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TitleTellurium in late Permian-early Triassic sediments as a proxy for Siberian flood basalt volcanism
 
AuthorRegelous, M; Regelous, A; Grasby, S EORCID logo; Bond, D P G; Haase, K M; Gleißner, S; Wignall, P B
SourceGeochemistry, Geophysics, Geosystems (G3) vol. 21, issue 11, e2020GC009064, 2020 p. 1-15, https://doi.org/10.1029/2020GC009064 Open Access
logo Open Access
Image
Year2020
Alt SeriesNatural Resources Canada, Contribution Series 20200580
PublisherBlackwell Publishing Ltd.
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf; html
AreaSpitsbergen; Svalbard and Jan Mayen; Norway
Lat/Long WENS 11.5000 21.5000 80.0000 76.5000
Subjectsgeochemistry; environmental geology; mineralogy; Science and Technology; Nature and Environment; extinctions, biotic; volcanism; tellurium geochemistry; trace element geochemistry; paleogeography; thorium geochemistry; mercury geochemistry; carbon isotopes; Permo-Triassic Mass Extinction; Siberian Traps Large Igneous Province; Kapp Starostin Formation; Vardebukta Formation; Phanerozoic; Mesozoic; Triassic; Paleozoic; Permian
Illustrationslocation maps; stratigraphic columns; charts; cross-plots
ProgramGEM2: Geo-mapping for Energy and Minerals Western Arctic, Pearya Terrane, North Ellesmere
Released2020 10 31
AbstractWe measured the concentrations of trace elements in Late Permian to Early Triassic sediments from Spitsbergen. High mercury concentrations in sediments from the level of the Permo-Triassic Mass Extinction (PTME) at this location were previously attributed to the emplacement of the Siberian Traps Large Igneous Province and used to link the timing of volcanism with the record of environmental change and extinction in these sediments. We investigated the use of the moderately to highly volatile, siderophile elements Ni, Zn, Cd, Sb, Te, Re, and Tl as proxies for the intensity of Siberian volcanism. These trace elements, like Hg, have high concentrations in volcanic gas compared to crustal rocks. Tellurium is highly enriched at the PTME, and Te/Th ratios increase by a factor of ~20 across the PTME, similar to the variation in Hg/total organic carbon (TOC) in the same samples. Te/Th and Hg/TOC values imply that Siberian volcanism initiated at the onset of the PTME, coincident with the start of the d13Corganic excursion and abrupt warming. Based on Te and Hg, most Siberian volcanism occurred between the two phases of the PTME boundary (a period of less than 100 ky), but also continued into the Early Triassic. The duration of Siberian volcanism inferred from Te/Th and Hg/TOC is shorter than that indicated by recent high-precision U-Pb ages of Siberian intrusive and extrusive rocks. Te concentrations and Te/Th ratios in sediments represent a useful new proxy for volcanism, which can be used to link the marine sedimentary record with large volcanic events on land.
Summary(Plain Language Summary, not published)
This paper examines new methods to fingerprint volcanic eruptions in sedimentary records to provide enhanced control on determining sediment age to aid regional and global correlations.
GEOSCAN ID327830

 
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