Statistical evaluation of anisotropic features embedded in the fault gouge

Eomzi Yang, Kwang Yeom Kim, Tae Sup Yun

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Despite various physio-chemical activities and complexity involved during the formation of fault gouge, it has been commonly observed that the microstructural characteristics indirectly indicates the major tectonic deformation and its consequences in the sense of geometrical analysis. This study presents the statistical investigation of internal structures embedded in fault gouges by using 3D x-ray computed tomographic images. First, the slicing plane method (SPM) quantitatively evaluates the anisotropic variation in x-ray attenuation numbers across imaginary slicing planes. The star volume method (SVD) allows inferring the preferred orientation of grains in gouges. The results of three directionally cored fault gouge specimens suggest that the maximum coefficient of variation from SPM is perpendicular to the fault plane implying that the dominant layered structures is parallel to the fault plane. The SVD reveals that the orientation of grains exists within 30 degrees of the fault plane. The observations made in this study are consistent with those in previous studies, further highlighting the feasibility of image-based analyses to understand the microstructural features of gouges.

Original languageEnglish
Title of host publication4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017
PublisherInternational Society for Rock Mechanics
Pages76-78
Number of pages3
ISBN (Electronic)9791156103158
Publication statusPublished - 2017
Event4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017 - Jeju, Korea, Republic of
Duration: 2017 May 102017 May 13

Publication series

Name4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017
Volume2017-May

Other

Other4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017
CountryKorea, Republic of
CityJeju
Period17/5/1017/5/13

Bibliographical note

Funding Information:
This work was supported by the Korea CCS R&D Center (KCRC) grant and the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2012-0008929, 2011-0030040, 2016R1A2B4011292)

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Geophysics

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