Petro-mineralogical controls on coda attenuation in volcanic rock samples
- Publication type:
- Journal article
- Metadata:
-
- Autoren
- Maria Del Pilar Di Martino
- Luca De Siena
- David Healy
- Stephanie Vialle
- Autoren-URL
- https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000684117400024&DestLinkType=FullRecord&DestApp=WOS_CPL
- DOI
- 10.1093/gji/ggab198
- eISSN
- 1365-246X
- Externe Identifier
- Clarivate Analytics Document Solution ID: TY9SI
- ISSN
- 0956-540X
- Ausgabe der Veröffentlichung
- 3
- Zeitschrift
- GEOPHYSICAL JOURNAL INTERNATIONAL
- Schlüsselwörter
- Image processing
- Coda waves
- Seismic attenuation
- Wave scattering and diffraction
- Microstructures
- Paginierung
- 1858 - 1872
- Datum der Veröffentlichung
- 2021
- Status
- Published
- Titel
- Petro-mineralogical controls on coda attenuation in volcanic rock samples
- Sub types
- Article
- Ausgabe der Zeitschrift
- 226
Data source: Web of Science (Lite)
- Other metadata sources:
-
- Abstract
- <jats:title>SUMMARY</jats:title><jats:p>Seismic attenuation measurements, especially those obtained from coda decay analysis, are becoming a key data source for the characterization of the heterogeneous Earth due to their sensitivity to small-scale heterogeneities. However, the relation between the scattering attenuation measured from coda waves and physical rock properties is still unclear. The goal of this study is to identify the main petrophysical and mineralogical factors controlling coda attenuation in volcanic rocks at the laboratory scale, as a necessary step before modelling seismic waves in real volcanic media. Coda wave attenuation was estimated from ultrasonic S-wave waveforms. To quantify the heterogeneity of the rocks and link them with this attenuation parameter, we performed several categorizations of the pore and grain systems of volcanic samples. Considering that seismic attenuation in rock samples can be modelled using the framework of wave propagation in random media, a statistical analysis of shear wave velocity fluctuations was performed: this analysis gives correlation lengths ranging from 0.09 to 1.20 mm, which represents the length scale of heterogeneity in the samples. The individual evaluation of the pore space and mineral content revealed that the pores of the samples (characterized by large vesicles) have a bigger effect than the grains on the heterogeneity level. We have developed a framework where intrinsic properties of the host rocks drive seismic attenuation by correlating the petro-mineralogical characteristics obtained from image data processing and analysis, with the coda attenuation measured at ultrasonic frequencies. There is conclusive evidence that porosity alone is not the primary controller of coda attenuation: it is also changed by the alteration level (i.e. oxidation, coating of the vesicles, secondary minerals) and the size of grains and pores. Among all the parameters analysed, it appears that the pore space topology is the main contributor to scattering attenuation in the volcanic samples.</jats:p>
- Autoren
- María Del Pilar Di Martino
- Luca De Siena
- David Healy
- Stephanie Vialle
- DOI
- 10.1093/gji/ggab198
- eISSN
- 1365-246X
- ISSN
- 0956-540X
- Ausgabe der Veröffentlichung
- 3
- Zeitschrift
- Geophysical Journal International
- Sprache
- en
- Online publication date
- 2021
- Paginierung
- 1858 - 1872
- Datum der Veröffentlichung
- 2021
- Status
- Published
- Herausgeber
- Oxford University Press (OUP)
- Herausgeber URL
- http://dx.doi.org/10.1093/gji/ggab198
- Datum der Datenerfassung
- 2023
- Titel
- Petro-mineralogical controls on coda attenuation in volcanic rock samples
- Ausgabe der Zeitschrift
- 226
Data source: Crossref
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