Email this article First Data on the Age and P–T Formation Conditions of Zones of Low-Angle Dip Schistosity of the Belomorian Mobile Belt
- Authors: Kozlovskiy V.M.1, Travin V.V.2, Travin A.V.3,4, Savatenkov V.M.5
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Affiliations:
- Karelian Research Center
- Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
- Sobolev Institute of Geology and Mineralogy, Siberian Branch
- National Research Tomsk State University
- Institute of Precambrian Geology and Geochronology
- Issue: Vol 480, No 1 (2018)
- Pages: 618-623
- Section: Geochemistry
- URL: https://journals.rcsi.science/1028-334X/article/view/193120
- DOI: https://doi.org/10.1134/S1028334X1805015X
- ID: 193120
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Abstract
The low-angle dip schistosity zones of the Belomorian mobile belt of northern Karelia are zones of plastic flow of thrust origin. They were formed from 1.85 to 1.90 Ga: 1879 ± 21 Ma according to 40Ar/39Ar for amphibole from amphibolites and 1857 ± 13 Ma according to the Sm–Nd isochron in amphibolites. The P–T parameters of rock metamorphism in low-angle dip schistosity zones correspond to the boundary of amphibolite and granulite facies of metamorphism: T = 640–765°C, rarely rising to 826°C; P = 8.0–11.7 kbar. The hypothesis of the two-stage Paleoproterozoic metamorphism of rocks of the Belomorian mobile belt was introduced.
About the authors
V. M. Kozlovskiy
Karelian Research Center
Author for correspondence.
Email: bazil@igem.ru
Russian Federation, Petrozavodsk, 185510
V. V. Travin
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
Email: bazil@igem.ru
Russian Federation, Moscow, 119017
A. V. Travin
Sobolev Institute of Geology and Mineralogy, Siberian Branch; National Research Tomsk State University
Email: bazil@igem.ru
Russian Federation, Novosibirsk, 630090; Tomsk, 634050
V. M. Savatenkov
Institute of Precambrian Geology and Geochronology
Email: bazil@igem.ru
Russian Federation, St. Petersburg, 199034
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