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dc.contributor.authorMeinhold, Guido
dc.contributor.authorRoberts, Nick M.W.
dc.contributor.authorArslan, Arzu
dc.contributor.authorJensen, Sören
dc.contributor.authorEbbestad, Jan Ove R.
dc.contributor.authorHögström, Anette
dc.contributor.authorHøyberget, Magne
dc.contributor.authorAgić, Heda
dc.contributor.authorPalacios, Teodoro
dc.contributor.authorTaylor, Wendy L.
dc.date.accessioned2022-06-27T07:58:13Z
dc.date.available2022-06-27T07:58:13Z
dc.date.issued2020-06-10
dc.description.abstractResults of in situ U–Pb dating of calcite spherulites, cone-in-cone (CIC) calcite and calcite fibres from a calcareous concretion of the upper Ediacaran of Finnmark, Arctic Norway, are reported. Calcite spherulites from the innermost layers of the concretion yielded a lower intercept age of 563 ± 70 Ma, which, although imprecise, is within uncertainty of the age of sedimentation based on fossil assemblages. Non-deformed CIC calcite from the bottom part of the concretion yielded an age of 475 ± 25 Ma, which is interpreted as the age of CIC calcite formation during a period of fluid overpressure induced during burial of the sediments. Deformed CIC calcite from the top part of the concretion yielded an age of 418 ± 23 Ma, which overlaps with a known Caledonian tectono-metamorphic event, and indicates a potential post-depositional overprint at this time. Calcite fibres that grew in small fissures along spherulite rims, which are interpreted as a recrystallization feature during deformation and formation of a cleavage, gave an imprecise age of 486 ± 161 Ma. Our results show that U–Pb dating of calcite can provide age constraints for ancient carbonates and syn- to post-depositional processes that operated during burial and metamorphic overprinting.en_US
dc.identifier.citationMeinhold, Roberts, Arslan, Jensen, Ebbestad, Högström A, Høyberget, Agić, Palacios, Taylor. U-Pb dating of calcite in ancient carbonates for age estimates of syn-to post-depositional processes: A case study from the upper Ediacaran strata of Finnmark, Arctic Norway. Geological Magazine. 2020;157(8):1367-1372en_US
dc.identifier.cristinIDFRIDAID 1889902
dc.identifier.doi10.1017/S0016756820000564
dc.identifier.issn0016-7568
dc.identifier.issn1469-5081
dc.identifier.urihttps://hdl.handle.net/10037/25571
dc.language.isoengen_US
dc.publisherCambridge University Pressen_US
dc.relation.journalGeological Magazine
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2020 The Author(s)en_US
dc.titleU-Pb dating of calcite in ancient carbonates for age estimates of syn-to post-depositional processes: A case study from the upper Ediacaran strata of Finnmark, Arctic Norwayen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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