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A clinopyroxene-based approach to unravel temporal changes in magma plumbing beneath La Palma, Canary Islands

Alberto Caracciolo1, Teresa Ubide2, Alvaro Marquez3, Diego González-García 3, Maria Jose Huertas3, Eumenio Ancochea3, Raquel Herrera4, Nicolás Chicharro3, Juan Jesús Coello-Bravo4, Diego Perugini1, Maurizio Petrelli1

  • Affiliations:  1 University of Perugia, Department of Physics and Geology, Perugia, Italy 2The University of Queensland, School of the Environment, Brisbane, Australia. 3Universidad Complutense, Área de Petrología y Geoquímica, Madrid, Spain. 4Universidad Rey Juan Carlos, ESCET, Área de Geología, Tecvolrisk Research Group; Móstoles, Madrid, Spain. 5Fundación Telesforo Bravo - Juan Coello; Puerto de la Cruz, Tenerife, Spain. 

  • Presentation type: Poster

  • Presentation time: Thursday 16:30 - 18:30, Room Poster Hall

  • Poster Board Number: 242

  • Programme No: 1.1.28

  • Theme 1 > Session 1

Abstract

The architecture of magma plumbing systems may change over time, with significant implications for understanding volcanic behavior and improving monitoring efforts. This study focuses on clinopyroxene crystals to investigate the temporal evolution in historical times of the magma plumbing system beneath La Palma, in the Canary Islands. Samples from the 1712 El Charco eruption, the 1971 Teneguía eruption, and the 2021 Tajogaite eruption will be analysed using detailed in situ EMPA and LA-ICP-MS. These three eruptions are all characterized by the involvement of two distinct magmas: an amphibole- and pyroxene-dominated tephrite, and an olivine- and pyroxene-dominated basanite. Preliminary data on clinopyroxene cores from the 2021 Tajogaite eruption reveal three core populations, distinguished based on their textural and compositional characteristics. By characterizing the textural and geochemical characteristics of these eruptive products and using clinopyroxene-based thermobarometers, we aim to gain insights into the magmatic processes, storage conditions, and their temporal evolution underlying these eruptions.