanyUNSPECIFIEDUNSPECIFIED
Maturilli, AlessandroUNSPECIFIEDhttps://orcid.org/0000-0003-4613-9799UNSPECIFIED
Helbert, JörnUNSPECIFIEDhttps://orcid.org/0000-0001-5346-9505UNSPECIFIED
Date:2022
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:space weathering, simulated micrometeoritic bombardement
Event Title:23rd International Mineralogical Association General Meeting
Event Location:Lyon, France
Event Type:international Conference
Event Start Date:8 July 2022
Event End Date:12 July 2022
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 Optical Sensor Systems > Terahertz and Laser Spectroscopy
Deposited By: Pavlov, Dr. Sergey
Deposited On:21 Nov 2022 13:06
Last Modified:24 Apr 2024 20:51

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