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Title: Hydration state of calcium sulfates in Gale crater, Mars: Identification of bassanite veins

Journal Article · · Earth and Planetary Science Letters
 [1];  [1];  [1];  [2];  [3];  [3];  [4];  [1];  [1]; ORCiD logo [5];  [6];  [1];  [7];  [1];  [8];  [9]
  1. Univ. of Toulouse (France). Midi-Pyrenees Observatory (OMP); National Centre for Scientific Research (CNRS), Toulouse (France). Inst. for Research in Astrophysics and Planetology (IRAP)
  2. Planetary Science Inst., Tucson, AZ (United States)
  3. National Centre for Scientific Research (CNRS), Nantes (France). Lab. of Planetology and Geodynamics
  4. National Centre for Scientific Research (CNRS), Toulouse (France). Inst. for Research in Astrophysics and Planetology (IRAP)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  6. Univ. of Michigan, Ann Arbor, MI (United States)
  7. Museum of Natural History, Paris (France). Lab. of Mineralogy & Cosmochemistry of the Museum (LMCM)
  8. NASA Johnson Space Center, Houston, TX (United States). Aerodyne Industries
  9. NASA Johnson Space Center, Houston, TX (United States)

In-situ analyses reveal the presence of hydrogen within calcium sulfate veins crosscutting the sediments found in Gale crater. Laboratory experiments were performed to calibrate the hydrogen signal measured by laser induced breakdown spectroscopy (LIBS) in a range applicable to martian data. The analyses indicate that all veins targeted so far at Gale consist predominantly of bassanite which most likely formed by dehydration of gypsum. This scenario thus suggests that the percolating water produced gypsum, possibly by hydration of anhydrite in aqueous solution, and remained at temperatures below ~60 °C at that time. Desiccating conditions followed, consistent with a hyperarid climate and favored by burial or impacts. In addition, anhydrite with lesser bassanite has been found by XRD in samples of sediments hosting the veins. Our result suggests bassanite is likely found in the veins and anhydrite may be more common as a fine-grained component within the sediments.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
National Aeronautics and Space Administration (NASA)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1417814
Report Number(s):
LA-UR-17-27695
Journal Information:
Earth and Planetary Science Letters, Vol. 452, Issue C; ISSN 0012-821X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 97 works
Citation information provided by
Web of Science

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An interval of high salinity in ancient Gale crater lake on Mars journal October 2019
Four-metal-element quantitative analysis and pollution source discrimination in atmospheric sedimentation by laser-induced breakdown spectroscopy (LIBS) coupled with machine learning journal January 2020
Syndepositional precipitation of calcium sulfate in Gale Crater, Mars journal September 2018
Plasma Spectroscopy of Various Types of Gypsum: An Ideal Terrestrial Analogue journal July 2019
Characterization of LIBS emission lines for the identification of chlorides, carbonates, and sulfates in salt/basalt mixtures for the application to MSL ChemCam data: LIBS OF CL, C, S IN SALT-BASALT MIXTURES journal April 2017
The potential science and engineering value of samples delivered to Earth by Mars sample return: International MSR Objectives and Samples Team (iMOST) journal March 2019
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The potential science and engineering value of samples delivered to Earth by Mars sample return journal March 2019
Plasma Spectroscopy of Various Types of Gypsum: An ideal Terrestrial Analogue preprint July 2019
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