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  • Lunar and Planetary Science and Exploration  (2)
  • Lunar and Planetary Science and Exploration; Astronomy; Instrumentation and Photography  (1)
  • 2015-2019  (3)
  • 2015  (3)
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Keywords
  • Lunar and Planetary Science and Exploration  (2)
  • Lunar and Planetary Science and Exploration; Astronomy; Instrumentation and Photography  (1)
Years
  • 2015-2019  (3)
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  • 1
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    Oxychlorine Species on Mars: The Gale Crater Story (2015)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Comparing data from the Alpha- Particle X-Ray Spectrometer (APXS) and the Sample Analysis at Mars (SAM) instruments on MSL reveals a strong linear correlation between chlorine and oxygen, further demonstrating the presence of oxychlorine species in Gale Crater and, very likely, globally on Mars. Perchlorate was first discovered on Mars by the Microscopy, Electrochemistry, and Conductivity Analyzer (MECA) instrument on the Phoenix lander in 2008. Current hypotheses suggest that the formation of oxychlorine species such as perchlorate or chlorate is a global process and that these species should be globally distributed on Mars [e.g. 2-4]. To date, the SAM and Chemistry and Mineralogy (CheMin) instruments on MSL have analyzed one scooped sample of aeolian material (Rocknest [RN]), and four drilled samples (John Klein [JK], Cumberland [CB], Windjana [WJ], and Confidence Hills [CH]). The APXS instrument has also investigated the same or very similar samples. Although not definitively identified, oxychlorine species have been proposed to explain releases of O2, HCl, and chlorinated hydrocarbon species detected by evolved gas analysis (EGA) with the SAM instrument. We report a strong linear correlation between wt. % Cl detected by APXS and moles O2 detected by SAM during pyrolysis, indicating the presence of oxychlorine species in Gale Crater.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-CN-32849 , Lunar and Planetary Science Conference; Mar 16, 2015 - Mar 20, 2015; The Woodlands, TX; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Investigating the Origin and Evolution of Venus with In Situ Mass Spectrometry (2015)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Measurement of noble gas abundances on Venus remain a high priority for planetary science. These studies are only possible through in situ measurement, and can be accomplished by a modern neutral mass spectrometer (NMS) such as that developed at NASA Goddard, based on flight-proven technology. Here we show how the measurement of noble gases can be secured using demonstrated enrichment techniques.
    Keywords: Lunar and Planetary Science and Exploration; Astronomy; Instrumentation and Photography
    Type: GSFC-E-DAA-TN26211 , 2015 European Planetary Science Congress (EPSC); Sep 27, 2015 - Oct 02, 2015; Nantes; France
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Investigating the Origin and Evolution of Venus with In Situ Mass Spectrometry (2015)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The exploration of Venus continues to be a top priority of planetary science. The Planetary Decadal Survey goals for inner-planet exploration seek to discern the origin and diversity of terrestrial planets, understand how the evolution of terrestrial planets relates to the evolution of life, and explore the processes that control climate on Earth-like planets. These goals can only be realized through continued and extensive exploration of Venus, the most mysterious of the terrestrial planets, remarkably different from the Earth despite the gross similarities between these "twin planets". It is unknown if this apparent divergence was intrinsic, programmed during accretion from distinct nebular reservoirs, or a consequence of either measured or catastrophic processes during planetary evolution. Even if the atmosphere of Venus is a more "recent" development, its relationship to the resurfacing of the planet's enigmatic surface is not well understood. Resolving such uncertainties directly addresses the hypothesis of a more clement, possibly water-rich era in Venus' past as well as whether Earth could become more Venus-like in the future.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN21995 , Venus Exploration Analysis Group: Venus Science Priorities for Laboratory Measurements and Instrument Definition Workshop; Apr 07, 2015 - Apr 08, 2015; Hampton, VA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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