The first Sm–Nd isotope–geochemical data on the Paleoproterozoic age of metamorphic rocks from the crystalline basement of the Yurovsk rise (Okhotsk massif)
- Authors: Kuzmin V.K.1, Bogomolov E.S.1,2, Glebovitsky V.A.2,3
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Affiliations:
- Karpinskii Russian Geological Research Institute
- Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences
- St. Petersburg State University
- Issue: Vol 472, No 1 (2017)
- Pages: 11-15
- Section: Geology
- URL: https://journals.rcsi.science/1028-334X/article/view/189356
- DOI: https://doi.org/10.1134/S1028334X17010068
- ID: 189356
Cite item
Abstract
Rocks with Paleoproterozoic Sm–Nd model ages (TNd(DM) = 2096–2350 Ma) are the sources of protoliths with gneiss, amphibolite, marble, and calciphyre of Yurovsk rise. This fact makes possible estimation of the lower age boundary of the formation of the crystalline basement of Yurovsk rise as Paleoproterozoic. According to the results of Sm–Nd, U–Pb (SHRIMP), and Pb–Pb geochronological studies, two isotope provinces are distinguished within the crystalline basement of the Okhotsk massif. The Paleoarchean province occupies the territory of Kukhtui rise, in which crust-forming processes played a key role (3250–3650 Ma). The Paleoproterozoic province includes Yurovsk rise, in which the major stages of crust formation have an age of 1900–2350 Ma.
About the authors
V. K. Kuzmin
Karpinskii Russian Geological Research Institute
Author for correspondence.
Email: vkkuzmin@mail.ru
Russian Federation, St. Petersburg, 199106
E. S. Bogomolov
Karpinskii Russian Geological Research Institute; Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences
Email: vkkuzmin@mail.ru
Russian Federation, St. Petersburg, 199106; St. Petersburg, 199034
V. A. Glebovitsky
Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences; St. Petersburg State University
Email: vkkuzmin@mail.ru
Russian Federation, St. Petersburg, 199034; St. Petersburg, 199034