DOI: 10.1029/2017JE005508
Scopus记录号: 2-s2.0-85051252284
论文题名: The Nature and Origin of Deposits in Uzboi Vallis on Mars
作者: Wilson S.A. ; Grant J.A. ; Howard A.D. ; Buczkowski D.L.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期: 7 起始页码: 1842
结束页码: 1862
语种: 英语
英文关键词: alluvial fan
; geomorphology
; Hesperian
; Mars
; paleolake
Scopus关键词: Hesperia
英文摘要: Uzboi Vallis in northwestern Noachis Terra is the uppermost segment of the Noachian to Hesperian Uzboi-Ladon-Morava mesoscale outflow system that dominates regional northward drainage through Noachis and Margaritifer Terrae. Recently acquired High Resolution Imaging Science Experiment (HiRISE) and Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) data, as well as topography, help to characterize the nature and origin of a previously unrecognized deposit on the floor of Uzboi Vallis at the confluence of Nirgal Vallis. The Uzboi floor deposit consists of a lower unit (~255 km3) and an upper unit (~34 km3). The origin and age of the lower unit are less constrained; it may have formed by a combination of impact (e.g., ejecta from Luki crater), fluvial/alluvial, and (or) mass wasting processes. The superimposed upper unit is symmetrical relative to the mouth of Nirgal, fan-shaped in planform and layered. The morphology and location of the upper unit are consistent with alluvial (and possibly debris flow) deposition related to discharge from Nirgal Vallis. Crater Luki and the upper unit likely postdate the draining of the short-lived lake in Uzboi that formed after the mid- to Late Hesperian Holden crater blocked the northern end of Uzboi. Late-stage aqueous activity from Nirgal may have been sustained to some extent by groundwater discharge from aquifers along Nirgal that were recharged when Uzboi hosted a lake and (or) somewhat limited precipitation-fed surface runoff. The associated climate in the mid- to Late Hesperian was favorable for such aqueous processes, and it may have provided habitable surface conditions in this region relatively late in Martian history. ©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/113638
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, Washington, DC, United States; Department of Environmental Sciences, University of Virginia, Charlottesville, VA, United States; Applied Physics Lab, Johns Hopkins University, Laurel, MD, United States
Recommended Citation:
Wilson S.A.,Grant J.A.,Howard A.D.,et al. The Nature and Origin of Deposits in Uzboi Vallis on Mars[J]. Journal of Geophysical Research: Planets,2018-01-01,123(7)