Physics – Geophysics
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990e%26psl..96..349h&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 96, no. 3-4, Jan. 1990, p. 349-366. Research supported by NSF and NAS
Physics
Geophysics
16
Convective Flow, Earth Mantle, Geochemistry, Geophysical Fluids, Heat Sources, Anomalies, Geophysics, Magma, Time Dependence
Scientific paper
The role of heterogeneous distribution of heat-producing elements (HPE) in time-dependent mantle convection is examined. A simple two-dimensional Boussinesq fluid dynamical model is used to perform calculations of HPE anomalies and plume dynamics. It is found that HPE anomalies result in more rapid growth of the plumes. It is suggested that the plumes with HPE may dominate over other thermal plumes. Plume-plume interactions prevent plumes from being sheared by the large-scale background flow and provide an efficient mode for transporting heat and HPE anomalies. A dynamical model in which the generation and persistence of plumes are strongly controlled by HPE anomalies and plume-plume interactions is proposed.
Honda Satoru
Yuen David A.
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