Qiu, Z, Song, H, Hu, C et al. (2 more authors) (2019) Carbonate thermoluminescence and its implication for marine productivity change during the Permian-Triassic transition. Palaeogeography, Palaeoclimatology, Palaeoecology, 526. pp. 72-79. ISSN 0031-0182
Abstract
The Permian-Triassic (P-Tr)crisis was the largest mass extinction of the Phanerozoic and eliminated over 90% of marine species. However, the nature of marine productivity changes during the crisis is a matter of on-going debate. Here, thermoluminescence (TL)measurements from 144 bulk carbonate samples from Meishan (South China)show two levels of variation in TL peak intensities at ~270 °C. The first-order variation is characterized by a rapid, nearly three-fold increase. A secondary variation is interpreted to record periodic fluctuations on a Milankovitch scale (~20-kyr rhythm). The periodic variations of TL are negatively correlated with Mn concentrations, suggesting primary productivity is a key factor controlling the TL peak intensity by photo-reduction of particulate Mn in the presence of organic matter. Therefore, the periodic fluctuations of TL were likely controlled by primary productivity changes on orbital timescales. A significant rise of TL peak intensities across the P-Tr boundary represents the rapid increase of dissolved Mn associated with enhanced marine productivity and/or oceanic anoxia.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 Elsevier B.V. This is an author produced version of a paper published in Palaeogeography, Palaeoclimatology, Palaeoecology. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Meishan section; Permian-Triassic extinction; Dissolved Mn; Milankovitch cycle; Carbon isotope; Oceanic anoxia |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Institute for Applied Geosciences (IAG) (Leeds) |
Funding Information: | Funder Grant number NERC NE/P013724/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 26 Jun 2019 13:13 |
Last Modified: | 23 Apr 2020 00:39 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.palaeo.2019.04.021 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:147829 |