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Mercury spikes as evidence of extended arc-volcanism around the Devonian–Carboniferous boundary in the South Tian Shan (southern Uzbekistan)

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cris.lastimport.scopus2024-02-12T19:52:17Z
dc.abstract.enRecently, the end-Devonian mass extinction (Hangenberg Crisis, 359 Ma) was identified as a first-order mass extinction, albeit not one of the “Big Five” events. Many marine and terrestrial organisms were affected by this crisis. The cause of this mass extinction is still conjectural and widely discussed. Here we report anomalously high mercury (Hg) concentrations from the South Tian Shan (Uzbekistan), together with correlation using conodont biostratigraphic data. Hg enrichment (to 5825 ppb) was detected in marine deposits encompassing the Hangenberg Crisis. In the Novchomok section, the Hangenberg Crisis interval does not contain typical Hangenberg Black Shales; however, by means of inorganic geochemistry (enrichment of redox-sensitive elements such as Mo, V, and U) we detected an equivalent level despite the lack of marked facies changes. This is the first record of Hg and Hg/total organic carbon anomalies in marly shales, marls and carbonates that are totally independent of facies changes, implying that volcanism was the most probable cause of the Hangenberg Crisis. This conclusion is confirmed by the presence of a negative δ13C excursion, which may reflect massive release of isotopically light carbon from volcanogenic and thermogenic devolatilization likely combined with increased arc-volcanism activity worldwide at the end of the Devonian.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorRakociński, Michał
dc.contributor.authorAbdiyev, Nuriddin
dc.contributor.authorCorradini, Carlo
dc.contributor.authorPisarzowska, Agnieszka
dc.contributor.authorDubicka, Zofia
dc.contributor.authorNarkiewicz, Katarzyna
dc.date.accessioned2024-01-25T11:27:10Z
dc.date.available2024-01-25T11:27:10Z
dc.date.copyright2021-03-11
dc.date.issued2021
dc.description.accesstimeAT_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number1
dc.description.versionFINAL_PUBLISHED
dc.description.volume11
dc.identifier.doi10.1038/S41598-021-85043-6
dc.identifier.issn2045-2322
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/112288
dc.identifier.weblinkhttp://www.nature.com/articles/s41598-021-85043-6.pdf
dc.languageeng
dc.pbn.affiliationearth and related environmental sciences
dc.relation.ispartofScientific Reports
dc.relation.pages1-15
dc.rightsCC-BY
dc.sciencecloudnosend
dc.titleMercury spikes as evidence of extended arc-volcanism around the Devonian–Carboniferous boundary in the South Tian Shan (southern Uzbekistan)
dc.typeJournalArticle
dspace.entity.typePublication