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Structural analysis of interior layered deposits in Northern Coprates Chasma, Mars

Fueten, Frank and Racher, H. and Stesky, Robert and MacKinnon, Paula and Hauber, Ernst and McGuire, Patrick and Zegers, Tanja and Gwinner, Klaus (2010) Structural analysis of interior layered deposits in Northern Coprates Chasma, Mars. Earth and Planetary Science Letters, 294, pp. 343-356. Elsevier. DOI: 10.1016/j.epsl.2009.11.004

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Official URL: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V61-4XVRM24-2&_user=100058&_coverDate=06%2F01%2F2010&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_acct=C000007338&_version=1&_urlVersion=0&_userid=100058&md5=d4140f11a

Abstract

Interior layered deposits within an embayment on the northern wall of Coprates Chasma in the Valles Marineris, Mars, are studied using HRSC, CTX, HiRISE and CRISM data. The layered material outcrops in three separate locations. The largest layered deposit within the embayment, a free standing central mound, has an approximate stratigraphic thickness of 2 km. Dip directions change along the central axis of this mound, which is also a zone of deformation. The surface texture of layers within this mound displays polygonal structures at HiRISE scale. By contrast, the western layered deposit abuts directly against the chasm wall and appears to have a relatively uneroded depositional surface approximately 600 m below the current top elevation of the central mound. A basement ridge, exposed by a landslide scar near the eastern portion of the area, is covered with layered material and shows downward displacement. We suggest that the entire embayment originated as a small ancestral basin. The displaced basement ridge is evidence of the early basin collapse. The central mound was most likely deposited on a wall rock spur. Deposition did not fill the basin evenly. The detection of hydrated sulfates attests to alteration or deposition by liquid water. Following an erosion event, which coincided with or postdated Valles Marineris formation, thin mesa-forming materials covered most of the area.

Item URL in elib:https://elib.dlr.de/67498/
Document Type:Article
Title:Structural analysis of interior layered deposits in Northern Coprates Chasma, Mars
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fueten, FrankDepartment of Earth Sciences, Brock University, St. Catharines, Ontario, CanadaUNSPECIFIED
Racher, H.Department of Earth Sciences, Brock University, St. Catharines, Ontario, CanadaUNSPECIFIED
Stesky, RobertPangaea Scientific, Brockville, Ontario, CanadaUNSPECIFIED
MacKinnon, PaulaDepartment of Earth Sciences, Brock University, St. Catharines, Ontario, CanadaUNSPECIFIED
Hauber, Ernsternst.hauber (at) dlr.deUNSPECIFIED
McGuire, PatrickUNSPECIFIEDUNSPECIFIED
Zegers, TanjaFaculty of Geosciences, Utrecht University, Utrecht, The NetherlandsUNSPECIFIED
Gwinner, Klausklaus.gwinner (at) dlr.deUNSPECIFIED
Date:2010
Journal or Publication Title:Earth and Planetary Science Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:294
DOI :10.1016/j.epsl.2009.11.004
Page Range:pp. 343-356
Publisher:Elsevier
Status:Published
Keywords:Mars, sediments, water, layering, sulfates, chronology
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Projekt MARS-EXPRESS / HRSC (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Hauber, Ernst
Deposited On:06 Jan 2011 11:43
Last Modified:31 Jul 2019 19:30

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