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An alternative mechanism for recent volcanism on Mars

Schumacher, S. and Breuer, D. (2007) An alternative mechanism for recent volcanism on Mars. Geophysical Research Letters, 34, L14202. doi: 10.1029/2007GL030083. ISSN 0094-8276.

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Images of the Martian surface indicate that volcanism is a recent process on Mars with ages of the youngest lava flows of about 2 Ma. Interestingly, these young lava flows are confined to the large, old volcanic centers of Tharsis and Elysium, which exhibit a thickened crust compared to surrounding areas. The origin of the volcanic centers but also their longstanding volcanic activity is often explained by strong mantle plumes arising from the core-mantle boundary. However, their existence and sustainment during the last few billion years is uncertain under Martian conditions. Alternatively, the thermal insulation by the crust could cause the longstanding volcanic activity. We show that a locally thickened crust, which has a lower thermal conductivity and is enriched in radioactive heat sources in comparison to the mantle, leads to significant lateral temperature variations in the upper mantle sufficient to generate partial melt even in the present Martian mantle.

Item URL in elib:https://elib.dlr.de/50095/
Document Type:Article
Title:An alternative mechanism for recent volcanism on Mars
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Schumacher, S.Institut für Planetologie, Westfälische Wilhelms-Universität Münster, Münster, GermanyUNSPECIFIEDUNSPECIFIED
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:L14202
Keywords:Mars; volcanism
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: Musiol, Stefanie
Deposited On:24 Jul 2007
Last Modified:15 Jan 2010 01:19

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