How does the mantle plume theory explain hotspot volcanism?

Sep 5, 2013 ... The model revealed channels – dubbed “low-velocity fingers” by the researchers – where seismic waves traveled unusually slowly. The fingers ... The hotspot is fixed, so as the plates move, the first volcano moves away from the source of magma, and then becomes extinct. A new volcano forms over the ... Non-hotspot volcano chains originating from small-scale sublithospheric convection. M. D. Ballmer,1 J. van Hunen,2 G. Ito,3 P. J. Tackley,1 and T. A. Bianco3. A volcanic hotspot is where magma pushes up from deep in the Earth's crust or mantle, and creates a volcano. The hotspots are creating volcanoes. Since the hotspot is mostly stationary when the tectonic plate moves it creates a new volcano. The action of the plates ... Oct 29, 2013 ... This discovery helps to explain how “hotspot volcanoes”—the kind that give birth to island chains like Hawaii and Tahiti—come to exist ... A 30 foot slice of volcano looks like most other rocky terrain. Unless it ... hotspot, volcanoes would form. They would build enormous shield-shaped ... Apr 18, 2013 ... Abstract. While most oceanic volcanism is associated with the passive rise of hot mantle beneath the spreading axes of mid-ocean ridges ... Auckland's volcanoes are powered by a 'hot spot' deep beneath the surface. The hot spot is a zone of magma fed by a plume of hot rock rising up out of the ... Here we present new age and geochemical data from volcanic samples from Richardson Seamount, the Agulhas Ridge along the Agulhas-Falkland Fracture Zone (AFFZ) ...