Early transient superplumes and the origin of the Martian crustal dichotomy

Details Early transient superplumes and the origin of the Martian crustal dichotomy Early transient superplumes and the origin of the Martian crustal dichotomy

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jgre..11110001k&link_type=abstract

Journal of Geophysical Research, Volume 111, Issue E10, CiteID E10001

Physics

Geophysics

17

Planetary Sciences: Fluid Planets: Interiors (8147), Tectonophysics: Planetary Interiors (5430, 5724, 6024), Tectonophysics: Hotspots, Large Igneous Provinces, And Flood Basalt Volcanism, Tectonophysics: Rheology: Mantle (8033), Mathematical Geophysics: Instability Analysis

Scientific paper

The large temperature difference between the core and mantle of Mars at the end of planetary accretion creates a hot, internally convecting thermal boundary layer at the base of the mantle, whose viscosity is several orders of magnitude lower than the viscosity of the mantle above it. Theoretical analysis and numerical simulations of the instability of this thermal boundary layer show that it is likely that only one large plume forms. This superplume may play a role in the formation of crustal dichotomy and generation of the magnetic field in the early history of Mars.

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