Abstract
Zircons extracted from the nepheline and feldspar crystals of miaskitic and feldspar pegmatites, respectively, are analyzed with the SHRIMP method for the first time. The early (Silurian) zircons coincide in age (432 Ma), composition, and mineralogical peculiarities with early zircons from miaskites. It is concluded that the pegmatite melt is a derivative of the miaskite melt. Permian (240–260 Ma) metamorphic zircons are widespread in pegmatites and miaskites. Zircons from these rocks are characterized by genetic commonality.
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