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Meso-Neoproterozoic Mafic Sills along the South-Eastern Margin of the Siberian Craton, SE Yakutia: Petrogenesis, Tectonic and Geochemical Features
Article

Geodynamic Emplacement Setting of Late Jurassic Dikes of the Yana–Kolyma Gold Belt, NE Folded Framing of the Siberian Craton: Geochemical, Petrologic, and U–Pb Zircon Data

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Diamond and Precious Metal Geology Institute, Siberian Branch, Russian Academy of Sciences, 677000 Yakutsk, Russia
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A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
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Department of Geology and Geophysics, Novosibirsk State University, 630090 Novosibirsk, Russia
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A.P. Karpinsky Russian Geological Research Institute, 199106 St. Petersburg, Russia
*
Author to whom correspondence should be addressed.
Minerals 2020, 10(11), 1000; https://doi.org/10.3390/min10111000
Received: 30 September 2020 / Revised: 3 November 2020 / Accepted: 8 November 2020 / Published: 11 November 2020
We present the results of geostructural, mineralogic–petrographic, geochemical, and U–Pb geochronological investigations of mafic, intermediate, and felsic igneous rocks from dikes in the Yana–Kolyma gold belt of the Verkhoyansk–Kolyma folded area (northeastern Asia). The dikes of the Vyun deposit and the Shumniy occurrence intruding Mesozoic terrigenous rocks of the Kular–Nera and Polousniy–Debin terranes were examined in detail. The dikes had diverse mineralogical and petrographic compositions including trachybasalts, andesites, trachyandesites, dacites, and granodiorites. The rocks showed significant similarities in distributions of REE, and their concentrations of most HFSEs were close to the intermediate ones between ocean islands basalts and enriched middle ocean ridge basalts. We propose that the subduction that was ongoing during the collision of the Kolyma–Omolon superterrane with Siberia led to melting in the asthenospheric wedge and in the lithosphere, which formed a mixed source for the dike systems from both an enriched and a depleted mantle source. The U–Pb SHRIMP-II dates obtained for the dikes corresponded to the Late Jurassic interval of 151–145 Ma. We present a geodynamic model for the northeastern margin of the Siberian Craton for the Tithonian age of the Late Jurassic. View Full-Text
Keywords: Siberian craton; Verkhoyansk–Kolyma folded area; dike magmatism; U–Pb zircon dating; SHRIMP II SIMS; geodynamics; Yana–Kolyma gold belt Siberian craton; Verkhoyansk–Kolyma folded area; dike magmatism; U–Pb zircon dating; SHRIMP II SIMS; geodynamics; Yana–Kolyma gold belt
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MDPI and ACS Style

Yu. Fridovsky, V.; Yakovleva, K.Y.; Vernikovskaya, A.E.; Vernikovsky, V.A.; Matushkin, N.Y.; Kadilnikov, P.I.; Rodionov, N.V. Geodynamic Emplacement Setting of Late Jurassic Dikes of the Yana–Kolyma Gold Belt, NE Folded Framing of the Siberian Craton: Geochemical, Petrologic, and U–Pb Zircon Data. Minerals 2020, 10, 1000. https://doi.org/10.3390/min10111000

AMA Style

Yu. Fridovsky V, Yakovleva KY, Vernikovskaya AE, Vernikovsky VA, Matushkin NY, Kadilnikov PI, Rodionov NV. Geodynamic Emplacement Setting of Late Jurassic Dikes of the Yana–Kolyma Gold Belt, NE Folded Framing of the Siberian Craton: Geochemical, Petrologic, and U–Pb Zircon Data. Minerals. 2020; 10(11):1000. https://doi.org/10.3390/min10111000

Chicago/Turabian Style

Yu. Fridovsky, Valery, Kyunney Y. Yakovleva, Antonina E. Vernikovskaya, Valery A. Vernikovsky, Nikolay Y. Matushkin, Pavel I. Kadilnikov, and Nickolay V. Rodionov 2020. "Geodynamic Emplacement Setting of Late Jurassic Dikes of the Yana–Kolyma Gold Belt, NE Folded Framing of the Siberian Craton: Geochemical, Petrologic, and U–Pb Zircon Data" Minerals 10, no. 11: 1000. https://doi.org/10.3390/min10111000

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