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

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

SUBMITTER: Harnett CE 

PROVIDER: S-EPMC5792434 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature