Fracture and damage localization in volcanic edifice rocks from El Hierro, Stromboli and Tenerife

Harnett, Claire E.; Benson, Philip M.; Rowley, Pete; Fazio, Marco

Abstract

© 2018 The Author(s). We present elastic wave velocity and strength data from a suite of three volcanic rocks taken from the volcanic edifices of El Hierro and Tenerife (Canary Islands, Spain), and Stromboli (Aeolian Islands, Italy). These rocks span a range of porosity and are taken from volcanoes that suffer from edifice instability. We measure elastic wave velocities at known incident angles to the generated through-going fault as a function of imposed strain, and examine the effect of the damage zone on P-wave velocity. Such data are important as field measurements of elastic wave tomography are key tools for understanding volcanic regions, yet hidden fractures are likely to have a significant effect on elastic wave velocity. We then use elastic wave velocity evolution to calculate concomitant crack density evolution which ranges from 0 to 0.17: highest values were correlated to the damage zone in rocks with the highest initial porosity.

• Journal Article Type: Article
• Acceptance Date: Jan 10, 2018
• Online Publication Date: Jan 31, 2018
• Publication Date: Jan 31, 2018
• Deposit Date: Jul 8, 2019
• Publicly Available Date: Jul 8, 2019
• Journal: Scientific Reports
• Electronic ISSN: 2045-2322
• Publisher: Nature Research (part of Springer Nature)
• Peer Reviewed: Peer Reviewed
• Volume: 8
• Article Number: 1942
• DOI: https://doi.org/10.1038/s41598-018-20442-w
• Keywords: volcanology, rock mecahnics, material physics, fracture, seismic anisotropy, seismology, experimental modelling
• Public URL: https://uwe-repository.worktribe.com/output/1494289
• Publisher URL: http://doi.org/10.1038/s41598-018-20442-w
• Additional Information: Additional Information : The final publication is available at Nature via https://doi.org/10.1038/s41598-018-20442-w
• Contract Date: Jul 8, 2019