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TitleHigh-temperature combustion event spanning the Guadalupian-Lopingian boundary terminated by soil erosion
AuthorKaiho, K; Grasby, S EORCID logo; Chen, Z Q
SourcePalaeogeography, Palaeoclimatology, Palaeoecology vol. 618, 111518, 2023 p. 1-11,
Alt SeriesNatural Resources Canada, Contribution Series 20220680
PublisherElsevier B.V.
Mediapaper; digital; on-line
File formatpdf
SubjectsScience and Technology; general geology; erosion; volcanism; Pangea; Guadalupian-Lopingian boundary; Soil; Permian
Illustrationslocation maps; diagrams; cross-plots
ProgramGEM2: Geo-mapping for Energy and Minerals Western Arctic, Pearya Terrane, North Ellesmere
Released2023 05 15
AbstractA major bio-crisis in the Guadalupian-Lopingian transition (Capitanian-Wuchiapingian, middle-late Permian), possibly driven by the volatile eruption of the Emeishan large igneous province (LIP), was marked by the first-order collapse of global metazoan reefs and decline of fusulinid foraminifera, but with only minor impacts on other marine invertebrates (brachiopod, crustacea, other foraminifera). To assess the exact cause of this event, we conducted geochemical analyses of the shallow marine strata at the global stratotype section and point of the Guadalupian-Lopingian (G-L) boundary (GLB) in Laibin, South China, which corresponds to the last step of the Capitanian bio-crises during Emeishan volcanism. Here, we detect evidence for high temperature combustion of organic matter in air spanning the GLB (indicated by enriched coronene) that was terminated by a soil erosion event accompanied with terrestrial vegetation collapse at the mass extinction level (evidenced by enriched dibenzofuran) and a carbon isotope perturbation (a 2.5-3.5%0 negative shift of d13Ccarb). Molybdenum data indicates oxic seawater during the combustion event, likely reflecting regression. These findings imply that large volatile volcanic eruptions of the Emeishan LIP may have caused these environmental extreme events and mass extinctions, and that relatively lower magnitude of volcanism related to Emeishan LIP may have led to impacts on terrestrial-nearshore ecosystems.
Summary(Plain Language Summary, not published)
This paper examine the global impact of volcanos in the late Permian and compares the rock record from Arctic Canada to those in Asia. The authors use a novel geochemical tool to track volcanism developed by the GSC. Results show the signifcant global climate impact that volcanos have had in deep geologic time.

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