Identification of materials in principal slip zones of faults by X-ray diffraction analysis using a small amount of sample

Kim, Chang-Min; Jeong, Jong Ok; Dohee, Gu; Han, Raehee

doi:10.14770/jgsk.2017.53.6.873

Cited by 5 publications

(1 citation statement)

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“…Considering the material heterogeneity and the small thickness of the PSZ and BZ materials, several samples at different places were taken. Some materials, which could be identified only in the rock slabs, were collected with a microdrill (FBS 240/E, Proxxon; Kim et al., 2017). The materials were then ground to fine powders (<5 μm in size) for 10 min using a micronizing mill (McCrone Microscopes & Accessories), and then oven‐dried at 50°C for one day.…”

Section: Methodsmentioning

confidence: 99%

Geological Records of Coseismic Shear Localization Along the Yangsan Fault, Korea

2021

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In natural fault zones, shear strain is mainly accommodated in fault rocks (or fault materials) that make up the fault core (i.e., a central high-strain zone of a brittle fault; Fossen, 2016). The shear strain may be localized in short-term and long-term scales. The long-term localization has been reported from both seismogenic and aseismic fault zones (e.g., Sibson, 2003). Seismic rupture events may repeatedly occur in a slip zone over a long period, expressed by progressive displacement of geomorphic features (e.g., Lensen, 1968). Also, aseismic fault slip may be accommodated in narrow zones of meters to decimeters in thickness (e.g., the Hayward fault; Bilham & Whitehead, 1997). Aseismic shear localization observed from statically weak faults appears to be promoted by the operation of time-dependent, fluid-assisted deformation mechanisms (e.g., dissolution-precipitation creep) in fault rocks (e.g.,

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Section: Methodsmentioning

confidence: 99%