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dc.contributor.authorMeinhold, Guido
dc.contributor.authorJensen, Sören
dc.contributor.authorHøyberget, Magne
dc.contributor.authorArslan, Arzu
dc.contributor.authorEbbestad, Jan Ove R.
dc.contributor.authorHögström, Anette
dc.contributor.authorPalacios, Teodoro
dc.contributor.authorAgic, Heda
dc.contributor.authorTaylor, Wendy L.
dc.date.accessioned2020-02-03T11:46:51Z
dc.date.available2020-02-03T11:46:51Z
dc.date.issued2019-04-10
dc.description.abstractWe report for the first time carbonates from the upper Ediacaran sedimentary succession of Finnmark, Arctic Norway. Carbonates occur as calcareous siliciclastic beds, lenses, and concretions, some with calcite spherulites and cone-in-cone (CIC) calcite, in a mudrock to fine-grained sandstone succession from approximately 3 m to 26 m above the base of the 2nd cycle of the Manndrapselva Member of the Stáhpogieddi Formation (Vestertana Group). They occur c. 40 m below the Ediacaran–Cambrian boundary, which is well defined by trace fossils. Thin-section petrography and scanning micro X-ray fluorescence elemental mapping reveal a layered composition of the calcareous sedimentary rocks. In some of those, well-developed nested cones of CIC calcite form the outer layer. Thin clay coatings outline individual cones. The inner layers are composed of (1) carbonate with calcite spherulites (grainstone) and (2) thinly laminated fine-grained calcareous siliciclastics (mudstone and wackestone) indicated by elevated concentrations of Al, Si, Fe, and Ti. The inner siliciclastic layers contain framboidal pyrite and probably organic matter. Formation of calcite spherulites took place probably at the sediment–water interface either in a coastal littoral environment or in situ in the sublittoral zone under high alkaline conditions whereas CIC calcite formed during burial diagenesis and clearly in pre-Caledonian time before metamorphism and cleavage formation. This new record of carbonates with calcite spherulites and CIC structures from the Ediacaran of Arctic Norway adds to their rare occurrences in the geological record.en_US
dc.descriptionAccepted manuscript version, licensed <a href=http://creativecommons.org/licenses/by-nc-nd/4.0/> CC BY-NC-ND 4.0. </a>en_US
dc.identifier.citationMeinhold G, Jensen S, Høyberget M, Arslan, Ebbestad JOR, Högström A, Palacios T, Agic H, Taylor WL. First record of carbonates and cone-in-cone structures from the Precambrian of Arctic Norway, and their palaeoenvironmental significance.. Precambrian Research. 2019;328:99-110en_US
dc.identifier.cristinIDFRIDAID 1691536
dc.identifier.doi10.1016/j.precamres.2019.04.014
dc.identifier.issn0301-9268
dc.identifier.issn1872-7433
dc.identifier.urihttps://hdl.handle.net/10037/17303
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalPrecambrian Research
dc.rights.accessRightsopenAccessen_US
dc.rights.holder© 2019 Elsevier B.V. All rights reserved.en_US
dc.subjectVDP::Mathematics and natural science: 400en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400en_US
dc.titleFirst record of carbonates with spherulites and cone-in-cone structures from the Precambrian of Arctic Norway, and their palaeoenvironmental significanceen_US
dc.type.versionacceptedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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