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

• Published in: Geophysical Research Letters
• Main Authors: Guardo, Roberto Antonino, De Siena, Luca, Prudencio, Janire, Ventura, Guido
• Language: English
• Published: Geophysical Research Letters 2022
• Subjects: Ciencias Exactas y Naturales; Ingeniería; Ciencia y Tecnología; DECEPTION ISLAND; SEISMIC ABSORPTION; GEOGRAPHICAL INFORMATION SYSTEM; VISUALIZATION; Argentina; Deception Island; Guido; Antarc*; Antarctica
• Online Access: http://rid.unrn.edu.ar/handle/20.500.12049/9485; https://hdl.handle.net/20.500.12049/9485; https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022GL099540; https://doi.org/10.1029/2022GL099540

Fil: Guardo, Roberto Antonino. Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología. Rio Negro; Argentina Fil: De Siena, Luca. Johannes Gutenberg University, TeMaS Terrestrial Magmatic Systems Research Area, Mainz, Germany Fil: Prudencio, Janire. Universidad de Granada, Departamento de Física Teórica y del Cosmos, Granada, Spain Fil: Ventura, Guido. Instituto Nazionale di Geofisica e Vulcanologia, Sezione di Roma, Roma, Italia 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. Abstract 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 ...