Muller, R.D., Dutkiewicz, A., Zahirovic, S. et al. (5 more authors) (2024) Solid Earth Carbon Degassing and Sequestration Since 1 Billion Years Ago. Geochemistry, Geophysics, Geosystems, 25 (11). e2024GC011713. ISSN 1525-2027
Abstract
Solid Earth CO2 outgassing, driven by plate tectonic processes, is a key driver of carbon cycle models. However, the magnitudes and variations in outgassing are poorly constrained in deep-time. We assess plate tectonic carbon emissions and sequestration by coupling a plate tectonic model with reconstructions of oceanic plate carbon reservoirs and a thermodynamic model to quantify outfluxes from slabs and continental arcs over 1 billion years. In the early Neoproterozoic, our model predicts a peak in crustal production and net outgassing from 840 to 780 Ma that corresponds to a contemporaneous pulse in large igneous province eruptions. The Sturtian and Marinoan glaciations (717–635 Ma) correspond to a low in mid-ocean ridge outgassing, while the following Ediacaran global warming coincides with a rise in net atmospheric carbon influx, driven by an increase in plate boundary and rift length. The Cambrian, Silurian/Devonian and Triassic Jurassic hothouse climates are synchronous with a reduction in carbon sequestration flux into oceanic plates, increasing net outgassing. In contrast, the Early Cretaceous hothouse climate is accompanied by a pronounced increase in mid-ocean ridge outgassing. Both the Early Ordovician cooling and the late Paleozoic ice ages coincide with a significant decrease in net atmospheric outgassing, driven by an increase in carbon sequestration. The late Cenozoic glaciation is associated with a long-term decrease in mid-ocean ridge and rift degassing, and a pronounced increase in carbon flux into pelagic carbonate sediments. Our tectono-thermodynamic carbon cycle model provides a new foundation for future long-term climate and geochemical cycling models.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024 The Author(s). This is an open access article under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | carbon cycle, plate tectonics, thermodynamics, climate change, Neoproterozoic, Phanerozoic |
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) > Earth Surface Science Institute (ESSI) (Leeds) |
Funding Information: | Funder Grant number NERC (Natural Environment Research Council) NE/X011208/1 EU - European Union EP/Y008790/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 21 Oct 2024 08:48 |
Last Modified: | 05 Nov 2024 14:53 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1029/2024GC011713 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:218615 |