The influence of carbonate platform interactions with subduction zone volcanism on palaeo-atmospheric CO2 since the Devonian

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dc.citation.firstpage857en_US
dc.citation.journalTitleClimate of the Pasten_US
dc.citation.lastpage870en_US
dc.citation.volumeNumber14en_US
dc.contributor.authorPall, Jodieen_US
dc.contributor.authorZahirovic, Sabinen_US
dc.contributor.authorDoss, Sebastianoen_US
dc.contributor.authorHassan, Rakiben_US
dc.contributor.authorMatthews, Kara J.en_US
dc.contributor.authorCannon, Johnen_US
dc.contributor.authorGurnis, Michaelen_US
dc.contributor.authorMoresi, Louisen_US
dc.contributor.authorLenardic, Adrianen_US
dc.contributor.authorMüller, R. Dietmaren_US
dc.date.accessioned2018-11-01T19:40:03Zen_US
dc.date.available2018-11-01T19:40:03Zen_US
dc.date.issued2018en_US
dc.description.abstractThe CO2 liberated along subduction zones through intrusive/extrusive magmatic activity and the resulting active and diffuse outgassing influences global atmospheric CO2. However, when melts derived from subduction zones intersect buried carbonate platforms, decarbonation reactions may cause the contribution to atmospheric CO2 to be far greater than segments of the active margin that lacks buried carbon-rich rocks and carbonate platforms. This study investigates the contribution of carbonate-intersecting subduction zones (CISZs) to palaeo-atmospheric CO2 levels over the past 410 million years by integrating a plate motion and plate boundary evolution model with carbonate platform development through time. Our model of carbonate platform development has the potential to capture a broader range of degassing mechanisms than approaches that only account for continental arcs. Continuous and cross-wavelet analyses as well as wavelet coherence are used to evaluate trends between the evolving lengths of carbonate-intersecting subduction zones, non-carbonate-intersecting subduction zones and global subduction zones, and are examined for periodic, linked behaviour with the proxy CO2 record between 410Ma and the present. Wavelet analysis reveals significant linked periodic behaviour between 60 and 40Ma, when CISZ lengths are relatively high and are correlated with peaks in palaeo-atmospheric CO2, characterised by a 32–48Myr periodicity and a  ∼ 8–12Myr lag of CO2 peaks following CISZ length peaks. The linked behaviour suggests that the relative abundance of CISZs played a role in affecting global climate during the Palaeogene. In the 200–100Ma period, peaks in CISZ lengths align with peaks in palaeo-atmospheric CO2, but CISZ lengths alone cannot be determined as the cause of a warmer Cretaceous–Jurassic climate. Nevertheless, across the majority of the Phanerozoic, feedback mechanisms between the geosphere, atmosphere and biosphere likely played dominant roles in modulating climate. Our modelled subduction zone lengths and carbonate-intersecting subduction zone lengths approximate magmatic activity through time, and can be used as input into fully coupled models of CO2 flux between deep and shallow carbon reservoirs.en_US
dc.identifier.citationPall, Jodie, Zahirovic, Sabin, Doss, Sebastiano, et al.. "The influence of carbonate platform interactions with subduction zone volcanism on palaeo-atmospheric CO2 since the Devonian." <i>Climate of the Past,</i> 14, (2018) Copernicus Publications: 857-870. https://doi.org/10.5194/cp-14-857-2018.en_US
dc.identifier.doihttps://doi.org/10.5194/cp-14-857-2018en_US
dc.identifier.urihttps://hdl.handle.net/1911/103276en_US
dc.language.isoengen_US
dc.publisherCopernicus Publicationsen_US
dc.rightsThis work is distributed under the Creative Commons Attribution 4.0 License.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleThe influence of carbonate platform interactions with subduction zone volcanism on palaeo-atmospheric CO2 since the Devonianen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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