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Major Volatiles Evolved From Eolian Materials in Gale Crater
Author(s) -
Stern Jennifer C.,
Sutter Brad,
Archer P. Douglas,
Eigenbrode Jennifer L.,
McAdam Amy C.,
Franz Heather B.,
Knudson Christine,
Ming Douglas W.,
Wong Gregory,
Freissinet Caroline,
Malespin Charles A.,
NavarroGonzalez Rafael,
Szopa Cyril,
Mahaffy Paul R.
Publication year - 2018
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2018gl079059
Subject(s) - aeolian processes , impact crater , geology , mars exploration program , sedimentary rock , carbonate , geochemistry , sulfate , nitrate , mineralogy , astrobiology , geomorphology , chemistry , physics , organic chemistry
The Sample Analysis at Mars 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 CO 2 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.