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Valles Marineris tectonic and volcanic history inferred from dikes in eastern Coprates Chasma

Brustel, Clément and Flahaut, J. and Hauber, Ernst and Fueten, Frank and Quantin-Nataf, C. and Stesky, Robert and Davies, G.R. (2017) Valles Marineris tectonic and volcanic history inferred from dikes in eastern Coprates Chasma. JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 122, pp. 1353-1371. Wiley. DOI: 10.1002/2016JE005231 ISSN 2169-9097

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/2016JE005231/full

Abstract

Magmatic dikes have been proposed to have weakened and fractured the crust, allowing the formation of Valles Marineris. Hence, dikes were studied in the region of eastern Coprates Chasma in an area that includes a major transition between Hesperian-aged volcanic deposits in the western walls and pristine Noachian crust in the eastern walls. Over a hundred dikes were identified. Dike widths are 13 m on average. Estimation of magma eruption rates are comparable with previous estimates for Hesperian lava flows on Mars (105 to 106 m3 s-1). Dikes dips range from 55° to 90°; orientations record two distinct main tectonic stress fields (90° and 70°) different from the Chasmata. Dikes striking 90° are only observed at elevations below 1500 m. Dikes striking 70° are observed at elevation below 0 m and are therefore considered older. However, linear features are also observed on the late Noachian/early Hesperian surrounding plateaus and could be related to the 70° dike group. In the western part of our study area, dikes (~10% of the total amount of dikes mapped) strike 110, subparallel to Valles Marineris, and suggest a relationship between dike emplacement and graben formation. The presence of preexisting faults in the two directions (90° and 70°) could explain the shape of eastern Valles Marineris and chaotic terrains, which have a different general orientation than the Valles Marineris main rift. Our results suggest a complex relationship between dike emplacement and the formation of Valles Marineris.

Item URL in elib:https://elib.dlr.de/116410/
Document Type:Article
Title:Valles Marineris tectonic and volcanic history inferred from dikes in eastern Coprates Chasma
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Brustel, ClémentFaculty of earth and life science, VU University Amsterdam, de boelelaan 1085, 1081 hv amsterdam, the netherlandsUNSPECIFIED
Flahaut, J.laboratoire de géologie de lyon, ecole normale supérieure de lyon, lyon, université lyon 1, franceUNSPECIFIED
Hauber, ErnstErnst.Hauber (at) dlr.dehttps://orcid.org/0000-0002-1375-304X
Fueten, Frankdepartment of earth sciences, brock university, st. catharines, ontario, canadaUNSPECIFIED
Quantin-Nataf, C.laboratoire géologie de lyon, la doua, université claude bernard lyonUNSPECIFIED
Stesky, Robertpangaea scientificUNSPECIFIED
Davies, G.R.Earth Sciences Department, Vrije University Amsterdam, Amsterdam, Netherlandshttps://orcid.org/0000-0002-6136-9202
Date:2017
Journal or Publication Title:JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
Refereed publication:Yes
Open Access:No
In DOAJ:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:122
DOI :10.1002/2016JE005231
Page Range:pp. 1353-1371
Publisher:Wiley
ISSN:2169-9097
Status:Published
Keywords:Mars, volcanism, tectonics, dikes, Valles Marineris
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):Project MARS-EXPRESS / HRSC
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Institute of Planetary Research > Planetary Geology
Deposited By: Hauber, Ernst
Deposited On:30 Nov 2017 14:47
Last Modified:30 Nov 2017 14:47

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