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High variability of interaction energy between volcanic particles: implications for deposit stability

Author

Listed:
  • Alfonso Ontiveros-Ortega

    (University of Jaén
    University of Granada)

  • Iban Plaza

    (University of Jaén)

  • Julio Calero

    (University of Jaén)

  • Jose Alberto Moleon

    (University of Jaén)

  • Jesús Miguel Ibañez

    (University of Granada
    University of Granada)

Abstract

Landslides on the flanks of stratovolcanoes can significantly modify the structure of the volcano. Macroscopic factors that determine the stability of volcanic deposits are well understood, but the microscopic interactions between particles and their impact on deposit cohesion remain poorly understood. Deposit cohesion is related to the energy of interaction between particles, and its calculation depends on the surficial properties of the eruptive materials. The purpose of this study was to perform a preliminary comparative analysis of the surficial properties of volcanic materials from various tectonic settings, including electrical (zeta potential) and thermodynamic (surface free energy) components and to calculate the total interaction energy between particles under different environmental conditions. We analyzed samples of eruptive materials obtained from volcanic flows characteristic of six active volcanoes (El Hierro, Pico Do Fogo, Vulcano, Stromboli, Mt. Etna, and Deception Island). The results show that deposit cohesion varies among volcanoes and changes drastically with the pH of the medium. Among the volcanic systems investigated, El Hierro (pH = 3) has the most cohesive materials, while Mt. Etna (pH = 8) has the least cohesive materials. Our results suggest that microscopic electrical and thermodynamic properties play a role in the stability of volcanic deposits, and confirm the need for a greater research focus in this area.

Suggested Citation

  • Alfonso Ontiveros-Ortega & Iban Plaza & Julio Calero & Jose Alberto Moleon & Jesús Miguel Ibañez, 2023. "High variability of interaction energy between volcanic particles: implications for deposit stability," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 117(3), pages 3103-3122, July.
    • Handle: RePEc:spr:nathaz:v:117:y:2023:i:3:d:10.1007_s11069-023-05979-y
    DOI: 10.1007/s11069-023-05979-y
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    References listed on IDEAS

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    1. Maria Barbano & Giovanna Pappalardo & Claudia Pirrotta & Simone Mineo, 2014. "Landslide triggers along volcanic rock slopes in eastern Sicily (Italy)," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 73(3), pages 1587-1607, September.
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