New data on U-Pb-age and geochemistry of zircon (Shrimp-II, SIMS) from Ichetu occurrence (Middle Timan)

For the first time zircons from conglomerate-breccia bed of the Ichetyu occurrence were analyzed with local dating (U-Pb-method, SHRIMP-II and SIMS). The wide range of age values within the interval from 3283 to 706 Ma was determined. The high-yttrium and mid-yttrium varieties were marked among zircons, yttrium contents correlate with heavy rare earth elements and phosphorus. The obtained material corresponds to the dating results and geochemistry of zircons selected from underlying titanium ores of Pizhemskoe deposit. This fact proves a single zircon source for both industrial sites. In addition zircon could originate from different depth levels of underlying crystal basement.