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...

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Bibliographic Details
Published in:	Terra nova (Oxford, England) Vol. 25; no. 6; pp. 496 - 503
Main Authors:	Lorenz, Henning, Gee, David G., Korago, Evgeny, Kovaleva, Galina, McClelland, William C., Gilotti, Jane A., Frei, Dirk
Format:	Journal Article
Language:	English
Published:	Oxford Blackwell Publishing Ltd 01-12-2013
Subjects:	detritus geochronology Geological time Geology Novaya Zemlya Paleozoic Petrology zircons
Online Access:	Get full text
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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.
Bibliography:	Figure S1. Map with sample locations.Table S1. Analytical Data.Appendix S1. Analytical Methods. ark:/67375/WNG-9KLHQZKN-Q U.S. NSF - No. EAR0948359; No. EAR1049368; No. EAR-1032156 istex:C73EF2E0312CF38A5E5C0C33E87D98F968D06C0B ArticleID:TER12064 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0954-4879 1365-3121 1365-3121
DOI:	10.1111/ter.12064