| Title: |
Regolith weathering through heating samples under reducing conditions for Phobos surface studies |
| Authors: |
Lasue, Jérémie; Pinet, Patrick; Toplis, Michael, J.; Beck, Pierre; Cao, Loise; Munsch, Pascal |
| Contributors: |
Institut de recherche en astrophysique et planétologie (IRAP); Université Toulouse III - Paul Sabatier (UT3); Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS); Institut de Planétologie et d'Astrophysique de Grenoble (IPAG); Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (Fédération OSUG)-Université Grenoble Alpes (UGA) |
| Source: |
European Planetary Science Congress 2021 ; https://hal.science/hal-03443045 ; European Planetary Science Congress 2021, Sep 2021, Online, France |
| Publisher Information: |
CCSD |
| Publication Year: |
2021 |
| Collection: |
Université Toulouse III - Paul Sabatier: HAL-UPS |
| Subject Terms: |
[SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] |
| Subject Geographic: |
Online; France |
| Description: |
International audience ; Atmosphereless bodies of the Solar System present surface evolution under the harsh conditions of space weathering. Their regolith are exposed to thermal cycling, cosmic and solar rays irradiation, solar wind sputtering and micrometeorites bombardment and vaporization. With time these materials accumulate optically active opaque particles such as nanophase metallic iron particles on the surface or rims of dust grainsor larger iron particles. The density increase in iron particles modifies the spectral properties of the material with a lowering of the particlesalbedo, and of the absorption bands amplitude generally associated with a global reddening of the spectral slope [1, 2].Previous studies have shown that nanophase iron particles inducing weathering spectral properties will accumulate at the surface of olivine and pyroxene minerals under heating conditions simulating micrometeorite impacts [3]. The skin depth of weathered material depends on theweathering process and minerals.Laboratory simulations by heating samples under reducing conditions can recreate the conditions under which regolith may be weathered inspace with surface alteration of grains and apparition of nanophase iron on the altered depth. The effect of the changes on the grain spectralproperties depending on the experimental conditions will be further studied for applications to airless bodies in the Solar System. The sampleswill be analyzed with SEM at IRAP and their reflectance spectra acquired with the SHADOWS instrument at IPAG [12] for future comparisonswith the spectra of Phobos and Deimos. |
| Document Type: |
conference object |
| Language: |
English |
| Availability: |
https://hal.science/hal-03443045; https://hal.science/hal-03443045v1/document; https://hal.science/hal-03443045v1/file/EPSC2021-172-print-1.pdf |
| Rights: |
info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.B4B47B2B |
| Database: |
BASE |