Uplift of Beta Regio: Three-dimensional models

Details Uplift of Beta Regio: Three-dimensional models Uplift of Beta Regio: Three-dimensional models

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jgre..10908007v&link_type=abstract

Journal of Geophysical Research, Volume 109, Issue E8, CiteID E08007

Physics

Geophysics

6

Mathematical Geophysics: Modeling, Tectonophysics: Planetary Interiors (5430, 5724), Tectonophysics: Dynamics, Convection Currents And Mantle Plumes, Planetology: Solar System Objects: Venus

Scientific paper

Three-dimensional models of the uplift of Beta Regio caused by a mantle plume satisfy constraints on gravity, topography, rheology, and the uplift rate substantially better than two-dimensional models. In particular, the uplift time of Beta Regio is reduced to an acceptable 800 million years. Three-dimensional models give the plume formation depth around 3000 km, which approximately corresponds to the core-mantle boundary. The results depend only weakly on the initial lithospheric thickness (at the time of global resurfacing), including a very thin initial lithosphere. This implies that the thick present-day lithosphere (~400 km) suggested by our models can be reconciled with a thin lithosphere (100-200 km) inferred from the melt generation rates and the flexural rigidity models.

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