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Grott, M. and Breuer, D. (2008) The evolution of the martian elastic lithosphere and implications for crustal and mantle rheology. Icarus: International Journal of Solar System Studies, 193 (2), pp. 503-515. Elsevier. doi: 10.1016/j.icarus.2007.08.015.
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Abstract
Estimates of the martian elastic lithosphere thickness T<sub>e</sub> imply that T<sub>e</sub> increased from around 20 km in the Noachian to about 70 km in the Amazonian period. A phase of rapid lithospheric growth is observed during the Hesperian and we propose that this elastic thickness history is a consequence of the martian crustal rheology and its thermal evolution. A wet crustal rheology is found to generate a mechanically incompetent layer in the lower crust during the early evolution and the rapid growth of T<sub>e</sub> during the Hesperian results from the disappearance of this layer due to planetary cooling. The incompetent layer and the related rapid lithospheric growth are absent for a dry basaltic crustal rheology, which is therefore incompatible with the observations. Furthermore, we find that the observed elastic thickness evolution is best compatible with a wet mantle rheology, although a dry mantle cannot be ruled out. It therefore seems likely that rheologically significant amounts of water were retained in the Martian crust and mantle after planetary accretion.
| Item URL in elib: | https://elib.dlr.de/52677/ | |||||||||
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| Document Type: | Article | |||||||||
| Title: | The evolution of the martian elastic lithosphere and implications for crustal and mantle rheology | |||||||||
| Authors: |
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| Date: | 2008 | |||||||||
| Journal or Publication Title: | Icarus: International Journal of Solar System Studies | |||||||||
| Refereed publication: | Yes | |||||||||
| Open Access: | No | |||||||||
| Gold Open Access: | No | |||||||||
| In SCOPUS: | No | |||||||||
| In ISI Web of Science: | Yes | |||||||||
| Volume: | 193 | |||||||||
| DOI: | 10.1016/j.icarus.2007.08.015 | |||||||||
| Page Range: | pp. 503-515 | |||||||||
| Publisher: | Elsevier | |||||||||
| Status: | Published | |||||||||
| Keywords: | Mars; Mars, interior; Thermal histories; Geophysics; Elastic lithosphere | |||||||||
| 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 - Vorhaben Vergleichende Planetologie (old) | |||||||||
| Location: | Berlin-Adlershof | |||||||||
| Institutes and Institutions: | Institute of Planetary Research > Planetary Physics | |||||||||
| Deposited By: | Hempel, Stefanie | |||||||||
| Deposited On: | 29 Feb 2008 | |||||||||
| Last Modified: | 27 Apr 2009 14:37 |
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