cover image: Exceptional eruptive CO 2 emissions from intra-plate alkaline magmatism in the Canary volcanic archipelago

20.500.12592/4fk8nan

Exceptional eruptive CO 2 emissions from intra-plate alkaline magmatism in the Canary volcanic archipelago

12 Dec 2023

Alkaline mafic magmas forming intra-plate oceanic islands are believed to be strongly enriched in CO 2 due to low-degree partial melting of enriched mantle sources. However, until now, such CO 2 enhancement has not been verified by measuring CO 2 degassing during a subaerial eruption. Here, we provide evidence of highly CO 2-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 CO 2 /SO 2 ratios, which, when combined with SO 2 fluxes, melt inclusion volatile contents and magma production rates at explosive and effusive vents, imply a magmatic CO 2 content of 4.5 ± 1.5 wt%. The amount of CO 2 released during the 2021 eruptive activity was 28 ± 14 Mt CO 2. Extrapolating to the volume of alkaline mafic magmas forming La Palma alone (estimated as 4000 km 3 erupted over 11 Ma), we infer a maximum CO 2 emission into the ocean and atmosphere of 10 16 moles of CO 2 , equivalent to 20% of the eruptive CO 2 emissions from a large igneous province eruption, suggesting that the formation of the Canary volcanic archipelago produced a CO 2 emission of similar magnitude as a large igneous province.

Authors

Mike Burton, Alessandro Aiuppa, Patrick Allard, María Asensio-Ramos, Ana Pardo Cofrades, Alessandro La Spina, Emma J Nicholson, Vittorio Zanon, José Barrancos, Marcello Bitetto, Margaret Hartley, Jorge E Romero, Emma Waters, Alex Stewart, Pedro A Hernández, João Pedro Lages, Eleazar Padrón, Kieran Wood, Benjamin Esse, Catherine Hayer, Klaudia Cyrzan, Estelle F Rose-Koga, Federica Schiavi, Nemesio M Pérez, Luca d'Auria

Bibliographic Reference
Mike Burton, Alessandro Aiuppa, Patrick Allard, María Asensio-Ramos, Ana Pardo Cofrades, et al.. Exceptional eruptive CO 2 emissions from intra-plate alkaline magmatism in the Canary volcanic archipelago. Communications Earth & Environment, 2023, 4 (1), pp.467. ⟨10.1038/s43247-023-01103-x⟩. ⟨hal-04337769⟩
DOI
https://doi.org/10.1038/s43247-023-01103-x
HAL Collection
Université de Clermont
HAL Identifier
4337769
Institution
['University of Manchester [Manchester]', 'Natural Environment Research Council', 'Dipartmento di Scienze della Terra e del mare,Università degli Studi di Palermo', "Institut national des sciences de l'Univers", 'Université de La Réunion', 'Institut de Physique du Globe de Paris', 'Université Paris Cité', 'INVOLCAN', 'Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Catania', 'University College London, Earth Sciences, London', 'Instituto de Investigação em Vulcanologia e Avaliação de Riscos, universidade dos Açores, Ponta Delgada', 'ITER organization', 'Instituto de Ciencias de la Ingeniería, Universidad O’Higgins, Rancagua, Chile', 'School of Geographical & Earth Sciences, University of Glasgow', 'University of Manchester, Department of Mechanical Aerospace and Civil Engineering, Manchester', 'Bureau de Recherches Géologiques et Minières (BRGM)', 'Observatoire de Paris', "Université d'Orléans", 'Institut de Recherche pour le Développement et la société', 'Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Roma']
Laboratory
['Department of Earth and Environmental Sciences, The University of Manchester', 'Centre for Observation and Modelling of Earthquakes, Volcanoes and Tectonics', 'Institut de Physique du Globe de Paris', 'Instituto Volcanológico de Canarias', 'Instituto Tecnologico de Energias Renovables', "Institut des Sciences de la Terre d'Orléans - UMR7327", 'Laboratoire Magmas et Volcans']
Published in
France

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