THE LATE-STAGE OF EVOLUTION OF THE NORTHERN PART OF THE OKHOTSK-CHUKCHI VOLCANOGENIC BELT

As a result of field studies conducted in the Enmyvaam River basin in 1991 and 1993, it has been found chat stratigraphic units of volcanic rocks of the late stage of the Okhotsk-Chukchi volcanogenic belt (OCVB ) evolution make up a succession (from the base upward) of the Ergyvaa m, Emuneret, and Enmyvaam formations, The work also resulted in obtain ing new palynologic and magnetostratigraphic data. Racks with reversed magnetization (the middle part: of the Emuneret Formation) were revea led and observed for the first time among volcanic complexes of the OC VB, The rocks occur stratigraphically above layers with the Ust'-Emune ret floral assemblage referred by palynological data to the late Turon ian, The reversed polarity zone (R-zone) revealed correlates with the Klyuev I;R-zone (the middle Coniacian) of the general paleomagnetic sc ale for the Phanerozoic of continents, The lower pari: of the Enmyvaam Formation comprises the late Turonian-early Senonian palynological as semblage. Taking into account the stratigraphic position of the Enmyva am Formation and the normal magnetization of its rocks, the formation is dated back to the Santonian. This was the first attempt to apply th e combined paleophytological, palynological, and magnetostratigraphic data for correlation the Cretaceous volcanogenic deposits in northeast ern Russia.