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Amazonian-aged fluvial system and associated ice-related features in Terra Cimmeria, Mars

Adeli, Solmaz and Hauber, Ernst and Kleinhans, Maarten and Le Deit, Laetitia and Platz, Thomas and Fawdon, Peter and Jaumann, Ralf (2016) Amazonian-aged fluvial system and associated ice-related features in Terra Cimmeria, Mars. Icarus, pp. 286-299. Elsevier. DOI: 10.1016/j.icarus.2016.05.020 ISSN 0019-1035

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Official URL: http://www.sciencedirect.com/science/article/pii/S0019103516301786

Abstract

The Martian climate throughout the Amazonian is widely believed to have been cold and hyper-arid, very similar to the current conditions. However, ubiquitous evidence of aqueous and glacial activity has been recently reported, including channels that can be tens to hundreds of kilometres long, alluvial and fluvial deposits, ice-rich mantles, and glacial and periglacial landforms. Here we study a ∼340 km-long fluvial system located in the Terra Cimmeria region, in the southern mid-latitudes of Mars. The fluvial system is composed of an upstream catchment system with narrow glaciofluvial valleys and remnants of ice-rich deposits. We observe depositional features including fan-shaped deposits, and erosional features such as scour marks and streamlined islands. At the downstream section of this fluvial system is an outflow channel named Kārūn Valles, which displays a unique braided alluvial fan and terminates on the floor of the Ariadnes Colles basin. Our observations point to surface runoff of ice/snow melt as the water source for this fluvial activity. According to our crater size–frequency distribution analysis the entire fluvial system formed during early to middle Amazonian, between View the MathML source Ga to View the MathML source Ma. Hydraulic modelling indicates that the Kārūn Valles and consequently the alluvial fan formation took place in geologically short-term event(s). We conclude that liquid water was present in Terra Cimmeria during the early to middle Amazonian, and that Mars during that time may have undergone several episodic glacial-related events.

Item URL in elib:https://elib.dlr.de/104445/
Document Type:Article
Title:Amazonian-aged fluvial system and associated ice-related features in Terra Cimmeria, Mars
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Adeli, Solmazsolmaz.adeli (at) dlr.dehttps://orcid.org/0000-0001-9972-409X
Hauber, Ernsternst.hauber (at) dlr.deUNSPECIFIED
Kleinhans, MaartenFaculty of Geosciences, Department of Physical Geography, Utrecht UniversityUNSPECIFIED
Le Deit, LaetitiaUniversité de NantesUNSPECIFIED
Platz, ThomasMax Planck Institut für SonnensystemforschungUNSPECIFIED
Fawdon, PeterOpen University, Milton Keynes, UKUNSPECIFIED
Jaumann, Ralfralf.jaumann (at) dlr.deUNSPECIFIED
Date:October 2016
Journal or Publication Title:Icarus
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.icarus.2016.05.020
Page Range:pp. 286-299
Publisher:Elsevier
ISSN:0019-1035
Status:Published
Keywords:Mars; Surface; Climate; Ices
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt MARS-EXPRESS / HRSC
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Adeli, Solmaz
Deposited On:28 Jun 2016 10:59
Last Modified:10 Jan 2019 15:54

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