Seismic evidence for hotspot-induced buoyant flow beneath the Reykjanes Ridge

Publication Type: 
Year of Publication: 
2001
Authors: 
Journal Title: 
Science
Journal Date: 
Aug 31
Volume: 
293
Issue: 
5535
Pages: 
1645-1647
ISBN Number: 
0036-8075
Accession Number: 
ISI:000170802900059
Abstract: 

Volcanic hotspots and mid-ocean ridge spreading centers are the surface expressions of upwelling in Earth's mantle convection system, and their interaction provides unique information on upwelling dynamics. I investigated the influence of the Iceland hotspot on the adjacent mid-Atlantic spreading center using phase-delay times of seismic surface waves, which show anomalous polarization anisotropy-a delay-time discrepancy between waves with different polarizations. This anisotropy implies that the hotspot induces buoyancy-driven upwelling in the mantle beneath the ridge.

Notes: 

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