The provenance of terrigenous rocks of the basal horizons of the Uralides of the Baidarata Allochthon (Polar Urals) according to the U–Pb isotope age of detrital zircons

The U–Pb (LA–ICP–MS) age of detrital zircons from the Upper Cambrian–Lower Ordovician terrigenous rocks of the Baidarata Allochthon, which is located in the northern part of the Polar Urals, is determined. The analysis of the youngest zircon population indicates a broad occurrence of the Uralides in...

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Bibliographic Details
Published in:Moscow University geology bulletin 2017-05, Vol.72 (3), p.172-180
Main Authors: Sychev, S. N., Ivleva, A. S., Petrov, S. Yu, Petrova, M. N., Ershova, V. B., Veselovskii, R. B., Konnov, A. G.
Format: Article
Language:English
Subjects:
Archipelagoes
Arctic zone
Cambrian
Earth and Environmental Science
Earth Sciences
Geology
Island arcs
Isotopes
Ordovician
Provenance
Rock
Rocks
Zircon
Zirconium
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Summary:The U–Pb (LA–ICP–MS) age of detrital zircons from the Upper Cambrian–Lower Ordovician terrigenous rocks of the Baidarata Allochthon, which is located in the northern part of the Polar Urals, is determined. The analysis of the youngest zircon population indicates a broad occurrence of the Uralides in this area rather than Pre-Uralides, as was considered previously. The Bedamel island-arc rocks (rather than Timan orogen) were probably the major provenance for the studied sequences. The results of statistical processing of the U–Pb ages of zircons from coeval rocks of Arctic regions suggest similar provenances for the Baidarata Allochthon and Novaya Zemlya and Severnaya Zemlya archipelagoes.
ISSN:0145-8752
1934-8436
DOI:10.3103/S0145875217030048