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A~ST,RAC~ Microcrysmlliuc .oxide.s (spinel. ilmenite. and pcrovskitc) in thegrounc..hnass orkimberlite and rckucd rocks were analyzed from I.mlle.kimberlite fields of the Yakurian Dinmoud Province, Modal abundances and chemical compo sitions of the oxide phases nrc useful parameters lor ~ I l llbe r il le pm~pectlng and 10 cvuluatc kimberlite generation nnd evolution. There arc four different oxide parngcncscs in the groun dnuiss of the studied yOl :k,s. wlm:l.l co.rrcspl.m d 10 !l igh-~g ~ iJllI~rlj tc.s wl.th chromium spinel. magnesian-ferrous kimbcrlitcx with chromcspincl-picrcilmcnitc, l llagn~~ ~an-J cmlll sti t alllui n kimbcrlitcs WI th picroilmcnitc-uumcmngnctitc and related reeks (picritcs and alnoitcs) with ritanomagnctirc-pcrovskhc. The (hifcrcnccs in nucroc rystallinc ox ides arc a sensitive indicator of kimberlite diamond grudc.

MINERALOGY OF OXIDES FROM KIMBERLITE GROUNDMASS: GENETIC AND APPLIED ASPECTS (AN EXAMPLE FROM THE YAKUTIAN DIAMOND PROVINCE)