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The thermal state of the Venusian mantle

JAFAR AKANI-HAMED

Earth, moon, and planets, 1991-10, Vol.55 (1), p.51-68 [Periódico revisado por pares]

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Título:
The thermal state of the Venusian mantle
Autor: JAFAR AKANI-HAMED
Assuntos: Astronomy ; Cosmochemistry. Extraterrestrial geology ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; Extraterrestrial geology ; Planets, their satellites and rings. Asteroids ; Solar system ; Venus
É parte de: Earth, moon, and planets, 1991-10, Vol.55 (1), p.51-68
Notas: ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: Assuming that the surface topography of the Ovda and Thetis plateaus and that of the saddle region between Thetis and Atla plateaus is due to surface subsidence of oceanic-type thermal boundary layers, the temperature is calculated at 200 km beneath the plateaus to be about 1600 C and that beneath the saddle region to be about 1400-1500 C. The total subsidence of Ovda plateau in the last 3/4 of its existence - i.e., between 200 km and 800 km off the postulated ridge axis - suggests that the plateau is probably a young feature, less than 40 Myr old. The spreading plate models imply a half-spreading rate of 2.3-5.3 cm/yr for the plateaus and 2-2.8 cm/yr for the saddle region. (Author)
Editor: Boston: Reidel
Idioma: Inglês

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