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Dendritic Ridges in Antoniadi Basin, Mars: Fluvial or Volcanic Landforms?

Mangold, N and Guimpier, A. and Tornabene, L. L. and Conway, Susan and Fawdon, P. and Hauber, Ernst and Noblet, A. and Zaki, A. and Pommerol, A. and Thomas, N. (2023) Dendritic Ridges in Antoniadi Basin, Mars: Fluvial or Volcanic Landforms? Icarus, 406, p. 115735. Elsevier. doi: 10.1016/j.icarus.2023.115735. ISSN 0019-1035.

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Official URL: https://www.sciencedirect.com/science/article/pii/S0019103523003123


Antoniadi basin displays dark-toned dendritic ridges previously interpreted as inverted fluvial channels. Detailed observations of these dark-toned ridges as well as the geological units in the central region of Antoniadi basin are provided emphasizing images from the Colour and Stereo Surface Imaging System (CaSSIS), the High Resolution Stereo Camera (HRSC) and the High Resolution Imaging Science Experiment (HiRISE) instruments. Results show that the dark-toned ridges are part of the most recent geological unit as they overlie, and thus postdate all plains of the central Antoniadi basin, which is Early Amazonian based on its crater size-frequency distribution. Our observations of the dark-toned ridges are not consistent with inverted fluvial channels: they do not widen in the expected downstream direction, they display a rubbly texture and lack layering at high resolution, and have lobes with local levees in place of channel heads. In addition, the branched ridges are more mafic in composition and display a relatively higher thermal inertia than their surroundings. This suite of characteristics is better explained by volcanic flows developed as distributary channels rather than fluvial tributary channels. The occurrence of dikes in the east and west of the studied region supports that these flows were formed by lava, perhaps a'a like flows as suggested by the rubbly texture, but with an unusually high degree of digitation. Alternatively, such a geometry could be explained by the emplacement of the lava along pre-existing fluvial valleys, but neither the underlying topography, nor two nearby older craters, exhibit signs of fluvial erosion.

Item URL in elib:https://elib.dlr.de/196484/
Document Type:Article
Title:Dendritic Ridges in Antoniadi Basin, Mars: Fluvial or Volcanic Landforms?
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Mangold, NLaboratoire Planétologie et Géodynamique de Nantes, LPGN/CNRS, Université NantesUNSPECIFIEDUNSPECIFIED
Guimpier, A.Laboratoire Planétologie et Géodynamique de Nantes, LPGN/CNRS, Université NantesUNSPECIFIEDUNSPECIFIED
Tornabene, L. L.University of Western Ontario, London, ON, CanadaUNSPECIFIEDUNSPECIFIED
Conway, SusanLaboratoire de Planétologie et Géodynamique-UMR CNRS 6112, Nantes, Francehttps://orcid.org/0000-0002-0577-2312UNSPECIFIED
Fawdon, P.Open University, Milton Keynes, UKUNSPECIFIEDUNSPECIFIED
Hauber, ErnstUNSPECIFIEDhttps://orcid.org/0000-0002-1375-304XUNSPECIFIED
Noblet, A.LPG, CNRS, Nantes Université, Université Angers, Le Mans Université, 44322 Nantes, France ; Institute for Earth and Space Exploration, University of Western Ontario, Dept. of Earth Sciences, 1151 Richmond Street, London, Ontario N6A 5B7, CanadaUNSPECIFIEDUNSPECIFIED
Zaki, A.Department of Earth Sciences, University of Geneva, 1205 Geneva, SwitzerlandUNSPECIFIEDUNSPECIFIED
Pommerol, A.Physikalisches Institut, Sidlerstrasse 5, University of Bern, CH-3012 Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Thomas, N.Physikalisches Institut, Universität Bern, SwitzerlandUNSPECIFIEDUNSPECIFIED
Date:2 August 2023
Journal or Publication Title:Icarus
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:p. 115735
Keywords:Mars, geology, water, volcanism, lava, geomorphology, HRSC, CaSSIS
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Planetary Evolution and Life, R - Planetary Exploration
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Hauber, Ernst
Deposited On:28 Aug 2023 09:07
Last Modified:29 Jan 2024 12:21

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