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Geophysical Research Letters
Article . 2022 . Peer-reviewed
License: CC BY NC ND
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https://doi.org/10.25358/opens...
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License: CC BY NC ND
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Imaging the Absorbing Feeding and Eruptive Pathways of Deception Island, Antarctica

Authors: Guardo, R.; De Siena, L.; Prudencio, J.; Ventura, G.; Guardo, R.; 1 Instituto de Investigaciòn en Paleobiologìa y Geologìa (CONICET‐UNRN) General Roca Argentina; Prudencio, J.; 5 Departamento de Física Teórica y del Cosmos Universidad de Granada Granada Spain; Ventura, G.; 6 Sezione di Roma Istituto Nazionale di Geofisica e Vulcanologia Roma Italy;

Imaging the Absorbing Feeding and Eruptive Pathways of Deception Island, Antarctica

Abstract

Plain Language Summary: Deception Island is the gateway for tourists to Antarctica and a laboratory to understand ice‐capped volcanoes and their eruptions. While the Island has been the target of many geophysical studies, no clear tomographic model shows how deep eruptive pathways of its last eruptions have reached the surface in the 1960s and 1970s. This is a recurrent topic in volcano geophysics: dikes and fluid migrations develop across structures considered too small to be detected by tomographic techniques. This paper demonstrates that seismic absorption has sufficient sensitivity to temperature and fluid content to detect these pathways. Once integrated within a Geographical Information System with all the information we have on the volcano, the models resolve the feeding systems of these eruptions, from a tectonically deformed deep magma chamber to shallow cold dyke intrusions and fluid migrations still feeding the volcano today. The correlation between seismic absorption, temperature, and fluid content offers a new tool for detecting and monitoring shallow volcanic hazards.

Deception Island is one of the most active and best‐documented volcanoes in Antarctica. Since its last eruption in 1970, several geophysical surveys have targeted reconstructing its magmatic systems. However, geophysics fails to reconstruct the pathways magma and fluids follow from depth to erupt at the surface. Here, novel data selection strategies and multi‐frequency absorption inversions have been framed in a Geographical Information System, using all available geological (vents and faults distribution), geochemical and geophysical knowledge of the volcano. The result is the detection of these eruptive pathways. The model offers the first image of the magma and associated fluids pathways feed the 1967, 1969, and 1970 eruptions. Results suggest that future ascending paths might lead to active research bases and zones of planned helicopter rescue. The connection between seismic absorption, temperature, and fluid content makes it a promising attribute for detecting and monitoring eruptions at active calderas.

Key Points: High absorption detects deep eruptive pathways from the caldera center to its rim. Absorption imaging reconstructs shallow pathways of hazardous materials. Seismic absorption is sensitive to thermal anomalies at depth.

https://zenodo.org/badge/latestdoi/493744216

https://doi.org/10.5281/zenodo.6561124

Country
Argentina
Keywords

Ingeniería, Ciencia y Tecnología, DECEPTION ISLAND, seismic absorption, GEOGRAPHICAL INFORMATION SYSTEM, ddc:551, seismic tomography, Volcanology, SEISMIC ABSORPTION, 550 Geowissenschaften, remote sensing, Geophysics, 550 Earth sciences, VISUALIZATION, General Earth and Planetary Sciences, Ciencias Exactas y Naturales, Deception Island

27 references, page 1 of 3

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Ben-Zvi, T., Wilcock, W. S., Barclay, A. H., Zandomeneghi, D., Ibáñez, J. M., & Almendros, J. (2009). The P-wave velocity structure of Deception Island, Antarctica, from two-dimensional seismic tomography. Journal of Volcanology and Geothermal Research, 180(1), 67-80. https:// doi.org/10.1016/j.jvolgeores.2008.11.020

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Prudencio, J., Ibáñez, J. M., García-Yeguas, A., Del Pezzo, E., & Posadas, A. M. (2013). Spatial distribution of intrinsic and scattering seismic attenuation in active volcanic islands-II: Deception Island images. Geophysical Journal International, 195(3), 1957-1969. https://doi. org/10.1093/gji/ggt360

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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