Volcanism and carbon cycling in the High Arctic during the Late Jurassic – Early Cretaceous

Madeleine L. Vickers, Mads Engholm Jelby, Jennifer M. Galloway, Hamed Sanei, K.K. Sliwinska, Gregory D. Price, Clemens Vinzenz Ullmann, Iben Winther Hougård, Ivar Midtkandal, Tamsin A. Mather, Christoph Korte

Publikation: KonferencebidragAbstract ved konference

Abstrakt

Arctic carbon cycling and its regional climate have been observed to deviate from global trends in the Late Jurassic and across the Jurassic–Cretaceous boundary interval, but appear to recouple with global trends in the Early Cretaceous (Galloway et al., 2019; Jelby et al., 2020). We investigate the possible link between these observed trends and volcanism by examining the mercury (Hg) and other element records from Arctic sites in Svalbard (Norway) and the Queen Elizabeth Islands, Canada. We assess whether pulsed phases of the High Arctic Large Igneous Province, or the globally significant emplacement of Paraná-Etendeka or Greater Ontong-Java Plateau, are expressed by stratigraphic Hg trends recorded in the studied sites of Arctic Canada and Svalbard, and how any signals correlate with the regional stable carbon-isotope (δ13C) record. We compare these new data to Hg and δ13C records from other globally distributed sites, focusing on the carbon isotope excursion (CIE) intervals: the Arctic-wide Volgian CIE (“VOICE”), the global Valanginian positive CIE (“Weissert Event”), and the global early Aptian CIE associated with Ocean Anoxic Event 1a (OAE1a).
OriginalsprogEngelsk
Antal sider1
StatusUdgivet - 2021
Begivenhed EGU General Assembly 2021, virtual meeting - Virtual
Varighed: 19 apr. 202030 apr. 2021
Konferencens nummer: EGU21

Konference

Konference EGU General Assembly 2021, virtual meeting
Periode19/04/2030/04/21

Programområde

  • Programområde 5: Natur og klima

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