Detrital zircon geochronology of Palaeozoic Novaya Zemlya - a key to understanding the basement of the Barents Shelf

The Novaya Zemlya fold‐and‐thrust‐belt is the northern continuation of the late Palaeozoic Uralide Orogen. Little is known about its deeper structure and the basement history of the adjacent Barents and Kara shelves. Based on geological evidence and detrital zircon analysis of 28 samples from the no...

Full description

Saved in:
Bibliographic Details
Published in:Terra nova (Oxford, England) England), 2013-12, Vol.25 (6), p.496-503
Main Authors: Lorenz, Henning, Gee, David G., Korago, Evgeny, Kovaleva, Galina, McClelland, William C., Gilotti, Jane A., Frei, Dirk
Format: Article
Language:English
Subjects:
detritus
geochronology
Geological time
Geology
Novaya Zemlya
Paleozoic
Petrology
zircons
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The Novaya Zemlya fold‐and‐thrust‐belt is the northern continuation of the late Palaeozoic Uralide Orogen. Little is known about its deeper structure and the basement history of the adjacent Barents and Kara shelves. Based on geological evidence and detrital zircon analysis of 28 samples from the northeastern and stratigraphically deepest part of the archipelago, we demonstrate that Cambro‐Ordovician turbidite‐dominated deposition was almost exclusively sourced from rocks consolidated during the Timanian orogeny (Timanian basement). A profound change in provenance occurred near the end of the Ordovician. Over 90% of the zircons from Silurian and about 80% from Devonian strata have ages characteristic of the Sveconorwegian Orogen, implying uplift of these rocks in the vicinity of Novaya Zemlya. The presence of Sveconorwegian and Grenvillian rocks in the high Arctic suggests revision of recent reconstructions of the Rodinia supercontinent, its break‐up and subsequent Caledonian orogeny.
ISSN:0954-4879
1365-3121
1365-3121
DOI:10.1111/ter.12064