The Boycott effect in magma chambers

Details The Boycott effect in magma chambers The Boycott effect in magma chambers

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3105611b&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 5, CiteID L05611

Physics

Tectonophysics: Physics Of Magma And Magma Bodies, Volcanology: Lava Rheology And Morphology, Volcanology: Physics And Chemistry Of Magma Bodies

Scientific paper

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 SiO2. 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.

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