DOI: 10.1002/2014GL061136
论文题名: Sulfates hydrating bulk soil in the Martian low and middle latitudes
作者: Karunatillake S. ; Wray J.J. ; Gasnault O. ; McLennan S.M. ; Rogers A.D. ; Squyres S.W. ; Boynton W.V. ; Skok J.R. ; Ojha L. ; Olsen N.
刊名: Geophysical Research Letters
ISSN: 0094-9579
EISSN: 1944-9310
出版年: 2014
卷: 41, 期: 22 起始页码: 7987
结束页码: 7996
语种: 英语
英文关键词: gamma ray spectrometer
; hydrous sulfate
; Mars soil
; Mars soil hydration
; Mars southern bulk soil
; Paso Robles Mars
Scopus关键词: Calcium
; Gamma ray spectrometers
; Gamma rays
; Hydrates
; Hydration
; Mixtures
; Silicates
; Soils
; Spectrometers
; Amorphous phasis
; Aqueous process
; Bearing strata
; Bulk soils
; Hydrous sulfates
; Paso Robles Mars
; Southern Hemisphere
; Visible/near-infrared spectroscopies
; Sulfur compounds
; data set
; latitude
; Martian atmosphere
; mineral deposit
; soil type
; Southern Hemisphere
; sulfate
; Amazonia
英文摘要: The evidence for sulfate-bearing strata, across Late-Noachian to Amazonian eons, suggests a central role for sulfates in acidity and salinity of Martian paleofluids and the planet's habitability. However, details remain unclear owing to shallow sampling and the limited ability of visible/near-infrared spectroscopy to distinguish among some sulfates. Using chemical data from the Mars Odyssey gamma ray spectrometer, including the sulfur map of Mars, we confirm the possibility of hydrous sulfates acting as key hydrates throughout the southern midlatitudinal soil at decimeter depths. An H2 O:S molar ratio between 2.4 and 4.0 for 80% of the midlatitudes is also consistent with hydrous sulfate phases, including the many Fe sulfates hydrated in this range or mixtures of Ca and Mg sulfates. Nevertheless, hydrous Fe sulfates could explain our observations in a simpler manner relative to Ca/Mg mixtures. Furthermore, phyllosilicates, zeolites, amorphous phases, and H2 O(s) do not seem to be strong candidates to explain the H-S variations. Consequently, we speculate that sulfates, as the primary contributor of H2 O in bulk soil, may influence modern aqueous processes including warm-season slope lineae in the southern hemisphere. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923324651&doi=10.1002%2f2014GL061136&partnerID=40&md5=a7414258a1f0dcef5762199dfed77c7a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6843
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geology and Geophysics, Louisiana State University, Baton Rouge, LA, United States
Recommended Citation:
Karunatillake S.,Wray J.J.,Gasnault O.,et al. Sulfates hydrating bulk soil in the Martian low and middle latitudes[J]. Geophysical Research Letters,2014-01-01,41(22).