Regolith of the Crater Floor Units, Jezero Crater, Mars: Textures, Composition, and Implications for Provenance - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue Journal of Geophysical Research. Planets Année : 2023

Regolith of the Crater Floor Units, Jezero Crater, Mars: Textures, Composition, and Implications for Provenance

Alicia Vaughan
  • Fonction : Auteur
Michelle E. Minitti
  • Fonction : Auteur
Emily L. Cardarelli
  • Fonction : Auteur
Jeffrey R. Johnson
  • Fonction : Auteur
Linda C. Kah
  • Fonction : Auteur
Melissa S. Rice
  • Fonction : Auteur
Mark Sephton
  • Fonction : Auteur
Briony H. N. Horgan
  • Fonction : Auteur
Roger C. Wiens
  • Fonction : Auteur
R. Aileen Yingst
  • Fonction : Auteur
Maria-Paz Zorzano Mier
  • Fonction : Auteur
Ryan Anderson
  • Fonction : Auteur
James F. Bell
  • Fonction : Auteur
Adrian J. Brown
  • Fonction : Auteur
Edward A. Cloutis
  • Fonction : Auteur
Kenneth E. Herkenhoff
  • Fonction : Auteur
Elisabeth M. Hausrath
  • Fonction : Auteur
Alexander G. Hayes
  • Fonction : Auteur
Kjartan Kinch
  • Fonction : Auteur
Marco Merusi
  • Fonction : Auteur
Chase C. Million
  • Fonction : Auteur
Robert Sullivan
  • Fonction : Auteur
Sandra M. Siljeström
  • Fonction : Auteur
Michael St. Clair
  • Fonction : Auteur

Résumé

A multi-instrument study of the regolith of Jezero crater floor units by the Perseverance rover has identified three types of regolith: fine-grained, coarse-grained, and mixed-type. Mastcam-Z, Wide Angle Topographic Sensor for Operations and eNgineering, and SuperCam Remote Micro Imager were used to characterize the regolith texture, particle size, and roundedness where possible. Mastcam-Z multispectral and SuperCam laser-induced breakdown spectroscopy data were used to constrain the composition of the regolith types. Fine-grained regolith is found surrounding bedrock and boulders, comprising bedforms, and accumulating on top of rocks in erosional depressions. Spectral and chemical data show it is compositionally consistent with pyroxene and a ferric-oxide phase. Coarse-grained regolith consists of 1-2 mm well-sorted gray grains that are found concentrated around the base of boulders and bedrock, and armoring bedforms. Its chemistry and spectra indicate it is olivine-bearing, and its spatial distribution and roundedness indicate it has been transported, likely by saltation-induced creep. Coarse grains share similarities with the olivine grains observed in the Séítah formation bedrock, making that unit a possible source for these grains. Mixed-type regolith contains fine- and coarse-grained regolith components and larger rock fragments. The rock fragments are texturally and spectrally similar to bedrock within the Máaz and Séítah formations, indicating origins by erosion from those units, although they could also be a lag deposit from erosion of an overlying unit. The fine- and coarse-grained types are compared to their counterparts at other landing sites to inform global, regional, and local inputs to regolith formation within Jezero crater. The regolith characterization presented here informs the regolith sampling efforts underway by Perseverance.
Fichier principal
Vignette du fichier
JGR Planets - 2023 - Vaughan - Regolith of the Crater Floor Units Jezero Crater Mars Textures Composition and.pdf (6.19 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte
Licence

Dates et versions

insu-04473210 , version 1 (23-02-2024)

Licence

Identifiants

Citer

Alicia Vaughan, Michelle E. Minitti, Emily L. Cardarelli, Jeffrey R. Johnson, Linda C. Kah, et al.. Regolith of the Crater Floor Units, Jezero Crater, Mars: Textures, Composition, and Implications for Provenance. Journal of Geophysical Research. Planets, 2023, 128, ⟨10.1029/2022JE007437⟩. ⟨insu-04473210⟩
23 Consultations
8 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More