References

gtcrust

Геодинамика и тектонофизика

Geodynamics & Tectonophysics

2078-502X

Institute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch

10.5800/GT-2020-11-2-0470

gtcrust-1028

Research Article

ПАЛЕОГЕОДИНАМИКА

PALEOGEODYNAMICS

ГРАНИТЫ СЕВЕРНОГО ТИМАНА – ВЕРОЯТНЫЕ ИНДИКАТОРЫ НЕОПРОТЕРОЗОЙСКИХ ЭТАПОВ РАСПАДА РОДИНИИ

GRANITES OF THE NORTHERN TIMAN – PROBABLE INDICATORS OF NEOPROTEROZOIC STAGES OF RODINIA BREAKUP

https://orcid.org/0000-0001-9168-5268

Андреичев

В. Л.

Andreichev

V. L.

izo@geo.komisc.ru

https://orcid.org/0000-0002-3767-985X

Соболева

А. А.

Soboleva

A. A.

aa_soboleva@mail.ru

https://orcid.org/0000-0001-9956-6271

Удоратина

О. В.

Udoratina

O. V.

udoratina@geo.komisc.ru

https://orcid.org/0000-0001-8983-9483

Ронкин

Ю. Л.

Ronkin

Yu. L.

y-ronkin@mail.ru

https://orcid.org/0000-0002-7536-0559

Кобл

М. А.

Coble

M. A.

coblem@stanford.edu

https://orcid.org/0000-0002-6190-4826

Миллер

Э. Л.

Miller

E. L.

elmiller@stanford.edu

Институт геологии им. академика Н.П. Юшкина Коми НЦ УрО РАНРоссияN.P. Yushkin Institute of Geology of Komi Science Center, Ural Branch of RASRussian Federation

Институт геологии и геохимии им. академика А.Н. Заварицкого УрО РАНРоссияA.N. Zavaritsky Institute of Geology and Geochemistry, Ural Branch of RASRussian Federation

Стэнфордский университетСоединённые Штаты АмерикиStanford UniversityUnited States

2020

19062020

112201218

2020

Андреичев В.Л., Соболева А.А., Удоратина О.В., Ронкин Ю.Л., Кобл М.А., Миллер Э.Л.

Andreichev V.L., Soboleva A.A., Udoratina O.V., Ronkin Y.L., Coble M.A., Miller E.L.

Данная работа распространяется под лицензией Creative Commons Attribution 4.0.

This work is licensed under a Creative Commons Attribution 4.0 License.

https://www.gt-crust.ru/jour/article/view/1028

Северный Тиман представляет собой приподнятый блок позднедокембрийского фундамента Тиманской гряды, где неопротерозойские осадочно-метаморфические образования барминской серии прорываются интрузивными породами различного состава и перекрываются известняками нижнего силура. Для установления возраста гранитов проведено U-Pb датирование цирконов методом масс-спектрометрии вторичных ионов (SIMS), в результате чего в эволюции Северного Тимана установлено два эпизода гранитоидного магматизма. Граниты массивов Большой Камешек (613±6 млн лет) и мыса Большой Румяничный (614±11 млн лет) могли быть связаны с формированием Магматической Провинции Центрального Япетуса и фиксируют эдиакарский этап распада Родинии. Граниты массива Сопки Каменные (723‒727 млн лет) образовались в криогении и коррелируются с более ранним эпизодом распада Родинии. Они одновозрастны с Франклинской крупной магматической провинцией, существовавшей в Северной Лаврентии и, как полагают, захватывающей Южную Сибирь.

The Northern Timan is an uplifted block of Late Precambrian basement of the Timan Ridge, where Neoproterozoic sedimentary-metamorphic rocks of the Barmin Group are cut by intrusive rocks of different composition and all unconformably overlain by Lower Silurian limestone. To determine the age of granites, U-Pb dating of zircons was carried out using secondary ion mass spectrometry (SIMS). Two episodes of Neoproterozoic granite magmatism were established. Granite rocks of the Bolshoy Kameshek (613 ± 6 Ma) and Cape Bolshoy Rumyanichny (614 ± 11 Ma) plutons are interpreted to be associated with the formation of Central Iapetus Magmatic Province and record the Ediacaran stage of Rodinia breakup. The granites of the Sopki Kamennyie pluton (723‒727 Ma) formed in Cryogenian time and are assumed to represent an earlier episode of Rodinia breakup. Their ages correlate with the age of the Franklin LIP that existed in Northern Laurentia and is believed to have spread to South Siberia.

гранитыСеверный ТиманцирконU-Pb изотопный возрастРодиния

granitesNorthern TimanzirconU-Pb isotopic ageRodinia

Работа выполнена по теме госзадания ГР N АААА-А17-117121270035-0 ИГ Коми НЦ УрО РАН при частичной финансовой поддержке Комплексной программы УрО РАН (проект 18-5-5-46) и Национального научного фонда США (премии NSF по тектонике 0948673 и 16-24582 для Э. Миллер).

This study was carried out according to the state assignment of Komi Science Center, Ural Branch of RAS (No. AAAA-A17-117121270035-0 IG), with partial financial support from the Integrated Programme of the Ural Branch of RAS (Project 18-5-5-46) and the US National Science Foundation (NSF Tectonics Awards 0948673 and 1624582 to E. Miller).

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The authors declare that there are no conflicts of interest present.