Long story encrypted in a small grain – zircon from meta-andesite in the Lower Köli Nappes reveals a complex history of the Virisen Arc Terrane, Scandinavian Caledonides, Sweden

• Autorzy: Walczak Katarzyna A. , Włodek Adam , Cuthbert Simon , Carter Isabel S. M. , Ziemniak Grzegorz

Identyfikatory

DOI

10.2478/mipo-2025-0005

• Języki publikacji: EN

Abstrakty

EN

This short report presents the investigation results on the zircon from meta-andesitic rock from the Ankarede Volcanite Formation of the Lower Köli Nappe Complex in Scandinavian Caledonides. Previous U-Pb dating revealed a wide span of dates ranging from ca. 520 to ca. 480 Ma, with a mean age of 491 ± 3 Ma for the zircon cores. Using cathodoluminescence and back-scattered electron imaging, along with chemical mapping, we identified distinct zones within the zircon grains; 1) cores of clear magmatic provenance, 2) mantles also of magmatic origin but with a slightly different chemical composition and 3) zircon rims that suffered metamictisation and fluid-induced alterations. These findings highlight a complex growth history and alteration of studied zircon that affect the interpretation of zircon dating results. This research underscores the importance of detailed zircon studies for understanding the intricate processes involved in the magmatic and metamorphic evolution of Virisen terrain in Scandinavian Caledonides.

Słowa kluczowe

EN

zircon chemistry; hydrothermal alterations; meta-igneous rock; Virisen Arc; Iapetus

• Wydawca: Mineralogical Society of Poland
• Czasopismo: Mineralogia
• Rocznik: 2025
• Tom: Vol. 56, iss. 1
• Strony: 34--43
• Opis fizyczny: Bibliogr. 46 poz., rys., tab.

Twórcy

autor

Walczak Katarzyna A.

• AGH University of Krakow, Faculty of Geology, Geophysics and Environmental Protection, 30 Mickiewicza Av., 30-059 Kraków, Poland

• https://orcid.org/0000-0001-8944-1053

autor

Włodek Adam

• AGH University of Krakow, Faculty of Geology, Geophysics and Environmental Protection, 30 Mickiewicza Av., 30-059 Kraków, Poland

• https://orcid.org/0000-0002-4954-1786

autor

Cuthbert Simon

• AGH University of Krakow, Faculty of Geology, Geophysics and Environmental Protection, 30 Mickiewicza Av., 30-059 Kraków, Poland

• https://orcid.org/0000-0002-1029-6357

autor

Carter Isabel S. M.

• AGH University of Krakow, Faculty of Geology, Geophysics and Environmental Protection, 30 Mickiewicza Av., 30-059 Kraków, Poland
• Department of Earth Sciences, Uppsala University, Villavägen 16, SE-752 36 Uppsala, Sweden
• Geological Survey of Norway, Leiv Eirikssons vei 39, 7040 Trondheim, Norway

• https://orcid.org/0000-0001-7700-311X

autor

Ziemniak Grzegorz

• Institute of Geological Sciences, University of Wrocław, Pl. M. Borna 9, 50-204 Wrocław, Poland

• https://orcid.org/0000-0003-3332-4725

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).