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Authigenic calcium carbonate precipitation in the “bathtub ring” around the anoxic Alum Shale Basin during the Furongian SPICE event (Baltic Basin, northern Poland)

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cris.lastimport.scopus2024-02-12T20:25:15Z
dc.abstract.enThe precipitation of both biotic and abiotic calcium carbonate is of great importance in modern and ancient global biogeochemical cycles. In the present-day oceans, the widespread precipitation of inorganic CaCO3 on the seafloor or in the water column is possible only under extraordinary circumstances. By contrast, in the geological record, authigenic seafloor carbonate cements were widespread in the supersaturated, anoxic oceans of the Precambrian. Widespread authigenic carbonate precipitation ceased by the end of the Neoproterozoic as a consequence of global oceanic oxygenation: in the Phanerozoic, it occurred only during major anoxic events (for example, at the Permian/Triassic boundary) or in restricted, stagnant basins. Here, we present an anomalous record of CaCO3 precipitation from the Cambrian Alum Shale Basin of the Baltica palaeocontinent with Precambrian-like authigenic, seafloor encrusting, crystalline carbonates. The depositional environment of this well-recognized, cool-water, stagnant anoxic basin favoured local carbonate precipitation via the surplus generation of alkalinity in anoxic bottom waters. However, the correlation of the acme of authigenic carbonate formation with the onset and peak of the Steptoean Positive Carbon Isotope Excursion (SPICE) suggests a driver−trigger relation between the two phenomena. On a smaller scale, carbonate authigenic precipitation is manifested by a cement-supported texture of the limestone intercalations in the Alum Shale facies. Instantaneous calcification of the faunal remains, termed here the Snedronningen phenomenon, must have been of great importance in the formation of Orsten-type Konservat Lagerstätten.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorŻylińska, Anna
dc.contributor.authorKozłowski, Wojciech
dc.contributor.authorMajchrzyk, Aleksander
dc.date.accessioned2024-01-24T16:58:59Z
dc.date.available2024-01-24T16:58:59Z
dc.date.issued2022
dc.description.financePublikacja bezkosztowa
dc.description.volume144
dc.identifier.doi10.1080/11035897.2021.1941239
dc.identifier.issn1103-5897
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/101330
dc.identifier.weblinkhttp://dx.doi.org/10.1080/11035897.2021.1941239
dc.languageeng
dc.pbn.affiliationearth and related environmental sciences
dc.relation.ispartofGFF
dc.relation.pages41-58
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enCambrian
dc.subject.enAlum Shales
dc.subject.enSPICE event
dc.subject.enauthigenic carbonates
dc.subject.enanoxia
dc.subject.encarbonate supersaturation
dc.subject.enSnedronningen phenomenon
dc.titleAuthigenic calcium carbonate precipitation in the “bathtub ring” around the anoxic Alum Shale Basin during the Furongian SPICE event (Baltic Basin, northern Poland)
dc.typeJournalArticle
dspace.entity.typePublication