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Revised thermal evolution models of the Moon: Influence of the crustal thermal conductivity

Breuer, D. und Gottschaldt, K. und Schumacher, S. (2005) Revised thermal evolution models of the Moon: Influence of the crustal thermal conductivity. In: Geophysical Research Abstracts, 7, . 2nd General Assembly of the EGU, 2005-04-25 - 2005-04-29, Vienna (Austria). ISSN 1607-7962

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Kurzfassung

Early thermal evolution models of the Moon have usually used an average thermal conductivity of 4 W/mK for both the mantle and the crust. However, as the conductivity decreases strongly with increasing porosity for atmosphere less bodies like the Moon, much lower values are expected in the upper regolith-megaregolith layer. Here, the thermal conductivity is about 0.005 W/mK at the surface and increases due to compaction to about 2 W/mK at the bottom of the megaregolith layer. This layer is estimated to extend to a depth of about 20 km. The solid anorthositic crust has a thermal conductivity of only about 2 W/mK. In the present study, we examine the influence of a low crustal thermal conductivity on the Moon’s thermal evolution. We use numerical models of mantle convection, parameterized and 3-d spherical. The influence of the crustal thickness, the depletion of radioactive elements in the mantle, the mantle rheology and possibly a stratification of the mantle due to freezing of an early magma ocean will be considered. In general, the results show that the cooling history differs significantly from the results of earlier evolution models and higher temperatures of the lunar interior can be expected. Depending on the depletion of the mantle in radioactive elements, a partial melt zone could have been present in the deep mantle for most of the Moon’s evolution due to the thermal blanketing of the crust.

Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Revised thermal evolution models of the Moon: Influence of the crustal thermal conductivity
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Breuer, D.NICHT SPEZIFIZIERT
Gottschaldt, K.Earth Systems Science, Computational Centre, University of Queensland, Australia
Schumacher, S.Institute of Planetology, University of Münster, Germany
Datum:2005
Erschienen in:Geophysical Research Abstracts
Referierte Publikation:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Band:7
Seitenbereich:
ISSN:1607-7962
Status:veröffentlicht
Stichwörter:Moon, thermal evolution, thermal conductivity, crust
Veranstaltungstitel:2nd General Assembly of the EGU
Veranstaltungsort:Vienna (Austria)
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2005-04-25 - 2005-04-29
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EW - Erforschung des Weltraums
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Vergleichende Planetologie (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Planetenphysik
Hinterlegt von: Nils Müller
Hinterlegt am:08 Dez 2005
Letzte Änderung:27 Apr 2009 04:44

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