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Title: In situ measurement of atmospheric krypton and xenon on Mars with Mars Science Laboratory

Journal Article · · Earth and Planetary Science Letters
 [1];  [2];  [3];  [4];  [1]; ORCiD logo [5];  [6];  [1];  [7];  [8];  [9];  [1];  [10];  [6];  [1]
  1. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States). Solar System Exploration Division
  2. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States). Solar System Exploration Division; Universities Space Research Association (USRA), Columbia, MD (United States)
  3. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States). Solar System Exploration Division; Center for Space Sciences and Technology (CRESST), Greenbelt, MD (United States)
  4. Univ. of Minnesota, Minneapolis, MN (United States)
  5. Open Univ., Milton Keynes (United Kingdom). Dept. of Environment, Earth and Ecosystems
  6. Univ. of Michigan, Ann Arbor, MI (United States). Climate and Space Sciences and Engineering
  7. NASA Johnson Space Center, Houston, TX (United States)
  8. Concordia Univ., Moorhead, MN (United States)
  9. Univ. of Hawaii, Honolulu, HI (United States)
  10. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Mars Science Laboratory's Sample Analysis at Mars (SAM) investigation has measured all of the stable isotopes of the heavy noble gases krypton and xenon in the martian atmosphere, in situ, from the Curiosity Rover at Gale Crater, Mars. Previous knowledge of martian atmospheric krypton and xenon isotope ratios has been based upon a combination of the Viking mission's krypton and xenon detections and measurements of noble gas isotope ratios in martian meteorites. But, the meteorite measurements reveal an impure mixture of atmospheric, mantle, and spallation contributions. The xenon and krypton isotopic measurements reported here include the complete set of stable isotopes, unmeasured by Viking. Our new results generally agree with Mars meteorite measurements but also provide a unique opportunity to identify various non-atmospheric heavy noble gas components in the meteorites. Kr isotopic measurements define a solar-like atmospheric composition, but deviating from the solar wind pattern at 80Kr and 82Kr in a manner consistent with contributions originating from neutron capture in Br. The Xe measurements suggest an intriguing possibility that isotopes lighter than 132Xe have been enriched to varying degrees by spallation and neutron capture products degassed to the atmosphere from the regolith, and a model is constructed to explore this possibility. Such a spallation component, but, is not apparent in atmospheric Xe trapped in the glassy phases of martian meteorites.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
National Aeronautics and Space Administration (NASA)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1417813
Report Number(s):
LA-UR-17-27690
Journal Information:
Earth and Planetary Science Letters, Vol. 454, Issue C; ISSN 0012-821X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Cited By (6)

High-precision measurements of krypton and xenon isotopes with a new static-mode quadrupole ion trap mass spectrometer journal January 2019
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
Lunar Xenon and the Origin of the Indigenous Component journal September 2019
Origin and evolution of the atmospheres of early Venus, Earth and Mars journal May 2018
The potential science and engineering value of samples delivered to Earth by Mars sample return journal March 2019
The potential science and engineering value of samples delivered to Earth by Mars sample return text January 2019