| Title | High-temperature combustion event spanning the Guadalupian-Lopingian boundary terminated by soil erosion |
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| Author | Kaiho, K; Grasby, S E ; Chen, Z Q |
| Source | Palaeogeography, Palaeoclimatology, Palaeoecology vol. 618, 111518, 2023 p. 1-11, https://doi.org/10.1016/j.palaeo.2023.111518 |
| Image |  |
| Year | 2023 |
| Alt Series | Natural Resources Canada, Contribution Series 20220680 |
| Publisher | Elsevier B.V. |
| Document | serial |
| Lang. | English |
| Media | paper; digital; on-line |
| File format | pdf |
| Subjects | Science and Technology; general geology; erosion; volcanism; Pangea; Guadalupian-Lopingian boundary; Soil; Permian |
| Illustrations | location maps; diagrams; cross-plots |
| Program | GEM2: Geo-mapping for Energy and Minerals Western Arctic, Pearya Terrane, North Ellesmere |
| Released | 2023 05 15 |
| Abstract | A 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. |
| GEOSCAN ID | 331795 |
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