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Martian rifts: Structural geology and geophysics

Hauber, Ernst and Grott, Matthias and Kronberg, Peter (2010) Martian rifts: Structural geology and geophysics. Earth and Planetary Science Letters, 294, pp. 393-410. Elsevier. DOI: 10.1016/j.epsl.2009.11.005

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Official URL: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V61-4XT2CS4-3&_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=8d4ccb4d6

Abstract

Large extensional tectonic surface structures on Mars are investigated on the basis of image and topographic data. These features have lengths of up to 1400 km, typical widths of tens of kilometers, and depths of up to 3000 m. Their structural architecture is characterized by segmentation with changing style, the development of asymmetric basins with changing polarity, and accommodation zones between such basins. Most structures are associated with varying degrees of volcanism. Based on these observations and a comparison to terrestrial continental rifts, we interpret these series of basins or grabens as rift systems. Crater counts of rift-related geologic surface units indicate that rifts on Mars are �4.0 to 3.5 Ga old. Modelling of rift flank uplift yields heat flows ranging between 28 and 66 mW m�2, and a corresponding thickness of the elastic lithosphere in the order of �10 km at the time of rifting. The radial orientation of some rifts with respect to Tharsis is consistent with a rifting mechanism related to regional extensional stresses in the lithosphere. Rifts with other orientations might have formed in response to stress fields induced by horizontal gradients of the gravitational potential energy, modulated by magmatic zones of lithospheric weakness.

Item URL in elib:https://elib.dlr.de/67502/
Document Type:Article
Title:Martian rifts: Structural geology and geophysics
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hauber, Ernsternst.hauber (at) dlr.deUNSPECIFIED
Grott, Matthiasmatthias.grott (at) dlr.deUNSPECIFIED
Kronberg, PeterInstitute of Geology and Paleontology, Technical University ClausthalUNSPECIFIED
Date:2010
Journal or Publication Title:Earth and Planetary Science Letters
Refereed publication:Yes
Open Access:No
In DOAJ:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:294
DOI :10.1016/j.epsl.2009.11.005
Page Range:pp. 393-410
Publisher:Elsevier
Status:Published
Keywords:Mars, tectonics, volcanism, chronology, extension, lithosphere, heat flow, crust
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 11:47
Last Modified:10 Jan 2019 15:47

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