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Decameter thick remnant glacial ice deposits on Mars

Conway, Susan J. and Balme, Matthew R. (2014). Decameter thick remnant glacial ice deposits on Mars. Geophysical Research Letters, 41(15) pp. 5402–5409.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1002/2014GL060314
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Abstract

On Mars, a smooth, draping unit—the “latitude-dependant mantle” (LDM), believed to comprise meter thick layers of dust and ice—extends from the midlatitudes to the poles, covering at least 23% of the surface. We show that the LDM can be 30 m deep on pole-facing crater walls, and by measuring the erosional and depositional volumes of small gullies that incise these LDM deposits, we show that it must contain between 46% and 95% ice by volume. Extrapolating to a global scale, these deposits account for ~104 km3 of near-surface ice, doubling previous LDM volume estimates. Thick LDM deposits can be emplaced during the many orbital variation-driven climate excursions that occurred during the Amazonian period. We suggest that LDM deposits are similar to ice sheets composed of massive ice with a surface lag.

Item Type: Journal Item
Copyright Holders: 2014. American Geophysical Union
ISSN: 1944-8007
Project Funding Details:
Funded Project NameProject IDFunding Body
Wet, moist, or dry? Using digital terrain models to determine the amount of water that has shaped the surfaces of Earth, Mars and the MoonRPG-397Leverhulme Trust
Keywords: Mars; latitude-dependant mantle; gullies; glacier; ground ice
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 40699
Depositing User: Susan Conway
Date Deposited: 12 Aug 2014 08:35
Last Modified: 25 Jun 2019 06:01
URI: http://oro.open.ac.uk/id/eprint/40699
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