POSSIBLE (VALLEY/CHANNEL) PINGOS & "WET-BASED" PERIGLACIATION AT THE MARS

International audience Introduction: Mounds that exhibit similarities of shape, scale, features, and spatially-associated landforms with terrestrial pingos (perennially ice-cored mounds) [e.g. 1-2] (Fig. 1) have been observed at the mid-latitudes of Utopia Planitia [3-7] and the Argyre region [8], a...

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Bibliographic Details
Main Authors: Soare, R. J., Conway, S, Williams, J. P., El Maarry, R. M., Di Achille, G.
Other Authors: Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG), Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
Format: Conference Object
Language:English
Published: HAL CCSD 2020
Subjects:
[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology
Ice
open system Pingo
permafrost
Online Access:https://hal.archives-ouvertes.fr/hal-03091535
https://hal.archives-ouvertes.fr/hal-03091535/document
https://hal.archives-ouvertes.fr/hal-03091535/file/1074.pdf
Description
Summary:International audience Introduction: Mounds that exhibit similarities of shape, scale, features, and spatially-associated landforms with terrestrial pingos (perennially ice-cored mounds) [e.g. 1-2] (Fig. 1) have been observed at the mid-latitudes of Utopia Planitia [3-7] and the Argyre region [8], as well as the near-equatorial latitude of Athabasca Vallis [9-10]. Pingo formation on Earth largely follows one of two pathways: a) the precursive pooling of surface or near-surface water, its freeze-thaw cycling and permafrost aggradation (hydrostatic/closed-system pingos [CSPs]); or, b) groundwater migration driven or facilitated by topography, geological faulting or artesian pressure (hydraulic/open-system pingo [OSPs]) [1-2].

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