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Groundwater processes in Hebes Chasma, Mars

Grindrod, PM; Balme, MR; (2010) Groundwater processes in Hebes Chasma, Mars. Geophysical Research Letters , 37 , Article L13202. 10.1029/2010GL044122. Green open access

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Abstract

We describe a conceptual model of groundwater processes at Hebes Chasma, Mars, which can account for the distribution of hydrated minerals and their subsequent evolution. At Hebes Chasma, pressure gradients set up by the large central mound, Hebes Mensa, could cause groundwater to be sourced predominantly from beneath the central region, if such water were present. Evaporation of upwelling groundwater would cause monohydrates to form at or near the surface through efflorescence, and polyhydrates to form inside the central mound through subflorescence. This crystallization could lead to an excess pore pressure, causing large-scale weakening and subsequent collapse that can reveal the interior polyhydrated deposits. If evaporation is high compared to groundwater inflow, then increased crystallization would promote the formation of collapse zones. If evaporation is low compared to groundwater inflow then there would be a greater chance for water reaching the surface and the possible formation of karst landforms. Citation: Grindrod, P. M., and M. R. Balme (2010), Groundwater processes in Hebes Chasma, Mars, Geophys. Res. Lett., 37, L13202, doi: 10.1029/2010GL044122.

Type: Article
Title: Groundwater processes in Hebes Chasma, Mars
Open access status: An open access version is available from UCL Discovery
DOI: 10.1029/2010GL044122
Publisher version: http://dx.doi.org/10.1029/2010GL044122
Language: English
Additional information: Copyright 2010 by the American Geophysical Union
Keywords: Valles Marineris, Meridiani Planum, Porous materials, Salt tectonics, Crystallization, Stress, Generation, Landslides
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/116245
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