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High-resolution investigations of Transverse Aeolian Ridges on Mars

Berman, Daniel C.; Balme, Matthew R.; Michalski, Joseph R.; Clark, Stacey C. and Joseph, Emily C.S. (2018). High-resolution investigations of Transverse Aeolian Ridges on Mars. Icarus, 312 pp. 247–266.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1016/j.icarus.2018.05.003
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Abstract

Transverse Aeolian Ridges (TARs) are the most pervasive aeolian feature on Mars. Their small size requires high-resolution data for thorough analyses. We have utilized Mars Reconnaissance Orbiter (MRO) Context Camera (CTX) and High Resolution Image Stereo Experiment (HiRISE) images, along with MRO Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) spectroscopic data to study TARs in detail. TAR deposits, along with related dark dune material and layered terrains, have been mapped in six study areas in order to identify sediment pathways and determine whether TARs are sourced locally or from global wind-borne materials. TAR morphology and orientation were mapped in grids within each study area; the results show that TARs are probably locally sourced. We constructed four HiRISE Digital Terrain Models (DTMs) to measure TAR heights, widths, spacing, areas, symmetry, and to calculate sediment volumes. Results show that TARs have average heights of ∼1.5 m, are very symmetrical, and are similar in form to terrestrial megaripples. Orthorectified HiRISE images taken 3 years apart were analyzed for TAR movement and none was found. Superposed craters on equatorial TARs give ages of ∼2 Ma, suggesting that these are relatively ancient and generally inactive aeolian deposits. CRISM data were analyzed over TAR deposits, dark dune material, and light-toned terrains. Although the surfaces were somewhat obscured by dust cover, the results did not show any remarkable difference between TARs and other deposits. We conclude that TARs may be sourced from local materials and form in a similar way to terrestrial megaripples.

Item Type: Journal Item
Copyright Holders: 2018 Elsevier
ISSN: 0019-1035
Project Funding Details:
Funded Project NameProject IDFunding Body
Mars Data Analysis Program#NNX11AI82GNASA (National Aeronautics and Space Administration)
Not SetST/F012020/1UK Space Agency
Wet, moist, or dry? Using digital terrain models to determine the amount of water that has shaped the surfaces of Earth, Mars and the Moon. (SE-10-183-MB)RPG-397The Leverhulme Trust
Keywords: Mars; Mars, surface; Aeolian processes
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 55458
Depositing User: ORO Import
Date Deposited: 14 Jun 2018 14:27
Last Modified: 15 Sep 2018 15:36
URI: http://oro.open.ac.uk/id/eprint/55458
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