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Russian Geology and Geophysics

2003 year, number 12

RIFT AND WITHIN-PLATE MAGMATISM IN THE CONTEXT OF HOT AND COLD MANTLE FIELDS

M.I. Kuz'min, A.I. Al'mukhamedov, V.V. Yarmolyuk*, and V.A. Kravchinsky
Vinogradov Institute of Geochemistry, Siberian Branch of the RAS, 1a ul. Favorskogo, Irkutsk, 664033, Russia
* Institute of Mineral Geology, Petrography, Mineralogy, and Geochemistry of the Russian Academy of Sciences,
35 Staromonetnyi per., Moscow, 109017, Russia
Keywords: Rift, within-plate magmatism, mantle hot field, plume, plume tectonics
Pages: 1226-1234

Abstract

Igneous rocks in oceanic and continental rifts are derived from depleted mantle or from deeper lower mantle. Within-plate magmatism may be related to hot mantle fields. The Phanerozoic history of magmatism in Siberia was to a great extent controlled by the drift of the continent over the Central Asian (Atlantic-African) hot field.