User:MangoTangerine/Juan de Fuca Plate

Lithosphere–Asthenosphere boundary beneath Juan de Fuca
In 2016, a geophysical study was published on the possible presence of a layer of buoyant material between the Earth's lithosphere and the asthenosphere under the Juan de Fuca Plate. The study extends the theory of partial melt in this lithosphere-asthenosphere boundary at the subduction zones, specifically in the convergent margins.

Using teleseismic body-wave tomography, a low-velocity zone of thickness 50~100 km in the sublithospheric region beneath the Juan de Fuca plate was detected. The observation, along with fluid-mechanical calculations that factor in Couette and Poiseuille flows, supports the hypothesis of the accumulation of the buoyant material, characterized by its low viscosity. The exact source of this anomaly remains unknown.