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Bunge et al. 1998

Bunge, H.P., Richards, M.A., Lithgow-Bertelloni, C., Baumgardner, J.R., Grand, S.P. and Romanowicz, B.A. (1998). Time scales and heterogeneous structure in geodynamic earth models. Science 280(5360): 91-95.

Computer models of mantle convection constrained by the history of Cenozoic and Mesozoic plate motions explain some deep-mantle structural heterogeneity imaged by seismic tomography, especially those related to subduction. They also reveal a 150-million-year time scale for generating thermal heterogeneity in the mantle, comparable to the record of plate motion reconstructions, so that the problem of unknown initial conditions can be overcome. The pattern of lowermost mantle structure at the core-mantle boundary is controlled by subduction history, although seismic tomography reveals intense large-scale hot (low-velocity) upwelling features not explicitly predicted by the models.

BACKGROUND DATA FILES

	Abstract

	Table 1

Keywords
mantle convection, dynamic earth, subduction, viscosity, velocity, depth

Journal
Science
http://www.sciencemag.org/

Publisher
American Association for the Advancement of Science
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