Decoding links between magmatic processes and eruption dynamics: whole-rock time series petrology of the 2021 Tajogaite eruption, La Palma DOI Creative Commons
Jane H. Scarrow, Matthew J. Pankhurst, Olivia Barbee

et al.

Volcanica, Journal Year: 2024, Volume and Issue: 7(2), P. 953 - 980

Published: Dec. 28, 2024

We present an integrated petrological study of the 2021 Tajogaite eruption, La Palma, examining magmatic processes that initiated, sustained, and terminated surface volcanic activity. High temporal resolution sampling near-continuously erupted alkali-basalt lava tephra over 85-day event reveals magma plumbing system dynamics from compositional trends. Initial deposits were mineralogically varied, reflecting mobilisation shallow, evolved mush perturbed by fresh deep, primitive influx (Stage 1 - initiation). Transition to more primitive, uniform compositions recorded progressively deeper tapping pre-existing zonation 2 evacuation). The final stage 3 waning) was characterised on same fractionation trend as Stage 2, with glass suggesting a proportionately larger role interstitial melts. suggest this reflects shutdown mantle-derived supply, key process in eruption waning termination, compression-driven melt extraction less mobile Correlation geophysical monitoring data demonstrates how near-real-time could improve understanding when may end.

Language: Английский

Decoding links between magmatic processes and eruption dynamics: whole-rock time series petrology of the 2021 Tajogaite eruption, La Palma DOI Creative Commons
Jane H. Scarrow, Matthew J. Pankhurst, Olivia Barbee

et al.

Volcanica, Journal Year: 2024, Volume and Issue: 7(2), P. 953 - 980

Published: Dec. 28, 2024

We present an integrated petrological study of the 2021 Tajogaite eruption, La Palma, examining magmatic processes that initiated, sustained, and terminated surface volcanic activity. High temporal resolution sampling near-continuously erupted alkali-basalt lava tephra over 85-day event reveals magma plumbing system dynamics from compositional trends. Initial deposits were mineralogically varied, reflecting mobilisation shallow, evolved mush perturbed by fresh deep, primitive influx (Stage 1 - initiation). Transition to more primitive, uniform compositions recorded progressively deeper tapping pre-existing zonation 2 evacuation). The final stage 3 waning) was characterised on same fractionation trend as Stage 2, with glass suggesting a proportionately larger role interstitial melts. suggest this reflects shutdown mantle-derived supply, key process in eruption waning termination, compression-driven melt extraction less mobile Correlation geophysical monitoring data demonstrates how near-real-time could improve understanding when may end.

Language: Английский

Citations

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