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

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

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

18 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number1942
JournalScientific Reports
Volume8
Issue number1
DOIs
Publication statusPublished - 1 Dec 2018

Bibliographical note

Funding Information:
The authors thank Emily Butcher for technical assistance in preparing laboratory samples, and Dominik Fahrner, Carmen Solana, and Sergio Vinciguerra for field sample collection assistance. CH is funded by the NERC Spheres Doctoral Training Partnership (grant number NE/L002574/1). PB acknowledges financial support from EU OIF contract #333588. MF acknowledges funding from a University Graduate Bursary grant. We thank two anonymous reviewers for valuable input on an earlier version of this manuscript.

Publisher Copyright:
© 2018 The Author(s).

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