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The effects of flank collapses on volcano plumbing systems

Andrea Manconi, Marc-Antoine Longpre, Thomas R. Walter, Valentin R. Troll and Thor H. Hansteen
The effects of flank collapses on volcano plumbing systems
Geology (Boulder) (December 2009) 37 (12): 1099-1102

Abstract

The growth of large volcanoes is commonly interrupted by episodes of flank collapse that may be accompanied by catastrophic debris avalanches, explosive eruptions, and tsunamis. El Hierro, the youngest island of the Canary Archipelago, has been repeatedly affected by such mass-wasting events in the last 1 Ma. Our field observations and petrological data suggest that the largest and most recent of these flank collapses--the El Golfo landslide--likely influenced the magma plumbing system of the island, leading to the eruption of higher proportions of denser and less evolved magmas. The results of our numerical simulations indicate that the El Golfo landslide generated pressure changes exceeding 1 MPa down to upper-mantle depths, with local amplification in the surroundings and within the modeled magma plumbing system. Stress perturbations of that order might drastically alter feeding system processes, such as degassing, transport, differentiation, and mixing of magma batches.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 37
Serial Issue: 12
Title: The effects of flank collapses on volcano plumbing systems
Affiliation: GFZ German Research Centre for Geoscience, Potsdam, Federal Republic of Germany
Pages: 1099-1102
Published: 200912
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 21
Accession Number: 2010-007899
Categories: Quaternary geologyIgneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2009272
Illustration Description: illus. incl. sketch map
N27°45'00" - N27°45'00", W18°00'00" - W18°00'00"
Secondary Affiliation: Trinity College Dublin, IRL, IrelandIFM-GEOMAR, DEU, Federal Republic of Germany
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201005
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