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- W4387097668 abstract "Abstract During the Middle Permian through the Triassic, Tasmania moved from paleo-latitudes of 78° to 69°S, wedged between Antarctica and Australia, within the paleo-South polar circle. During this time, significant global carbon cycle disturbances triggered major environmental and climatic change and mass extinction events globally. The Bicheno-5 core from Eastern Tasmania, Australia, provides the opportunity to examine Mid-Permian and Upper Triassic sediments from the paleo-Antarctic, using high-resolution organic carbon isotope (δ 13 C TOC ) chemostratigraphy, pXRF, and sedimentology, combined with new palynological data integrated with the existing radiometric age model. While there is a significant unconformity in the Upper Permian to the Middle Triassic associated with eustatic sea-level fall as a result of regional uplift in eastern Australia, three distinct carbon isotope excursions (CIEs), characterized by negative shifts of up to -6‰ were identified; the Late Permian Guadalupian Carbon Isotope Excursions (G-CIE), the Carnian Pluvial Episode (CPE), and the mid-Norian Event (MNE). These three events highlight a significant climate shift through glacial and interglacial cycles to warmer non-glacial intervals in the Late Triassic, with evidence of the polar record of the Carnian Pluvial Episode and the mid-Norian Event, which are poorly studied in the Southern Hemisphere, specifically within the Paleo-Antarctic circle. Supplementary material : A detailed chemostratigraphy data and palynomorph plate are available at https://doi.org/xxxx." @default.
- W4387097668 created "2023-09-28" @default.
- W4387097668 creator A5008804603 @default.
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- W4387097668 date "2023-09-27" @default.
- W4387097668 modified "2023-09-28" @default.
- W4387097668 title "Carbon Cycle Perturbations and Environmental Change of the Middle Permian and Late Triassic paleo-Antarctic Circle" @default.
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- W4387097668 doi "https://doi.org/10.21203/rs.3.rs-3360764/v1" @default.
- W4387097668 hasPublicationYear "2023" @default.