DOI: 10.1002/2013GL057893
论文题名: Spectral constraints on the formation mechanism of recurring slope lineae
作者: Ojha L. ; Wray J.J. ; Murchie S.L. ; McEwen A.S. ; Wolff M.J. ; Karunatillake S.
刊名: Geophysical Research Letters
ISSN: 0094-8419
EISSN: 1944-8150
出版年: 2013
卷: 40, 期: 21 起始页码: 5621
结束页码: 5626
语种: 英语
英文关键词: composition
; Mars
; remote sensing
; spectral analysis
; surface materials and properties
Scopus关键词: Compact reconnaissance
; Formation mechanism
; Formation temperature
; Imaging spectrometers
; Mars
; Spectral characteristics
; Spectral constraints
; Surface materials
; Chemical analysis
; Remote sensing
; Spectrum analysis
; Wetting
; Materials properties
; altitude
; Mars
; mineral
; oxide
; remote sensing
; seasonality
; slope
; spectral analysis
; temperature effect
; wetting
英文摘要: Recurring slope lineae (RSL) exhibit multiple lines of evidence for a wet origin. In the southern midlatitudes, they form on steep, equator-facing slopes that are warm during southern summer. The formation temperature, seasonality, and other geomorphic characteristics are suggestive of water-related formation, perhaps dense brines. We examined Compact Reconnaissance Imaging Spectrometer for Mars images of all confirmed RSL sites from the southern midlatitudes and the equatorial region to understand the composition of RSL and/or RSL-associated deposits. We did not detect any spectral signature attributable to water; however, a distinct and consistent spectral signature is observed at most sites, indicating enhanced abundances or distinct grain sizes of both ferric and ferrous minerals in RSL-related materials compared to adjacent non-RSL slopes. Like the RSL themselves, the strength of these signatures varies as a function of season. The observed spectral changes may indicate removal of a fine-grained surface component during RSL flow, precipitation of ferric oxides, and/or wetting of the substrate. Key Points CRISM analysis of RSL Consistent and diagnostic spectral characteristics associated with RSL Spectral behavior consistent with wetting of the substrate ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887547647&doi=10.1002%2f2013GL057893&partnerID=40&md5=da12001342be168e606639379bb37f70
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5683
Appears in Collections: 气候减缓与适应
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作者单位: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, 311 Ferst Dr., Atlanta, GA 30332-0340, United States
Recommended Citation:
Ojha L.,Wray J.J.,Murchie S.L.,et al. Spectral constraints on the formation mechanism of recurring slope lineae[J]. Geophysical Research Letters,2013-01-01,40(21).