The bent Hawaiian-Emperor hotspot track: inheriting the mantle wind

Science. 2009 Apr 3;324(5923):50-3. doi: 10.1126/science.1161256.

Abstract

Bends in volcanic hotspot lineaments, best represented by the large elbow in the Hawaiian-Emperor chain, were thought to directly record changes in plate motion. Several lines of geophysical inquiry now suggest that a change in the locus of upwelling in the mantle induced by mantle dynamics causes bends in hotspot tracks. Inverse modeling suggests that although deep flow near the core-mantle boundary may have played a role in the Hawaiian-Emperor bend, capture of a plume by a ridge, followed by changes in sub-Pacific mantle flow, can better explain the observations. Thus, hotspot tracks can reveal patterns of past mantle circulation.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.