Major volatiles evolved from eolian materials in Gale crater

Jennifer Stern 1 Brad Sutter 2 P. Douglas Archer 2, 3 Jennifer Eigenbrode 1 Amy Mcadam 1 Heather Franz 1 Christine Knudson 1, 4 Douglas Ming 2 Gregory Wong 5 Caroline Freissinet 6 Charles Malespin 1 Rafael Navarro-González 7 Cyril Szopa 6 Paul Mahaffy 1
1 GSFC - NASA Goddard Space Flight Center
2 JSC - NASA Johnson Space Center
3 Jacobs Technology ESCG
4 CRESST - Center for Research and Exploration in Space Science and Technology [GSFC]
5 Penn State - Pennsylvania State University
6 IMPEC - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
7 Instituto de Ciencias Nucleares [Mexico]
Abstract : The Sample Analysis at Mars (SAM) on the Curiosity rover analyzed the major volatile content of four eolian samples at three locations in Gale crater. The Rocknest sample was taken from an inactive sand shadow with a significant component of dust‐sized grains, while Gobabeb and Ogunquit Beach samples were taken from different locations in the Bagnold Dune field and had dust‐free, fine sand sized grains. All eolian samples possessed more oxychlorine, carbon, and nitrate relative to sedimentary materials in Gale crater. Evolved CO2 above 450°C was consistent with ~0.7 and ~0.4 wt. % carbonate in the Bagnold Dunes and Rocknest materials, respectively, with a regional source inside Gale crater. The fine‐grained phase of Rocknest was enriched in adsorbed water and perhaps in Fe sulfate and Fe nitrate/nitrite compared to coarser Bagnold materials, and was estimated to contain up to ~0.1 wt. % of organic carbon.
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Submitted on : Tuesday, September 18, 2018 - 4:38:00 PM
Last modification on : Friday, January 10, 2020 - 3:42:35 PM

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Jennifer Stern, Brad Sutter, P. Douglas Archer, Jennifer Eigenbrode, Amy Mcadam, et al.. Major volatiles evolved from eolian materials in Gale crater. Geophysical Research Letters, American Geophysical Union, 2018, 45 (19), pp.10,240-10,248. ⟨10.1029/2018GL079059⟩. ⟨insu-01876721⟩

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