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Provenance of the Devonian–Carboniferous clastics of the southern part of the Prikolyma terrane (Verkhoyansk–Kolyma orogen) based on U–Pb dating of detrital zircons

dataset
posted on 2019-09-06, 12:36 authored by Andrei V. Prokopiev, Victoria B. Ershova, Daniel F. Stockli

U–Pb dating of detrital zircons collected from the Middle–Upper Palaeozoic strata of the Prikolyma terrane (Verkhoyansk–Kolyma orogen) provide the first insight into provenance areas and the Middle–Late Palaeozoic geological history of the Russian Far East. Detrital zircon ages from the Lower–Middle Devonian sandstones group around 395–405 M (Emsian–Eifelian) which correlate well to trachyte of the Uvyazka zone and the Kedon Complex of the North Okhotsk active continental margin located on the Omolon terrane. Precambrian-aged zircons group around 1740–2080 and 2460–2800 Ma, respectively, suggesting possible sources within metamorphic rocks of the basement of the Omolon terrane or the Siberian Craton. The majority of the zircons from the Lower and Upper Carboniferous sandstones group around 333–375 Ma, suggesting that the principle source of the clastics were volcanic rocks and comagmatic felsic intrusions of the Kedon Complex of the North Okhotsk active continental margin. Our new data allow us to evaluate and revise the available palaeotectonic reconstructions of northeast Asia for the Devonian and Carboniferous.

Funding

Fieldwork was performed in the framework of the research program of Diamond and Precious Metal Geology Institute (DPMGI), SB RAS [project number 0381-2019-0001]; interpretation of U-Pb data was made with the support of the Russian Science Foundation (RSF) [grant number17-17-01171], RCN project- Changes at the Top of the World through Volcanism and Plate Tectonics: A Norwegian-Russian-North American collaboration in Arctic research and education: NOR-R-AM (no. 261729). AVP and VBE were supported by Russian Foundation for Basic Research (RFBR) [grant number 19-05-00945]

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