2021
DOI: 10.1093/gji/ggab112
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Magmatic channelization by reactive and shear-driven instabilities at mid-ocean ridges: a combined analysis

Abstract: Summary It is generally accepted that melt extraction from the mantle at mid-ocean ridges is concentrated in narrow regions of elevated melt fraction called channels. Two feedback mechanisms have been proposed to explain why these channels grow by linear instability: shear flow of partially molten mantle and reactive flow of the ascending magma. These two mechanisms have been studied extensively, in isolation from each other, through theory and laboratory experiments as well as field and geophys… Show more

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Cited by 6 publications
(4 citation statements)
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“…It is quite possible that MVO has different properties at small and large strains, perhaps as a result of the development of melt-rich bands. Melt bands may form under conditions for which melt volumes are elongated toward the maximum compression direction (Butler, 2012;Katz et al, 2006;Rees Jones et al, 2020), but their later evolution may be influenced by the kind of uniplanar flow and MVO anisotropy we describe here. Flow perpendicular to the plane of melt-rich bands appears limited at high strain.…”
Section: Relation Between Melt Geometry and Permeability And The Evol...mentioning
confidence: 90%
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“…It is quite possible that MVO has different properties at small and large strains, perhaps as a result of the development of melt-rich bands. Melt bands may form under conditions for which melt volumes are elongated toward the maximum compression direction (Butler, 2012;Katz et al, 2006;Rees Jones et al, 2020), but their later evolution may be influenced by the kind of uniplanar flow and MVO anisotropy we describe here. Flow perpendicular to the plane of melt-rich bands appears limited at high strain.…”
Section: Relation Between Melt Geometry and Permeability And The Evol...mentioning
confidence: 90%
“…Another form of melt localization, the reaction infiltration instability (Aharonov et al., 1995; Pec et al., 2017, 2020; Spiegelman et al., 2001) is expected to dominate over stress‐driven melt localization throughout most of the mid‐ocean ridge melting regime, though both operate together in many regions (Rees Jones et al., 2020). While King et al.…”
Section: Discussionmentioning
confidence: 99%
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