The first results of U-Pb LA-SF-ICP-MS-dating of detrital zircons from terrigenous deposits of the Miniseishor suite of the Nyarovei series of the Harbei anticlinorium of the Polar Urals are presented. The series has a presumably Middle Riphean age and lies at the base of the section of the Polar Ural Upper Precambrian. The data obtained give grounds to limit the lower age interval for the formation of sediments of the Minisejshor suite abroad 660 million years ago. Allotment the Nyarovei series as a Middle Riphean straton is erroneous. Formation of the whole cut the Nyarovei series occurred in a relatively narrow age range at the end of the late Riphean. The dominant role in the formation of deposits of the entire series belonged to the products of erosion close arrays of deeply metamorphosed rocks.

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 ñîñòàâå ìàðóí-êåóñêîãî ýêëîãèò-ãíåéñîâîãî êîìïëåêñà íà Ïîëÿðíîì Óðàëå ïî ãåîëîãè÷åñêèì è ïåòðîãåîõèìè÷åñêèì äàííûì âïåðâûå âûäåëåíû äâå ñåðèè ïåðâè÷íî-ìàãìàòè÷åñêèõ ïîðîä, îáðàçîâàâøèåñÿ â ðàçëè÷íûõ ãåîäèíàìè÷åñêèõ îáñòàíîâêàõ. Îäíà èç íèõ ìåòàâóëêàíîãåííàÿ -ïîëîñ÷àòûå ýêëîãèòû, àìôèáîëèòû è ïëàãèîãíåéñû, âòîðàÿ ìåòàïëóòîíè÷åñêàÿ -ìàññèâíûå àïîãàááðîâûå ýêëîãèòû è ìåòàïåðèäîòèòû.Ìåòàâóëêàíèòû èìåþò ïðèçíàêè îáðàçîâàíèÿ â îñòðîâîäóaeíûõ îáñòàíîâêàõ. Ìåòàìîðôèçîâàííûå ïëóòîíè÷åñêèå ïîðîäû ìà-ôèò-óëüòðàìàôèòîâîãî ñîñòàâà ïðåäñòàâëÿþò ñîáîé ñàìîñòîÿòåëüíûé ìàòàèíòðóçèâíûé êîìïëåêñ. Ãåîõèìè÷åñêèå äàííûå óêàçûâà-þò íà ôîðìèðîâàíèå ýòèõ ïîðîä â íàäñóáäóêöèîííîé îáñòàíîâêå, âîçìîaeíî ñ êîíòàìèíàöèåé êîíòèíåíòàëüíîãî âåùåñòâà (ïîâûøåí-íûå ñîäåðaeàíèÿ Ba, Sr è Rb).Êëþ÷åâûå ñëîâà: Ïîëÿðíûé Óðàë, ýêëîãèòû, ãåîäèíàìè÷åñêèå îáñòàíîâêè. According to the geological and petrogeochemical data, two series of primary magmatic rocks formed in different geodynamic settings were distinguished in the Marun-keu eclogite-gneiss complex for the first time. One of them is metavolcanogenic consisting of banded eclogites, amphibolites, and plagiogneiss; the other -metaplutonic, composed of massive apogabbroic eclogites and metaperidotites. TWO SERIES OF PRIMARY MAGMATIC ROCKS IN THE MARUNKEU ECLOGITE-GNEISS COMPLEX, THE POLAR URALSMetavolcanics show traces of their formation in island arc conditions. Metamorphosed plutonic rocks of the mafic-ultramafic composition make up an independent metaintrusive complex. Geochemical data indicate the formation of these rocks in suprasubduction environments, possibly with the contamination of continental material (higher contents of Ba, Sr, and Rb).

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