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Authors: Pilar Di Martino, Maria Del
De Siena, Luca
Tisato, Nicola
Title: Pore space topology controls ultrasonic waveforms in dry volcanic rocks
Online publication date: 30-Jan-2023
Year of first publication: 2022
Language: english
Abstract: Pore space controls the mechanical and transport properties of rocks. At the laboratory scale, seismic modeling is usually performed in relatively homogeneous settings, and the influence of the pore space on the recorded wavefields is determined by rock-fluid interactions. Understanding this influence in dry rocks is instrumental for assessing the impact of pore topology on waves propagating in heterogeneous environments, such as volcanoes. Here, we simulated the propagation of shear waves as a function of pore space parameters in computational models built as proxies for volcanic rocks. The spectral-element simulations provide results comparable with ultrasonic experiments, and the outcome shows that the size, shape, volume, and location of pores impact amplitudes and phases. These variations intensify in waveform coda after multiple scattering. Our results confirm that pore topology is one of the primary regulators of the propagation of elastic waves in dry rocks regardless of porosity.
DDC: 550 Geowissenschaften
550 Earth sciences
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 09 Chemie, Pharmazie u. Geowissensch.
Place: Mainz
Version: Published version
Publication type: Zeitschriftenaufsatz
License: CC BY-NC
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Journal: Geophysical research letters
Pages or article number: e2022GL100310
Publisher: Wiley
Publisher place: Hoboken, NJ
Issue date: 2022
ISSN: 1944-8007
Publisher DOI: 10.1029/2022GL100310
Appears in collections:DFG-491381577-H

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