The Paleoproterozoic Kolvitsa Anorthosite Massif: New Data on the U–Pb Age (ID TIMS) and Geochemical Features of Zircon

The rocks and minerals of the Kolvitsa massif are studied by complex isotopic–geochronological and geochemical (U–Pb, Sm–Nd, REE contents of zircons) methods. The isotopic U–Pb age (2448 ± 5 Ma) of single zircon grains, which were extracted from metagabbro of the block, is consistent with previous d...

Full description

Saved in:
Bibliographic Details
Published in:Doklady earth sciences 2018-03, Vol.479 (1), p.366-370
Main Authors: Steshenko, E. N., Nikolaev, A. I., Bayanova, T. B., Drogobuzhskaya, S. V., Chashchin, V. V., Serov, P. A., Lyalina, L. M., Novikov, A. I., Elizarov, D. V.
Format: Article
Language:English
Subjects:
Age
Anorthosite
Apatite
Crystallization
Earth and Environmental Science
Earth Sciences
Garnet
Geochemistry
Geochronology
Grains
Lead
Magma
Minerals
Radiometric dating
Rock
Rocks
Sulfides
Sulphides
Zircon
Zirconium
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The rocks and minerals of the Kolvitsa massif are studied by complex isotopic–geochronological and geochemical (U–Pb, Sm–Nd, REE contents of zircons) methods. The isotopic U–Pb age (2448 ± 5 Ma) of single zircon grains, which were extracted from metagabbro of the block, is consistent with previous data on the rocks of the Kandalaksha anorthosite block. According to Sm–Nd studies of minerals of the metamorphic complex (apatite, sulfide minerals, garnet) and rocks of the block, the age of their metamorphic transformations is 1985 ± 17 Ma. The calculated temperature of the closure of the U–Pb system and crystallization of zircon of metagabbro of the Kolvitsa massif is 778°C. The REE patterns of single zircon grains indicate their magmatic origin.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X18030224