Carbon cycle perturbations and environmental change of the middle permian and Late Triassic Paleo-Antarctic circle.
In: Scientific Reports, Jg. 14 (2024-04-28), Heft 1, S. 1-11
Online
academicJournal
Zugriff:
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 changes and mass extinction events globally. The Bicheno-5 core from Eastern Tasmania, Australia, provides the opportunity to examine middle Permian and Upper Triassic sediments from the paleo-Antarctic, using high-resolution organic carbon isotope (δ13CTOC) 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 middle 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. [ABSTRACT FROM AUTHOR]
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Carbon cycle perturbations and environmental change of the middle permian and Late Triassic Paleo-Antarctic circle.
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Autor/in / Beteiligte Person: | Lestari, Wahyuningrum ; Al-Suwaidi, Aisha ; Fox, Calum P. ; Vajda, Vivi ; Hennhoefer, Dominik |
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Zeitschrift: | Scientific Reports, Jg. 14 (2024-04-28), Heft 1, S. 1-11 |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 2045-2322 (print) |
DOI: | 10.1038/s41598-024-60088-5 |
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