The viscosity of magma plays a crucial role in the dynamics of the Earth: from the crystallization of a magma ocean during its initial stages to modern-day volcanic processes. However, the pressure-dependence behavior of viscosity at high pressure remain
The viscosity of shoshonitic melts (Vulcanello Peninsula, Aeolian Islands, Italy): in- sight on the magma ascent in dikes. Chemical Geology 245, 89-102.Vetere, F., Behrens, H., Misiti, V., Ventura, G., Holtz, F., De Rosa, R., Deubener, J., 2007. The viscosity of shoshonitic ...
From the distribution and shapes of the ocelli, and the spacing of the diapiric domes, it is calculated that the initial ocellar phase had a density of 2.1 gm/cm 3, an interfacial tension with respect to the fourchite magma of less than 9 dynes/cm and a viscosity considerably greater ...
The crustal accretion along mid-ocean ridges is known to be spreading-rate dependent. Along fast-spreading ridges, two-dimensional sheet-like mantle upwelling creates relatively uniform crust. In contrast, the crust formed along slow-spreading ridges sho
is inversely related to the type and volume of high dielectric minerals, likely to have formed due to surface/atmosphere reactions. The observation of both viscous and low viscosity volcanic flows in Magellan images may also be related to composition. The global NIR emissivity and high-resolution ...
Scaling of plume formation in strongly temperature-dependent viscosity fluids: Application to core-mantle boundary At large viscosity contrasts across the thermal boundary layer at the core-mantle boundary formation of plumes occurs in several steps. First, a conductive thermal boundary layer starts growi...
Kinetic and fluid dynamic constraints on deep-seated magma migration rates suggest ascent velocities in the range 10 to 30 m/s, 10−1 to 10 m/s and 10
To allow topographic build-up of the lithosphere, pseudo-free surface condition is imposed with a top surface layer (air for 20 km and a water layer for 2–4 km) characterized by low viscosity (1018 Pas) and low density (1 kg/m3 for air, 1000 kg/m3 for sea water). 3.3....
A. Geodynamic estimates of the viscosity of the Earth’s inner core. Nature 388, 571–573 (1997). Google Scholar Cardin, P. & Olson, P. Chaotic thermal convection in a rapidly rotating spherical shell: consequences for flow in the outer core. Phys. Earth Planet. Inter. 82, 235–259 ...
The torsion experiments involved fully molten and crystal- bearing felsic end-members and a crystal-bearing mafic magma. By changing the temperature, the crystallinity, hence viscosity, of the mafic material changed, so it was either more or less viscous than the felsic one. We considered that ...