Age of Granulites of the Cheremshanskaya Unit (Sharyzhalgai Uplift, Siberian Craton, Russia): New Data

S. V. Vysotskiy; A. I. Khanchuk; V. I. Levitskii; E. I. Demonterova; I. V. Levitskii; A. V. Ignatiev; T. A. Velivetskaya

doi:10.1134/S1028334X20040212

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Age of Granulites of the Cheremshanskaya Unit (Sharyzhalgai Uplift, Siberian Craton, Russia): New Data

Authors

Vysotskiy, S. V.¹
Khanchuk, A. I.¹
Levitskii, V. I.²
Demonterova, E. I.³
Levitskii, I. V.²
Ignatiev, A. V.¹
Velivetskaya, T. A.¹

¹ Far East Geological Institute, Far East Branch, Russian Academy of Sciences, Vladivostok, 690022, Russia , Vladivostok (Russia)
² Vinogradov Institute of Geochemistry, Siberian Branch, Russian Academy of Sciences, Irkutsk, 664033, Russia , Irkutsk (Russia)
³ Institute of the Earth’s Crust, Siberian Branch, Russian Academy of Sciences, Irkutsk, 664033, Russia , Irkutsk (Russia)

Type

Published Article

Journal

Doklady Earth Sciences

Publisher

Pleiades Publishing

Publication Date

Apr 01, 2020

Volume

491

Issue

2

Pages

238–242

Identifiers

DOI: 10.1134/S1028334X20040212

Source

Springer Nature

Keywords

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Abstract

AbstractThe present paper presents new U–Pb and Sm–Nd age data obtained for granulites of the Cheremshanskaya Unit enclosing metamorphosed volcano-sedimentary sulfide ores, in which sulfur isotope mass-independent fractionation (MIF–S) was established. Zircons from orthotectites that cut hosted paragranulites yielded aconcordant U–Pb age of 1866.8 ± 7.6 Ma, reflecting the final stage of granulite metamorphism. The model age (ТND (DM)) of ~3.0 Ga obtained for graphite–sulfide–cordierite (±Bt) and garnet–biotite–orthopyroxene paragneisses indicates that the protolith of sedimentary rocks was formed in the Mesoarchaean. As evidenced from various sources, the Sm–Nd isotopic characteristics of orthotectites differ from those of paragneisses.

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