Phase relations of a tephritic lava erupted at La Palma, Canary Islands, the 2nd of October 2021, during the eruption of Cumbre Vieja volcano were determined experimentally in the temperature/water content space, T (°C)/H2O (wt%). The crystallisation experiments were carried out at a fixed pressure of 275 MPa for temperatures varying from 1000 to 1200 °C and with H2O added contents ranging from 0 to 5 wt%. Results from the synthetic products are compared with those obtained from thermodynamic simulations and with the natural phases to constrain the pre-eruptive conditions of the tephritic magma stored in the shallow reservoir. The major phases (clinopyroxene + olivine + oxides) occurring in the natural products were reproduced. The experimental results combined with thermodynamic modelling allow us to constrain the pre-eruptive temperature to ∼1100 °C considering H2O to 3 wt% and to restrict the crystallisation of plagioclase at low pressures (< 20 MPa). The results indicate that, under the presence of a pure H2O fluid, amphibole is stable at pressures higher than 300 MPa and temperatures ∼1000 °C. Our results on pre-eruptive conditions of the 2021 Tajogaite eruption provide important constraints on mechanisms of storage and transport in primitive alkaline magmas.

Fabbrizio, A., Bamber, E., Michailidou, E., Romero, J., Arzilli, F., Bonechi, B., et al. (2023). Phase equilibrium experiments and thermodynamic simulations to constrain the pre-eruptive conditions of the 2021 Tajogaite eruption (Cumbre Vieja volcano, La Palma, Canary Islands). JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, 442(October 2023), 1-13 [10.1016/j.jvolgeores.2023.107901].

Phase equilibrium experiments and thermodynamic simulations to constrain the pre-eruptive conditions of the 2021 Tajogaite eruption (Cumbre Vieja volcano, La Palma, Canary Islands)

Fabbrizio, A
Primo
;
2023

Abstract

Phase relations of a tephritic lava erupted at La Palma, Canary Islands, the 2nd of October 2021, during the eruption of Cumbre Vieja volcano were determined experimentally in the temperature/water content space, T (°C)/H2O (wt%). The crystallisation experiments were carried out at a fixed pressure of 275 MPa for temperatures varying from 1000 to 1200 °C and with H2O added contents ranging from 0 to 5 wt%. Results from the synthetic products are compared with those obtained from thermodynamic simulations and with the natural phases to constrain the pre-eruptive conditions of the tephritic magma stored in the shallow reservoir. The major phases (clinopyroxene + olivine + oxides) occurring in the natural products were reproduced. The experimental results combined with thermodynamic modelling allow us to constrain the pre-eruptive temperature to ∼1100 °C considering H2O to 3 wt% and to restrict the crystallisation of plagioclase at low pressures (< 20 MPa). The results indicate that, under the presence of a pure H2O fluid, amphibole is stable at pressures higher than 300 MPa and temperatures ∼1000 °C. Our results on pre-eruptive conditions of the 2021 Tajogaite eruption provide important constraints on mechanisms of storage and transport in primitive alkaline magmas.
Articolo in rivista - Articolo scientifico
Crystallisation; Cumbre Vieja; Phase equilibrium experiments; Pre-eruptive conditions; Thermodynamic simulations; Undercooling;
English
1-set-2023
2023
442
October 2023
1
13
107901
reserved
Fabbrizio, A., Bamber, E., Michailidou, E., Romero, J., Arzilli, F., Bonechi, B., et al. (2023). Phase equilibrium experiments and thermodynamic simulations to constrain the pre-eruptive conditions of the 2021 Tajogaite eruption (Cumbre Vieja volcano, La Palma, Canary Islands). JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, 442(October 2023), 1-13 [10.1016/j.jvolgeores.2023.107901].
File in questo prodotto:
File Dimensione Formato  
Fabbrizio-2023-J Volcanol Geotherm Res-VoR.pdf

Solo gestori archivio

Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Licenza: Tutti i diritti riservati
Dimensione 5.58 MB
Formato Adobe PDF
5.58 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/457147
Citazioni
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
Social impact