Sedimentary Organics in Glen Torridon, Gale Crater, Mars: Results from the SAM Instrument Suite and Supporting Laboratory Analyses - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Journal of Geophysical Research. Planets Year : 2022

Sedimentary Organics in Glen Torridon, Gale Crater, Mars: Results from the SAM Instrument Suite and Supporting Laboratory Analyses

Amy C Mcadam
Jennifer L. Eigenbrode
  • Function : Author
  • PersonId : 1032992
Caroline Freissinet
Daniel P. Glavin
  • Function : Author
  • PersonId : 946336
Cyril Szopa
Gregory M. Wong
Brad Sutter
  • Function : Author
  • PersonId : 1012776
Ophélie McIntosh
  • Function : Author
  • PersonId : 1163315
Jennifer C. Stern
  • Function : Author
  • PersonId : 1034249
Valerie Fox
  • Function : Author
  • PersonId : 1008569
Charles Malespin
  • Function : Author
  • PersonId : 1033678
Paul R. Mahaffy
  • Function : Author
  • PersonId : 924866

Abstract

The Sample Analysis at Mars (SAM) suite instrument on board NASA’s Curiosity rover has characterized the inorganic and organic chemical composition of seven samples from the Glen Torridon clay-bearing unit. A variety of organic molecules were detected with SAM using pyrolysis (up to ~850°C) and wet chemistry experiments coupled with evolved gas analysis (EGA) and gas chromatography-mass spectrometry (GCMS). SAM EGA and GCMS analyses revealed a greater diversity and abundance of sulfur-bearing aliphatic and aromatic organic compounds in the sediments of this Gale crater unit than earlier in the mission. We also report the detection of nitrogen-containing, oxygen-containing, and chlorine- containing molecules, as well as polycyclic aromatic hydrocarbons found in Glen Torridon (GT), although the sources of some of these organics may be related to the presence of chemical reagents in the SAM instrument background. However, sulfur-bearing organics released at high temperature (>600°C) are likely derived from martian sources (e.g., igneous, hydrothermal, atmospheric, or biological) or exogenous sources and consistent with the presence of recalcitrant organic materials in the sample. The SAM measurements of the GT clay-bearing unit expand the inventory of organic matter present in Gale crater and is also consistent with the hypothesis that clay minerals played an important role in the preservation of ancient refractory organic matter on Mars. These findings deepen our understanding of the past habitability and biological potential of Gale crater.
Fichier principal
Vignette du fichier
JGR Planets - 2022 - Millan - Sedimentary Organics in Glen Torridon Gale Crater Mars Results From the SAM Instrument.pdf (4.21 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

insu-03775640 , version 1 (12-09-2022)
insu-03775640 , version 2 (21-12-2022)
insu-03775640 , version 3 (23-12-2022)

Licence

Attribution - NonCommercial

Identifiers

Cite

Maeva Millan, Amy J. Williams, Amy C Mcadam, Jennifer L. Eigenbrode, Andrew Steele, et al.. Sedimentary Organics in Glen Torridon, Gale Crater, Mars: Results from the SAM Instrument Suite and Supporting Laboratory Analyses. Journal of Geophysical Research. Planets, 2022, 127 (11), pp.e2021JE007107. ⟨10.1029/2021je007107⟩. ⟨insu-03775640v3⟩
299 View
119 Download

Altmetric

Share

Gmail Facebook X LinkedIn More