Transient magmatic convection prolonged by solidification

Details Transient magmatic convection prolonged by solidification Transient magmatic convection prolonged by solidification

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17.1125b&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, July 1990, p. 1125-1128. Research supported by the Institut de Physique

Physics

Fluid Dynamics

3

Earth Crust, Heat Transfer, Magma, Rayleigh Number, Solidification, Binary Systems (Materials), Dendritic Crystals, Eutectics, Fluid Dynamics

Scientific paper

Fluid dynamic experiments have been conducted on the solidification of a paraffin layer, in order to elucidate the transient stage of convection created in cooling magma by the fact that strong changes in viscosity with crystallization lock up within an inwardly propagating crust much buoyancy that would otherwise be available to drive convection. The interior of the magma remains isothermal, and the temperature decreases uniformly until it is locked at the convective liquidus; the crystals are fine hairlike dendrites without major compositional differentiations. Measurements over time are presented of crust thickness, convective velocity, and heat transfer.

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