Rapid response petrology for the opening eruptive phase of the 2021 Cumbre Vieja eruption, La Palma, Canary Islands

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Matthew J. Pankhurst
https://orcid.org/0000-0001-6844-9822
Jane H. Scarrow
https://orcid.org/0000-0001-8585-8679
Olivia A. Barbee
https://orcid.org/0000-0002-5618-2371
James Hickey
https://orcid.org/0000-0002-5391-3415
Beverley C. Coldwell
https://orcid.org/0000-0001-9240-6240
Gavyn K. Rollinson
José A. Rodríguez-Losada
https://orcid.org/0000-0001-9324-0983
Alba Martín Lorenzo
Fátima Rodríguez
https://orcid.org/0000-0003-4659-7810
William Hernández
David Calvo Fernández
Pedro Hernández
https://orcid.org/0000-0003-4707-515X
Nemesio M. Pérez

Abstract

How and why magmatic systems reactivate and evolve is a critical question for monitoring and hazard mitigation efforts during initial response and ongoing volcanic crisis management. Here we report the first integrated petrological results and interpretation provided to monitoring authorities during the ongoing eruption of Cumbre Vieja, La Palma, Canary Islands, Spain. The first eruptive products comprised simultaneous Strombolian fountain-fed lava flows and tephra fall from near-continuous eruption plumes. From combined field, petrographic and geochemical analyses conducted in the 10 days following sample collection, we infer low percentage mantle melts with a variably equilibrated multimineralic crystal-cargo and compositional fractionation by winnowing during eruptive processes. Hence ‘rapid response’ petrology can untangle complex magmatic and volcanic processes for this eruption, which combined with further study and methodological improvement can increasingly assist in active decision making.

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How to Cite
Pankhurst, M. J., Scarrow, J. H., Barbee, O. A., Hickey, J., Coldwell, B. C., Rollinson, G. K., Rodríguez-Losada, J. A., Martín Lorenzo, A., Rodríguez, F., Hernández, W., Calvo Fernández, D., Hernández, P. A. . and Pérez, N. M. (2022) “Rapid response petrology for the opening eruptive phase of the 2021 Cumbre Vieja eruption, La Palma, Canary Islands”, Volcanica, 5(1), pp. 1–10. doi: 10.30909/vol.05.01.0110.
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