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Seismic tomography shows that upwelling beneath Iceland is confined to the upper mantle 总被引：3，自引：0，他引：3
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Crustal structure beneath western and eastern Iceland from surface waves and receiver functions 总被引：1，自引：0，他引：1
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The seismic anomaly beneath Iceland extends down to the mantle transition zone and no deeper 总被引：8，自引：0，他引：8
G. R. Foulger M. J. Pritchard B. R. Julian J. R. Evans R. M. Allen G. Nolet W. J. Morgan B. H. Bergsson P. Erlendsson S. Jakobsdóttir S. Ragnarsson R. Stefansson K. Vogfjörd 《Geophysical Journal International》2000,142(3):F1-F5
A 3-D teleseismic tomography image of the upper mantle beneath Iceland of unprecedented resolution reveals a subvertical low wave speed anomaly that is cylindrical in the upper 250 km but tabular below this. Such a morphological transition is expected towards the bottom of a buoyant upwelling. Our observations thus suggest that magmatism at the Iceland hotspot is fed by flow rising from the mantle transition zone. This result contributes to the ongoing debate about whether the upper and lower mantles convect separately or as one. The image also suggests that material flows outwards from Iceland along the Reykjanes Ridge in the upper 200 km, but is blocked in the upper 150 km beneath the Tjornes Fracture Zone. This provides direct observational support for the theory that fracture zones dam lateral flow along ridges. 相似文献
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