Timing of Back–Arc Spreading of the Paleozoic Island Arc of the Urals: Implication of Sm–Nd and U–Pb Dating of Dolerites and the Composition of Inclusions in Zircon
- Authors: Ivanov K.S.1, Berzin S.V.1, Erokhin Y.V.1, Ronkin Y.L.1, Khiller V.V.1
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Affiliations:
- Zavaritskii Institute of Geology and Geochemistry, Ural Branch, Russian Academy of Sciences
- Issue: Vol 484, No 1 (2019)
- Pages: 97-100
- Section: Geochemistry
- URL: https://journals.rcsi.science/1028-334X/article/view/194560
- DOI: https://doi.org/10.1134/S1028334X19010239
- ID: 194560
Cite item
Abstract
Dolerites of the parallel dikes formed in a back-arc spreading setting have been dated by Sm–Nd to the Silurian (426 ± 34 Ma) for Mount Azov in the Central Urals. The age coincides with that for zircons (428.5 ± 3.7 Ma) from the East Ural Megazone dolerites, which indicates the regional extent of the back-arc spreading processes. Study of the ontogeny and mineral inclusions in the Middle–Upper Devonian zircons from the dikes of Mount Azov showed that the formation of zircons occurred during regional metamorphism of the dolerite and hosting basalts. This metamorphism coincides with time of onset of the Late Devonian collision, when collision processes engulfed practically the entire region.
About the authors
K. S. Ivanov
Zavaritskii Institute of Geology and Geochemistry, Ural Branch, Russian Academy of Sciences
Author for correspondence.
Email: ivanovks@igg.uran.ru
Russian Federation, Yekaterinburg,
620016
S. V. Berzin
Zavaritskii Institute of Geology and Geochemistry, Ural Branch, Russian Academy of Sciences
Author for correspondence.
Email: sberzin@yandex.ru
Russian Federation, Yekaterinburg,
620016
Yu. V. Erokhin
Zavaritskii Institute of Geology and Geochemistry, Ural Branch, Russian Academy of Sciences
Email: sberzin@yandex.ru
Russian Federation, Yekaterinburg,
620016
Yu. L. Ronkin
Zavaritskii Institute of Geology and Geochemistry, Ural Branch, Russian Academy of Sciences
Email: sberzin@yandex.ru
Russian Federation, Yekaterinburg,
620016
V. V. Khiller
Zavaritskii Institute of Geology and Geochemistry, Ural Branch, Russian Academy of Sciences
Email: sberzin@yandex.ru
Russian Federation, Yekaterinburg,
620016