DOI: 10.1029/2018JE005540
Scopus记录号: 2-s2.0-85052464207
论文题名: The Effect of Mars-Relevant Soil Analogs on the Water Uptake of Magnesium Perchlorate and Implications for the Near-Surface of Mars
作者: Primm K.M. ; Gough R.V. ; Wong J. ; Rivera-Valentin E.G. ; Martinez G.M. ; Hogancamp J.V. ; Archer P.D. ; Ming D.W. ; Tolbert M.A.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期: 8 起始页码: 2076
结束页码: 2088
语种: 英语
英文关键词: deliquescence
; Mars
; MSL
; perchlorate
; perchlorate and mineral mixtures
; Phoenix
英文摘要: The water uptake and release by perchlorate salts have been well studied since the first in situ identification of such salts in the Martian soil by the Phoenix mission in 2008. However, there have been few studies on the effect of the insoluble regolith minerals on the interaction of perchlorate with water vapor. In this work, we investigate the impact of a Mars-relevant mineral, montmorillonite, and a Mars soil analog, Mojave Mars Simulant (MMS), on the deliquescence (transition from dry crystalline to aqueous via water vapor absorption), ice formation, and efflorescence (transition from aqueous to dry crystalline via loss of water) of pure magnesium perchlorate. We studied mixtures of magnesium perchlorate hexahydrate with either montmorillonite or MMS. Although montmorillonite and MMS are materials that may serve as nuclei for either ice nucleation or salt efflorescence, we find that these soil analogs did not affect the phase transitions of magnesium perchlorate. The salt-mineral mixture behaved similarly, within estimated uncertainties, to pure magnesium perchlorate in all cases. Experiments were performed in both N2 and CO2 atmospheres, with no detectable difference. We use data from the Mars Science Laboratory Rover Environmental Monitoring Station instrument and the Phoenix Thermal and Electrical Conductivity Probe, as well as modeling of the shallow subsurface, to determine the likelihood of these perchlorate phase transitions occurring at Gale Crater and the northern arctic plains (Vastitas Borealis). We find that aqueous solutions are predicted in the shallow subsurface of the Phoenix landing site, but not predicted at Gale Crater. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113305
Appears in Collections: 气候减缓与适应
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作者单位: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States; Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, United States; Lunar and Planetary Institute, Universities Space Research Association, Houston, TX, United States; Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United States; Jacobs at NASA Johnson Space Center, Houston, TX, United States
Recommended Citation:
Primm K.M.,Gough R.V.,Wong J.,et al. The Effect of Mars-Relevant Soil Analogs on the Water Uptake of Magnesium Perchlorate and Implications for the Near-Surface of Mars[J]. Journal of Geophysical Research: Planets,2018-01-01,123(8)