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Linking eruptive style with pore network geometry in tephritic/basanitic tephra from the 2021 Tajogaite eruption (Canary Islands, Spain).

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Title: Linking eruptive style with pore network geometry in tephritic/basanitic tephra from the 2021 Tajogaite eruption (Canary Islands, Spain).
Authors: Bonechi, Barbara1 (AUTHOR) barbara.bonechi@manchester.ac.uk, Bamber, Emily C.2 (AUTHOR), Polacci, Margherita1 (AUTHOR), Arzilli, Fabio3 (AUTHOR), La Spina, Giuseppe4 (AUTHOR), Biagioli, Elisa1 (AUTHOR), Romero, Jorge E.5 (AUTHOR), Hazemann, Jean-Louis6 (AUTHOR), Brooker, Richard7 (AUTHOR), Atwood, Robert8 (AUTHOR), Burton, Mike1 (AUTHOR)
Source: Bulletin of Volcanology. Jun2025, Vol. 87 Issue 6, p1-18. 18p.
Subject Terms: *X-ray computed microtomography, *Magmas, *Volcanic ash, tuff, etc., *Outgassing, *Fountains
Abstract: Investigating the textural properties and 3D geometry of the connected pore network in volcanic products provides insight into magma ascent processes, due to their influence on magma permeability, outgassing efficiency and explosivity. Here, we used X-ray computed microtomography to investigate vesicle textures in tephra from the 2021 Tajogaite eruption (La Palma, Spain) and the relationship between these pore network parameters and eruptive style. We report a 3D dataset of pore network parameters for lapilli clasts collected throughout the eruption, associated with different eruptive styles (ash-rich jets, lava fountains, Strombolian activity). In clasts from Strombolian activity, the lower vesicle number density (VND) and tortuosity factor (m) suggests that there are fewer vesicles and that the channels which connect them are less tortuous than in clasts from fountain and ash-rich jet activity, favouring a lower degree of gas–melt coupling and thus, more efficient outgassing. Instead, for clasts of lava fountain and ash-rich jet activity, the higher VND and m suggest a higher number of vesicles connected by more tortuous channels, promoting some degree of gas–melt coupling and thus, less efficient outgassing. However, in clasts from ash-rich jets, the presence of narrower channels, as suggested by the lower throat-pore size ratio, favours a greater degree of gas–melt coupling with respect to fountain activity, leading to magma fragmentation. This work highlights the importance of textural and pore network analyses in understanding eruption dynamics, and provides a case study for investigating the interplay between pore network parameters, magma permeability and ascent dynamics for low-viscosity magmas. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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  Data: Linking eruptive style with pore network geometry in tephritic/basanitic tephra from the 2021 Tajogaite eruption (Canary Islands, Spain).
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  Data: <searchLink fieldCode="AR" term="%22Bonechi%2C+Barbara%22">Bonechi, Barbara</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> barbara.bonechi@manchester.ac.uk</i><br /><searchLink fieldCode="AR" term="%22Bamber%2C+Emily+C%2E%22">Bamber, Emily C.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Polacci%2C+Margherita%22">Polacci, Margherita</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Arzilli%2C+Fabio%22">Arzilli, Fabio</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22La+Spina%2C+Giuseppe%22">La Spina, Giuseppe</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Biagioli%2C+Elisa%22">Biagioli, Elisa</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Romero%2C+Jorge+E%2E%22">Romero, Jorge E.</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hazemann%2C+Jean-Louis%22">Hazemann, Jean-Louis</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Brooker%2C+Richard%22">Brooker, Richard</searchLink><relatesTo>7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Atwood%2C+Robert%22">Atwood, Robert</searchLink><relatesTo>8</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Burton%2C+Mike%22">Burton, Mike</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Bulletin+of+Volcanology%22">Bulletin of Volcanology</searchLink>. Jun2025, Vol. 87 Issue 6, p1-18. 18p.
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  Data: *<searchLink fieldCode="DE" term="%22X-ray+computed+microtomography%22">X-ray computed microtomography</searchLink><br />*<searchLink fieldCode="DE" term="%22Magmas%22">Magmas</searchLink><br />*<searchLink fieldCode="DE" term="%22Volcanic+ash%2C+tuff%2C+etc%2E%22">Volcanic ash, tuff, etc.</searchLink><br />*<searchLink fieldCode="DE" term="%22Outgassing%22">Outgassing</searchLink><br />*<searchLink fieldCode="DE" term="%22Fountains%22">Fountains</searchLink>
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  Label: Abstract
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  Data: Investigating the textural properties and 3D geometry of the connected pore network in volcanic products provides insight into magma ascent processes, due to their influence on magma permeability, outgassing efficiency and explosivity. Here, we used X-ray computed microtomography to investigate vesicle textures in tephra from the 2021 Tajogaite eruption (La Palma, Spain) and the relationship between these pore network parameters and eruptive style. We report a 3D dataset of pore network parameters for lapilli clasts collected throughout the eruption, associated with different eruptive styles (ash-rich jets, lava fountains, Strombolian activity). In clasts from Strombolian activity, the lower vesicle number density (VND) and tortuosity factor (m) suggests that there are fewer vesicles and that the channels which connect them are less tortuous than in clasts from fountain and ash-rich jet activity, favouring a lower degree of gas–melt coupling and thus, more efficient outgassing. Instead, for clasts of lava fountain and ash-rich jet activity, the higher VND and m suggest a higher number of vesicles connected by more tortuous channels, promoting some degree of gas–melt coupling and thus, less efficient outgassing. However, in clasts from ash-rich jets, the presence of narrower channels, as suggested by the lower throat-pore size ratio, favours a greater degree of gas–melt coupling with respect to fountain activity, leading to magma fragmentation. This work highlights the importance of textural and pore network analyses in understanding eruption dynamics, and provides a case study for investigating the interplay between pore network parameters, magma permeability and ascent dynamics for low-viscosity magmas. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=186046483
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        Value: 10.1007/s00445-025-01833-0
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        Text: English
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      – SubjectFull: X-ray computed microtomography
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      – SubjectFull: Magmas
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      – SubjectFull: Volcanic ash, tuff, etc.
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      – SubjectFull: Outgassing
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      – TitleFull: Linking eruptive style with pore network geometry in tephritic/basanitic tephra from the 2021 Tajogaite eruption (Canary Islands, Spain).
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              M: 06
              Text: Jun2025
              Type: published
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