GSTDTAP  > 地球科学
DOI10.1038/s41561-017-0012-5
Granular flows at recurring slope lineae on Mars indicate a limited role for liquid water
Dundas, Colin M.1; McEwen, Alfred S.2; Chojnacki, Matthew2; Milazzo, Moses P.1; Byrne, Shane2; McElwaine, Jim N.3,4; Urso, Anna2
2017-12-01
发表期刊NATURE GEOSCIENCE
ISSN1752-0894
EISSN1752-0908
出版年2017
卷号10期号:12
文章类型Article
语种英语
国家USA; England
英文摘要

Recent liquid water flow on Mars has been proposed based on geomorphological features, such as gullies. Recurring slope lineae - seasonal flows that are darker than their surroundings - are candidate locations for seeping liquid water on Mars today, but their formation mechanism remains unclear. Topographical analysis shows that the terminal slopes of recurring slope lineae match the stopping angle for granular flows of cohesionless sand in active Martian aeolian dunes. In Eos Chasma, linea lengths vary widely and are longer where there are more extensive angle-of-repose slopes, inconsistent with models for water sources. These observations suggest that recurring slope lineae are granular flows. The preference for warm seasons and the detection of hydrated salts are consistent with some role for water in their initiation. However, liquid water volumes may be small or zero, alleviating planetary protection concerns about habitable environments.


领域地球科学 ; 气候变化
收录类别SCI-E
WOS记录号WOS:000416858000010
WOS关键词SEASONAL FLOWS ; SURFACE ; RSL ; PERCHLORATE ; BRINES ; DELIQUESCENCE ; CONSTRAINTS ; SUBSURFACE ; ICE
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
被引频次:91[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/34782
专题地球科学
气候变化
作者单位1.US Geol Survey, Astrogeol Sci Ctr, Flagstaff, AZ 86001 USA;
2.Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA;
3.Univ Durham, Dept Earth Sci, Durham, England;
4.Planetary Sci Inst, Tucson, AZ USA
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GB/T 7714
Dundas, Colin M.,McEwen, Alfred S.,Chojnacki, Matthew,et al. Granular flows at recurring slope lineae on Mars indicate a limited role for liquid water[J]. NATURE GEOSCIENCE,2017,10(12).
APA Dundas, Colin M..,McEwen, Alfred S..,Chojnacki, Matthew.,Milazzo, Moses P..,Byrne, Shane.,...&Urso, Anna.(2017).Granular flows at recurring slope lineae on Mars indicate a limited role for liquid water.NATURE GEOSCIENCE,10(12).
MLA Dundas, Colin M.,et al."Granular flows at recurring slope lineae on Mars indicate a limited role for liquid water".NATURE GEOSCIENCE 10.12(2017).
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