Age limits of basal deposits of the Upper Cambrian section of the Polar Urals according to the results of U-PB (LA-ICP-MS) zircon dating

Cover Page

Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription Access

Abstract

Based on the results of mass U–Pb (LA-ICP-MS) dating of detrital zircon from the basal deposits of the Upper Precambrian of the Polar Urals, represented by the Nyarovei series, their lower age limit was established. The upper age boundary of the basal series was obtained from the U–Pb (LA-ICP-MS) dating of zircon from the overlying volcanogenic formations of the Nemyurugan suite. Thus, it has been established that the deposits of the Nyarovey series were formed in a narrow time interval at the end of the Late Riphean about 750–650 million years ago in the Arshinian time. Identification of the series as a Middle Riphean straton is erroneous. The dominant role in the formation of the deposits of the Nyarovey series belonged to the products of erosion of nearby massifs of crystalline rocks, fragments of which are probably polymetamorphic complexes protruding in the Harbei-Marunkeu anticlinorium in the Polar Urals.

Full Text

Restricted Access

About the authors

A. M. Pystin

N.P. Yushkin Institute of Geology, Komi Scientific Center, Ural Branch of the Russian Academy of Sciences

Author for correspondence.
Email: pystin.48@mail.ru
Russian Federation, Syktyvkar

O. V. Grakova

N.P. Yushkin Institute of Geology, Komi Scientific Center, Ural Branch of the Russian Academy of Sciences

Email: pystin.48@mail.ru
Russian Federation, Syktyvkar

Yu. I. Pystina

N.P. Yushkin Institute of Geology, Komi Scientific Center, Ural Branch of the Russian Academy of Sciences

Email: pystin.48@mail.ru
Russian Federation, Syktyvkar

V. L. Khubanov

N.L. Dobretsov Geological Institute, Siberian Branch of the Russian Academy of Sciences

Email: pystin.48@mail.ru
Russian Federation, Ulan-Ude

K. S. Popvasev

N.P. Yushkin Institute of Geology, Komi Scientific Center, Ural Branch of the Russian Academy of Sciences

Email: pystin.48@mail.ru
Russian Federation, Syktyvkar

E. V. Kushmanova

N.P. Yushkin Institute of Geology, Komi Scientific Center, Ural Branch of the Russian Academy of Sciences

Email: pystin.48@mail.ru
Russian Federation, Syktyvkar

I. L. Potapov

N.P. Yushkin Institute of Geology, Komi Scientific Center, Ural Branch of the Russian Academy of Sciences

Email: pystin.48@mail.ru
Russian Federation, Syktyvkar

References

  1. Государственная геологическая карта Российской Федерации масштаба 1:200000. Издание второе. Серия Полярно-Уральская. Лист Q-42-I, II. Объяснительная записка / Ред. А. П. Казак. СПб.: ВСЕГЕИ, 2007. 340 с.
  2. Государственная геологическая карта Российской Федерации масштаба 1: 200000. Издание второе. Серия Полярно-Уральская. Лист Q-42-VII, VIII. Объяснительная записка / Ред. А. П. Казак. СПб.: ВСЕГЕИ, 2014. 384 с.
  3. Душин В. А., Бурмако П. Л., Ронкин Ю. Л. и др. Состав и новые возрастные датировки метагабброидов малыкского комплекса на Полярном Урале // Структурно-вещественные комплексы и проблемы геодинамики докембрия фанерозойских орогенов: Матер. Межд. науч. конф. Екатеринбург: ИГГ УрО РАН, 2008. С. 27‒29.
  4. Пыстин А. М., Уляшева Н. С., Пыстина Ю. И., Гракова О. В. Источники сноса и U–Pb возраст обломочных цирконов из верхнепротерозойских отложений Полярного Урала: к вопросу о времени заложения тиманской пассивной окраины // Стратиграфия. Геологическая корреляция. 2020. Т. 28. № 5 3‒25. https://doi.org/10.31857/S0869592X20050087
  5. Стратиграфические схемы Урала (докембрий, палеозой). Екатеринбург: Уралгеолком, 1993.
  6. Хубанов В. Б., Буянтуев М. Д., Цыганков А. А. U-Pb изотопное датирование цирконов из PZ3-MZ магматических комплексов Забайкалья методом магнитно-секторной масс-спектрометрии с лазерным пробоотбором: процедура определения и сопоставление с SHRIMP данными // Геология и геофизика. 2016. Т. 57. № 1. С. 241‒258. https://doi.org/10.15372/GiG20160113
  7. Уляшева Н.С., Пыстина Ю. И., Пыстин А. М., Гракова О. В., Хубанов В. Б. Первые результаты U-Pb LA-SF-ICP-MS датирования детритовых цирконов из среднерифейских (?) терригенных отложений Полярного Урала // ДАН. 2019. Т. 485. № 4. С. 488‒492. https://doi.org/10.31857/S0869-56524854488-492
  8. Jackson S. E., Pearson N. J., Griffin W. L., Belousova E. A. The Application of Laser Ablation–inductively Coupled Plasma-mass Spectrometry to in situ U-Pb Zircon Geochronology // Chem. Geol. 2004. V. 211, P. 47‒69. https://doi.org/10.1016/j.chemgeo.2004.06.017
  9. Slama J., Košler J., Condon D. J., et al. Plešovice Zircon – A New Natural Reference Material for U-Pb and Hf Isotopic Microanalysis // Chemical Geology. 2008. V. 249(1‒2). P. 1‒35. https://doi.org/10.1016/j.chemgeo.2007.11.005
  10. Wiedenbeck M., Alle P., Corfu F., et al. (1995) Three natural zircon standards for U-Th-Pb, Lu-Hf, trace elemtnt and REE analyzes // Geostandards Newsletter. V. 19. P. 1–23. https://doi.org/10.1111/j.1751-908X.1995.tb00147.x

Supplementary files

Supplementary Files
Action
1. JATS XML
Download
2. Fig. 1. A fragment of a schematic geological map of the northwestern wing of the Harbin-Marunkeu anticlinorium (compiled using materials [1, 2]). Symbols: 1 – Upper Rifeian Nemuryugan formation; 2-3 –Upper Rifeian Nyarovian series: 2 – the Upper Riphean Miniseishor formation, 3 – the Upper Fey Upper Karbay formation; 4 – the Lower Proterozoic Khanmeikhoi formation of the Harbin metamorphic complex; 5 – the Lower Proterozoic Marunke metamorphic complex; 6 – granites, granite-gneisses; 7 – metadiorites; 8 – metagabbro, metagabbrodolerites; 9 – apogarzburgite serpentinites; 10 – contacts of geological bodies: a – stratigraphic and intrusive, b – stratigraphic and structural inconsistencies; 11 – tectonic disturbances: a – steep–falling disjunctiva, b – thrusts, sharyages; 12 - elements of occurrence of planar structures. The circle with the number shows the sampling sites: 1 – No. 4-28, 2 – MB‑9, 3 – MB‑119. The rectangle on the inset is the outline of the cx fragment

Download (1MB)
Indexing metadata
3. Fig. 2. Histograms and probability density curves of U–Pb ages of detrital zircons from terrigenous Upper- Precambrian deposits of the Polar Urals. a – according to [7]; b – our data.

Download (329KB)
Indexing metadata
4. Fig. 3. Arens-Weatherill diagram with concordia and U–Pb age (intersection method) of zircon from the metariolite of the Nemuryugan formation (sample MB‑119, N = 46).

Download (214KB)
Indexing metadata

Copyright (c) 2024 Russian Academy of Sciences

This website uses cookies

You consent to our cookies if you continue to use our website.

About Cookies