Typomorphic features of minerals of ti ores from the Pizhemskoe deposit

A.B. Makeev

UDК 549.08

The technology of production of concentrates of Ti minerals from ores of the Pizhemskoe deposit is improved and includes crushing, mechanical removal of slime flms, desliming, gravitation concentration, classifcation, and magnetic separation. Almost the entire leucoxene is concentrated in the non-magnetic fraction of –0.50 + 0.125 mm in size, whereas leucoxene, rutile and zircon accumulate in fraction of –0.125 + 0.040 mm in size. The magnetic fraction contains ilmenite, Fe-rutile, «pseudorutile» and siderite. The ratio between leucoxene and magnetic Ti minerals in collective concentrate is ≈ 5 : 3 and that of «pseudorutile», ilmenite, and Fe-rutile is ≈ 20 : 4 : 6. The composition and typomorphic features of minerals of ore concentrates are characterized. The U-Pb age of zircon varies from 2740 to 334 Ma. These data are consistent with results of the study of age and geochemistry of zircon from the Ichet’yu occurrence that indicates the common deep source of zircons of these deposits.

Figures 17. Tables 13. References 20.

Key words: Timan, Pizhemskoe deposit, ore concentrates, ilmenite, Fe-rutile, «pseudorutile», rutile, leucoxene, xenotime, monazite, Cr-spinels, amphibole, tourmaline, mica, zircon.

МINERALOGY№ 1 2016