Laboratory investigations of viscous effects in replenished magma chambers

Details Laboratory investigations of viscous effects in replenished magma chambers Laboratory investigations of viscous effects in replenished magma chambers

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983e%26psl..65..377h&link_type=abstract

Earth and Planetary Science Letters, Volume 65, Issue 2, p. 377-381.

Physics

24

Scientific paper

Some laboratory experiments are described which investigate the dynamical effects of replenishment of a magma chamber containing high viscosity magma by hotter, denser and much more fluid magma. In the experiments a layer of hot KNO3 solution is emplaced beneath cold glycerine, which has a viscosity 3000 times greater. Less dense fluid is released immediately and continuously from the interface as a result of crystallization in the lower layer and rises as plumes through the overlying glycerine. Further crystallization occurs in the plumes, and the crystals fall out; but there is little mixing between the two fluids and a layer of depleted KNO3 solution forms at the top. The experiments demonstrate that interfacial processes begin to dominate where there are large viscosity differences between adjacent fluid layers as would be the case in a rhyolitic magma chamber replenished by basaltic magma.

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