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.
|Title of host publication||4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017|
|Publisher||International Society for Rock Mechanics|
|Number of pages||3|
|Publication status||Published - 2017|
|Event||4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017 - Jeju, Korea, Republic of|
Duration: 2017 May 10 → 2017 May 13
|Name||4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017|
|Other||4th ISRM Young Scholars Symposium on Rock Mechanics, YSS 2017|
|Country||Korea, Republic of|
|Period||17/5/10 → 17/5/13|
Bibliographical noteFunding 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)
© 2017 by Korean Society for Rock Mechanics.
All Science Journal Classification (ASJC) codes
- Geotechnical Engineering and Engineering Geology