Timing of global regression and microbial bloom linked with the Permian-Triassic boundary mass extinction: implications for driving mechanisms

New high-resolution U-Pb dates indicate a duration of 89 ± 38 kyr for the Permian hiatus and of 14 ± 57 kyr for the overlying Triassic microbial limestone in shallow water settings of the Nanpanjiang Basin, South China. The age and duration of the hiatus coincides with the Permian-Triassic boundary...

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Autores principales: Baresel, Björn, Bucher, Hugo, Bagherpour, Borhan, Brosse, Morgane, Guodun, Kuang, Schaltegger, Urs
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2017
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Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5338007/
https://www.ncbi.nlm.nih.gov/pubmed/28262815
http://dx.doi.org/10.1038/srep43630
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author Baresel, Björn
Bucher, Hugo
Bagherpour, Borhan
Brosse, Morgane
Guodun, Kuang
Schaltegger, Urs
author_facet Baresel, Björn
Bucher, Hugo
Bagherpour, Borhan
Brosse, Morgane
Guodun, Kuang
Schaltegger, Urs
author_sort Baresel, Björn
collection PubMed
description New high-resolution U-Pb dates indicate a duration of 89 ± 38 kyr for the Permian hiatus and of 14 ± 57 kyr for the overlying Triassic microbial limestone in shallow water settings of the Nanpanjiang Basin, South China. The age and duration of the hiatus coincides with the Permian-Triassic boundary (PTB) and the extinction interval in the Meishan Global Stratotype Section and Point, and strongly supports a glacio-eustatic regression, which best explains the genesis of the worldwide hiatus straddling the PTB in shallow water records. In adjacent deep marine troughs, rates of sediment accumulation display a six-fold decrease across the PTB compatible with a dryer and cooler climate as indicated by terrestrial plants. Our model of the Permian-Triassic boundary mass extinction (PTBME) hinges on the synchronicity of the hiatus with the onset of the Siberian Traps volcanism. This early eruptive phase released sulfur-rich volatiles into the stratosphere, thus simultaneously eliciting a short-lived ice age responsible for the global regression and a brief but intense acidification. Abrupt cooling, shrunk habitats on shelves and acidification may all have synergistically triggered the PTBME. Subsequently, the build-up of volcanic CO(2) induced a transient cool climate whose early phase saw the deposition of the microbial limestone.
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spelling pubmed-53380072017-03-08 Timing of global regression and microbial bloom linked with the Permian-Triassic boundary mass extinction: implications for driving mechanisms Baresel, Björn Bucher, Hugo Bagherpour, Borhan Brosse, Morgane Guodun, Kuang Schaltegger, Urs Sci Rep Article New high-resolution U-Pb dates indicate a duration of 89 ± 38 kyr for the Permian hiatus and of 14 ± 57 kyr for the overlying Triassic microbial limestone in shallow water settings of the Nanpanjiang Basin, South China. The age and duration of the hiatus coincides with the Permian-Triassic boundary (PTB) and the extinction interval in the Meishan Global Stratotype Section and Point, and strongly supports a glacio-eustatic regression, which best explains the genesis of the worldwide hiatus straddling the PTB in shallow water records. In adjacent deep marine troughs, rates of sediment accumulation display a six-fold decrease across the PTB compatible with a dryer and cooler climate as indicated by terrestrial plants. Our model of the Permian-Triassic boundary mass extinction (PTBME) hinges on the synchronicity of the hiatus with the onset of the Siberian Traps volcanism. This early eruptive phase released sulfur-rich volatiles into the stratosphere, thus simultaneously eliciting a short-lived ice age responsible for the global regression and a brief but intense acidification. Abrupt cooling, shrunk habitats on shelves and acidification may all have synergistically triggered the PTBME. Subsequently, the build-up of volcanic CO(2) induced a transient cool climate whose early phase saw the deposition of the microbial limestone. Nature Publishing Group 2017-03-06 /pmc/articles/PMC5338007/ /pubmed/28262815 http://dx.doi.org/10.1038/srep43630 Text en Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Baresel, Björn
Bucher, Hugo
Bagherpour, Borhan
Brosse, Morgane
Guodun, Kuang
Schaltegger, Urs
Timing of global regression and microbial bloom linked with the Permian-Triassic boundary mass extinction: implications for driving mechanisms
title Timing of global regression and microbial bloom linked with the Permian-Triassic boundary mass extinction: implications for driving mechanisms
title_full Timing of global regression and microbial bloom linked with the Permian-Triassic boundary mass extinction: implications for driving mechanisms
title_fullStr Timing of global regression and microbial bloom linked with the Permian-Triassic boundary mass extinction: implications for driving mechanisms
title_full_unstemmed Timing of global regression and microbial bloom linked with the Permian-Triassic boundary mass extinction: implications for driving mechanisms
title_short Timing of global regression and microbial bloom linked with the Permian-Triassic boundary mass extinction: implications for driving mechanisms
title_sort timing of global regression and microbial bloom linked with the permian-triassic boundary mass extinction: implications for driving mechanisms
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5338007/
https://www.ncbi.nlm.nih.gov/pubmed/28262815
http://dx.doi.org/10.1038/srep43630
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