terrestrial heat/ mantle plume geometriescentreline temperatureincompressible flowconvection cellsfinite element numerical simulationssteady state convection2D domainsCartesian boxWe investigate the temperature at the center of the vertically rising and sinking limbs of convection cells as a function of geometry...
Mantle plume characteristics in three-dimensional depth- and temperature-dependent modelsACTA GEODAETICA ET GEOPHYSICA -BUDAPEST-Süle, B. l.Süle, B. l.Süle, B. l.Süle, B. l.
Furthermore, seismic velocities in the mantle below Afar are extremely low, as might be expected for high temperatures (e.g. Bastow and Keir, 2011). Yet, recent observations have questioned whether a plume is still involved in the present-day tectonics of the region. Based on seismic S-to...
Measurements of the velocity field associated with plumes rising through a viscous fluid are performed using stereoscopic Particle-Image Velocimetry in the Rayleigh number range 4.4 x 10<SUP>5</SUP>-6.4 x 10<SUP>5</SUP>. The experimental model is analogous to a mantle plume rising from the ...
could be supplied by a mantle plume (Arnold et al., 2001). In this chapter, we focus on the latter possibility and search for possible ultradeep evidence in the garnet-bearing peridotite lenses enclosed in the felsic granulite (hereinafter referred to as Gföhl granulite) of the Bohemian ...
The thermochemical structure of lithospheric and asthenospheric mantle exert primary controls on surface topography and volcanic activity. Volcanic rock compositions and mantle seismic velocities provide indirect observations of this structure. Here, we compile and analyze a global database of the distribut...
The duration of UHT conditions is inconsistent with a mantle plume. It reflects an intracontinental lithospheric architecture where the Musgrave Province was rigidly fixed at the nexus of three thick cratonic masses. This ensured that any asthenospheric upwelling was focused beneath the province, ...
The causes of magmatism at magmatic rifted margins and large igneous provinces (LIPs) are uncertain because the condition of the mantle that underlay them during formation can no longer be directly observed. Therefore, whether the mantle was characterized by elevated potential temperatures (T-P), sm...
Electrolytes play an important role in the internal structure and dynamics of water-rich satellites and potentially water-rich exoplanets. However, in planets, the presence of a large high-pressure ice mantle is thought to hinder the exchange and transport of electrolytes between various liquid and ...
of the felsic granulites were emplaced at 2537-2503 Ma and metamorphosed at 2503-2464 Ma.This study indicates that the UHT metamorphism was also recorded in the felsic granulites from the Eastern Block of the North China Craton.A Neoarchean mantle plume triggered sagduction model represents the ...