The paper deals with comparison of the Sm - Nd model ages of the whole-rock samples of Vendian (ca. 550 Ma) continental flood basalts of the Volyn region and <$E roman {~sup 207 Pb "/" sup 206 Pb}> ages of zircons isolated from basalts. Sm - Nd model ages vary between 2050 and 1090 Ma with two spikes at 1500 - 1700 and ca. 2000 Ma. <$E roman {~sup 207 Pb "/" sup 206 Pb}> zircon ages form four groups: ca. 2000, 1820, 1470 Ma, and (<$E 549~symbol С~29>) Ma. The former age corresponds to the time of basalt eruption. Sm - Nd model and <$E roman {~sup 207 Pb "/" sup 206 Pb}> zircon ages reveal good correspondence to the age of crust formation and stabilization of the lithospheric mantle in the western (svecofenian) part of the East-European craton and evidence about a significant role of the lithospheric source. Role of the plume material was impaired but increased drastically at the latest stages of magmatism.

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