G. L. Kashintsev
Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia
Received December 14, 2000
Abstract—The magmatic rocks of the Shatsky Rise form two groups of rocks replacing one another in time.
The earlier ferrotholeiites enriched in potassium compose large massifs. Trachybasalts form seamounts and
neotectonic ridges. The composition of the volcanites indicates that two sources of magmatism took part in their
formation: a depleted source characteristic of the basalts of mid-ocean ridges and a “plume” source participat-
ing in the formation of oceanic plateaus.
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