Mantle plumes and continental tectonics

Details Mantle plumes and continental tectonics Mantle plumes and continental tectonics

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992sci...256..186h&link_type=abstract

Science (ISSN 0036-8075), vol. 256, April 10, 1992, p. 186-193. Research supported by Australian Consolidated Minerals, Aztec Ex

Physics

81

Earth Crust, Earth Mantle, Geodynamics, Plates (Tectonics), Plumes, Continents, Dynamic Models, Free Convection

Scientific paper

Mantle plumes and plate tectonics, the results of two distinct modes of convection within the earth, operate largely independently. Although plumes are secondary in terms of heat transport, they have probably played an important role in continental geology. A new plume starts with a large spherical head that can cause uplift and flood basalt volcanism, and may be responsible for regional-scale metamorphism or crustal melting and varying amounts of crustal extension. Plume heads are followed by narrow tails that give rise to the familiar hot-spot tracks. The cumulative effect of processes associated with tail volcanism may also significantly affect continental crust.

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