The paleoproterozoic Kandalaksha Anorthosite Massif: New U–Pb (ID–TIMS) data and geochemical features of zircon

New U–Pb and Sm–Nd isotope data have been obtained in the Kandalaksha–Kolvitsa zone, Baltic Shield, on accessory zircon and rutile, along with whole-rock and secondary metamorphic minerals. Isotope U–Pb age of single zircon grains from metagabbro of the Kandalaksha Anorthosite Massif is 2453.5 ± 4.8...

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Published inDoklady earth sciences Vol. 477; no. 2; pp. 1454 - 1457
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.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.12.2017
Springer
Springer Nature B.V
Subjects
Anorthosite
Baltic Shield (Europe)
Cratons
Crystallization
Crystals
Data
Earth and Environmental Science
Earth Sciences
Geochemistry
Grains
Isotopes
Lead
Magma
Minerals
Rutile
Thermometry
Uranium
Zircon
Zirconium
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Summary:New U–Pb and Sm–Nd isotope data have been obtained in the Kandalaksha–Kolvitsa zone, Baltic Shield, on accessory zircon and rutile, along with whole-rock and secondary metamorphic minerals. Isotope U–Pb age of single zircon grains from metagabbro of the Kandalaksha Anorthosite Massif is 2453.5 ± 4.8 Ma, which is close to the U–Pb age of zircon from the Kolvitsa Massif metagabbro (2448 ± 5 Ma). For the first time, REEs in zircon grains of the Kandalaksha metagabbro have been analyzed and the results have been plotted. Ti-in-zircon thermometry has been applied using LA–ICP–MS: it yielded an average temperature of zircon crystallization of 844°C. The isotope and geochemical new data obtained indicate a magmatic genesis of the zircon crystals studied.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X17120194