Open AccessFirst results of U-Pb LA-SF-ICP-MS-dating detrital zircons from the middle riphean (?) terrigenous deposits of the Polar Urals
Author(s) -
N. S. Ulyasheva,
Yu. I. Pystina,
А. М. Пыстин,
О. В. Гракова,
V. B. Hubanov
Publication year - 2019
Publication title -
doklady akademii nauk. rossijskaâ akademiâ nauk
Language(s) - English
Resource type - Journals
ISSN - 0869-5652
DOI - 10.31857/s0869-56524854488-492
Subject(s) - riphean , terrigenous sediment , geology , geochemistry , precambrian , tourmaline , series (stratigraphy) , paleontology , sedimentary rock
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.