Timing of Late Neoproterozoic glaciation in Baltica constrained by detrital zircon geochronology in the Hedmark Group, south-east Norway

Bernard Bingen*, W. L. Griffin, T. H. Torsvik, A. Saeed

*Corresponding author for this work

    Research output: Contribution to journalArticle

    73 Citations (Scopus)

    Abstract

    The Moelv Tillite is the Late Neoproterozoic Varanger glacial deposit recorded in the Hedmark Group, SE Norway. Paired U-Pb and Lu-Hf data collected on detrital zircons in the Rendalen Formation underlying the Moelv Tillite have identified an uncommon 677 ± 15 to 620 ± 14 Ma population, that constrain the deposition of the Moelv Tillite to be younger than 620 ± 14 Ma. The youngest detrital zircons may be derived from granite magmatism related to the 616 ± 3 Ma Egersund dolerite magmatism, situated in the western part of the Sveconorwegian orogen. The Moelv Tillite, which is not overlain by a cap carbonate, possibly correlates with the c. 580 Ma Squantum-Gaskiers glacial deposits of Avalonia. Available palaeomagnetic data for the Late Neoproterozoic suggest that Baltica was located at intermediate to high latitude between 620 and 555 Ma.

    Original languageEnglish
    Pages (from-to)250-258
    Number of pages9
    JournalTerra Nova
    Volume17
    Issue number3
    DOIs
    Publication statusPublished - Jun 2005

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