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GEOPHYSICAL RESEARCH LETTERS,
VOL. 31,
L05611,
4 PP., 2004
doi:10.1029/2003GL019235
The Boycott effect in magma chambers
Department of Mechanical Engineering, University of California, Santa Barbara, California, USA
Department of Mathematics, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
Department of Mathematics, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
We investigate the plausibility of the stratified Boycott effect as a source of layering in magma chambers. Crystal settling within the magma chamber will generate buoyant fluid near the sloping sidewalls whose vertical ascent may be limited by the ambient stratification associated with vertical gradients in SiO 2. The resulting flow may be marked by a layered structure, each layer taking the form of a convection cell spanning the lateral extent of the magma chamber. Using parameters relevant to magma chambers, we estimate that such convection cells would be established over a timescale of a month and have a depth on the order of 4m, which is roughly consistent with field observations of strata within solidified chambers.
Received 18 December 2003; accepted 11 February 2004; published 10 March 2004.
Citation: (2004), The Boycott effect in magma chambers, Geophys. Res. Lett., 31, L05611, doi:10.1029/2003GL019235.
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