Evidence for a spike in mantle carbon outgassing during the Ediacaran period
© 2017 The Author(s). Long-term cycles in Earth's climate are thought to be primarily controlled by changes in atmospheric CO2 concentrations. Changes in carbon emissions from volcanic activity can create an imbalance in the carbon cycle. Large-scale changes in volcanic activity have been infer...
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ftmichigantuniv:oai:digitalcommons.mtu.edu:michigantech-p-27738 2023-05-15T13:31:56+02:00 Evidence for a spike in mantle carbon outgassing during the Ediacaran period Paulsen, Timothy Deering, Chad Sliwinski, Jakub Bachmann, Olivier Guillong, Marcel 2017-12-01T08:00:00Z https://digitalcommons.mtu.edu/michigantech-p/8436 https://doi.org/10.1038/s41561-017-0011-6 unknown Digital Commons @ Michigan Tech https://digitalcommons.mtu.edu/michigantech-p/8436 https://doi.org/10.1038/s41561-017-0011-6 Michigan Tech Publications text 2017 ftmichigantuniv https://doi.org/10.1038/s41561-017-0011-6 2022-05-19T17:41:49Z © 2017 The Author(s). Long-term cycles in Earth's climate are thought to be primarily controlled by changes in atmospheric CO2 concentrations. Changes in carbon emissions from volcanic activity can create an imbalance in the carbon cycle. Large-scale changes in volcanic activity have been inferred from proxies such as the age abundance of detrital zircons, but the magnitude of carbon emissions depends on the style of volcanism as well as the amount. Here we analyse U-Pb age and trace element data of detrital zircons from Antarctica and compare the results with the global rock record. We identify a spike in CO2-rich carbonatite and alkaline magmatism during the Ediacaran period. Before the Ediacaran, secular cooling of the mantle and the advent of cooler subduction regimes promoted the sequestration of carbon derived from decarbonation of subducting oceanic slabs in the mantle. We infer that subsequent magmatism led to the extensive release of carbon that may at least in part be recorded in the Shuram-Wonoka carbon isotope excursion. We therefore suggest that this pulse of alkaline volcanism reflects a profound reorganization of the Neoproterozoic deep and surface carbon cycles and promoted planetary warming before the Cambrian radiation. Text Antarc* Antarctica Michigan Technological University: Digital Commons @ Michigan Tech Nature Geoscience 10 12 930 934 |
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Michigan Technological University: Digital Commons @ Michigan Tech |
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© 2017 The Author(s). Long-term cycles in Earth's climate are thought to be primarily controlled by changes in atmospheric CO2 concentrations. Changes in carbon emissions from volcanic activity can create an imbalance in the carbon cycle. Large-scale changes in volcanic activity have been inferred from proxies such as the age abundance of detrital zircons, but the magnitude of carbon emissions depends on the style of volcanism as well as the amount. Here we analyse U-Pb age and trace element data of detrital zircons from Antarctica and compare the results with the global rock record. We identify a spike in CO2-rich carbonatite and alkaline magmatism during the Ediacaran period. Before the Ediacaran, secular cooling of the mantle and the advent of cooler subduction regimes promoted the sequestration of carbon derived from decarbonation of subducting oceanic slabs in the mantle. We infer that subsequent magmatism led to the extensive release of carbon that may at least in part be recorded in the Shuram-Wonoka carbon isotope excursion. We therefore suggest that this pulse of alkaline volcanism reflects a profound reorganization of the Neoproterozoic deep and surface carbon cycles and promoted planetary warming before the Cambrian radiation. |
format |
Text |
author |
Paulsen, Timothy Deering, Chad Sliwinski, Jakub Bachmann, Olivier Guillong, Marcel |
spellingShingle |
Paulsen, Timothy Deering, Chad Sliwinski, Jakub Bachmann, Olivier Guillong, Marcel Evidence for a spike in mantle carbon outgassing during the Ediacaran period |
author_facet |
Paulsen, Timothy Deering, Chad Sliwinski, Jakub Bachmann, Olivier Guillong, Marcel |
author_sort |
Paulsen, Timothy |
title |
Evidence for a spike in mantle carbon outgassing during the Ediacaran period |
title_short |
Evidence for a spike in mantle carbon outgassing during the Ediacaran period |
title_full |
Evidence for a spike in mantle carbon outgassing during the Ediacaran period |
title_fullStr |
Evidence for a spike in mantle carbon outgassing during the Ediacaran period |
title_full_unstemmed |
Evidence for a spike in mantle carbon outgassing during the Ediacaran period |
title_sort |
evidence for a spike in mantle carbon outgassing during the ediacaran period |
publisher |
Digital Commons @ Michigan Tech |
publishDate |
2017 |
url |
https://digitalcommons.mtu.edu/michigantech-p/8436 https://doi.org/10.1038/s41561-017-0011-6 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Michigan Tech Publications |
op_relation |
https://digitalcommons.mtu.edu/michigantech-p/8436 https://doi.org/10.1038/s41561-017-0011-6 |
op_doi |
https://doi.org/10.1038/s41561-017-0011-6 |
container_title |
Nature Geoscience |
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10 |
container_issue |
12 |
container_start_page |
930 |
op_container_end_page |
934 |
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1766022549121007616 |