Burton, Mike;
Aiuppa, Alessandro;
Allard, Patrick;
Asensio-Ramos, María;
Cofrades, Ana Pardo;
La Spina, Alessandro;
Nicholson, Emma J;
... Pérez, Nemesio M; + view all
(2023)
Exceptional eruptive CO_{2} emissions from intra-plate alkaline magmatism in the Canary volcanic archipelago.
Communications Earth & Environment
, 4
(1)
, Article 467. 10.1038/s43247-023-01103-x.
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Abstract
Alkaline mafic magmas forming intra-plate oceanic islands are believed to be strongly enriched in CO2 due to low-degree partial melting of enriched mantle sources. However, until now, such CO2 enhancement has not been verified by measuring CO2 degassing during a subaerial eruption. Here, we provide evidence of highly CO2-rich gas emissions during the 86-day 2021 Tajogaite eruption of Cumbre Vieja volcano on La Palma Island, in the Canary archipelago. Our results reveal sustained high plume CO2/SO2 ratios, which, when combined with SO2 fluxes, melt inclusion volatile contents and magma production rates at explosive and effusive vents, imply a magmatic CO2 content of 4.5 ± 1.5 wt%. The amount of CO2 released during the 2021 eruptive activity was 28 ± 14 Mt CO2. Extrapolating to the volume of alkaline mafic magmas forming La Palma alone (estimated as 4000 km3 erupted over 11 Ma), we infer a maximum CO2 emission into the ocean and atmosphere of 1016 moles of CO2, equivalent to 20% of the eruptive CO2 emissions from a large igneous province eruption, suggesting that the formation of the Canary volcanic archipelago produced a CO2 emission of similar magnitude as a large igneous province.
| Type: | Article |
|---|---|
| Title: | Exceptional eruptive CO_{2} emissions from intra-plate alkaline magmatism in the Canary volcanic archipelago |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/s43247-023-01103-x |
| Publisher version: | http://dx.doi.org/10.1038/s43247-023-01103-x |
| Language: | English |
| Additional information: | © 2024 Springer Nature Limited. This article is licensed under a Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/). |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10186296 |
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