Early ediacaran magmatism in the yenisei ridge and evolution of the southwestern margin of the siberian craton

Antonina Vernikovskaya; Valery A. Vernikovsky; Nikolay Matushkin; Pavel Kadilnikov; Dmitry V. Metelkin; Irina Romanova; Zheng Xiang Li; Egor Bogdanov

doi:10.3390/min10060565

Early ediacaran magmatism in the yenisei ridge and evolution of the southwestern margin of the siberian craton

Antonina Vernikovskaya, Valery A. Vernikovsky, Nikolay Matushkin, Pavel Kadilnikov, Dmitry V. Metelkin, Irina Romanova, Zheng Xiang Li, Egor Bogdanov

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We present the first comprehensive data for the early Ediacaran stage of evolution of the western active continental margin of the Siberian Craton (Yenisei Ridge). U-Pb (SHRIMP-II SIMS) data for zircons from dikes of picrodolerites, quartz diorites, and leucocratic granites show that they were emplaced at 625 ± 5, 623 ± 8, and 626 ± 5 Ma, respectively, which indicates a narrow time window of Ediacaran magmatic events. The mafic tholeiitic rocks have OIB and E-MORB mantle components in their magmatic sources. Mineralogical and geochemical observations showed that the mantle-sourced mafic melts assimilated some crustal material, forming Th-enriched dikes of intermediate composition and K-and Rb-enriched felsic rocks. The possible geodynamic conditions for the formation of these early Ediacaran dikes are shown and a geodynamic model is presented for the development of the Yenisei Ridge orogen from the late Cryogenian to the late Ediacaran.

Original language	English
Article number	565
Pages (from-to)	1-23
Number of pages	23
Journal	Minerals
Volume	10
Issue number	6
DOIs	https://doi.org/10.3390/min10060565
Publication status	Published - 1 Jun 2020

Keywords

Continental margin
Dikes
Ediacaran
Magmatism
Siberian Craton
U-Pb and Ar-Ar geochronology
Yenisei Ridge

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title = "Early ediacaran magmatism in the yenisei ridge and evolution of the southwestern margin of the siberian craton",

abstract = "We present the first comprehensive data for the early Ediacaran stage of evolution of the western active continental margin of the Siberian Craton (Yenisei Ridge). U-Pb (SHRIMP-II SIMS) data for zircons from dikes of picrodolerites, quartz diorites, and leucocratic granites show that they were emplaced at 625 ± 5, 623 ± 8, and 626 ± 5 Ma, respectively, which indicates a narrow time window of Ediacaran magmatic events. The mafic tholeiitic rocks have OIB and E-MORB mantle components in their magmatic sources. Mineralogical and geochemical observations showed that the mantle-sourced mafic melts assimilated some crustal material, forming Th-enriched dikes of intermediate composition and K-and Rb-enriched felsic rocks. The possible geodynamic conditions for the formation of these early Ediacaran dikes are shown and a geodynamic model is presented for the development of the Yenisei Ridge orogen from the late Cryogenian to the late Ediacaran.",

keywords = "Continental margin, Dikes, Ediacaran, Magmatism, Siberian Craton, U-Pb and Ar-Ar geochronology, Yenisei Ridge",

author = "Antonina Vernikovskaya and Vernikovsky, {Valery A.} and Nikolay Matushkin and Pavel Kadilnikov and Metelkin, {Dmitry V.} and Irina Romanova and Li, {Zheng Xiang} and Egor Bogdanov",

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Early ediacaran magmatism in the yenisei ridge and evolution of the southwestern margin of the siberian craton. / Vernikovskaya, Antonina ; Vernikovsky, Valery A.; Matushkin, Nikolay; Kadilnikov, Pavel; Metelkin, Dmitry V.; Romanova, Irina; Li, Zheng Xiang; Bogdanov, Egor.

In: Minerals, Vol. 10, No. 6, 565, 01.06.2020, p. 1-23.

Research output: Contribution to journal › Article › peer-review

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AU - Vernikovsky, Valery A.

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AU - Kadilnikov, Pavel

AU - Metelkin, Dmitry V.

AU - Romanova, Irina

AU - Li, Zheng Xiang

AU - Bogdanov, Egor

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N2 - We present the first comprehensive data for the early Ediacaran stage of evolution of the western active continental margin of the Siberian Craton (Yenisei Ridge). U-Pb (SHRIMP-II SIMS) data for zircons from dikes of picrodolerites, quartz diorites, and leucocratic granites show that they were emplaced at 625 ± 5, 623 ± 8, and 626 ± 5 Ma, respectively, which indicates a narrow time window of Ediacaran magmatic events. The mafic tholeiitic rocks have OIB and E-MORB mantle components in their magmatic sources. Mineralogical and geochemical observations showed that the mantle-sourced mafic melts assimilated some crustal material, forming Th-enriched dikes of intermediate composition and K-and Rb-enriched felsic rocks. The possible geodynamic conditions for the formation of these early Ediacaran dikes are shown and a geodynamic model is presented for the development of the Yenisei Ridge orogen from the late Cryogenian to the late Ediacaran.

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