气候变化领域集成服务门户(CCPortal): Optically Stimulated Luminescence Signal Resetting of Quartz Gouge During Subseismic to Seismic Frictional Sliding: A Case Study Using Granite-Derived Quartz

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DOI	10.1029/2020JB019900
	Optically Stimulated Luminescence Signal Resetting of Quartz Gouge During Subseismic to Seismic Frictional Sliding: A Case Study Using Granite-Derived Quartz
	Oohashi K.; Minomo Y.; Akasegawa K.; Hasebe N.; Miura K.
发表日期	2020
ISSN	21699313
卷号	125 期号:10
英文摘要	Attempts to determine the age of faulting recorded by fault rocks have been made using K–Ar, fission-track, electron spin resonance, and luminescence dating methods. Here we report the unambiguous reduction (resetting) of optically stimulated luminescence (OSL) signals of quartz gouge after friction experiments and estimate the seismological and geological conditions required for OSL signal resetting in natural fault zones. In the experiments, we used quartz sand with a particle size of <150 μm and equivalent dose of 31.5 ± 16.6 Gy. Friction experiments were conducted with a rotary-shear, high-velocity friction apparatus at slip rates (V) of 200 μm s−1 to 1.3 m s−1, normal stress of 1.0 MPa, and displacement of 10 m. In the experiments conducted under dry conditions, the OSL signal starts to decrease from V = 0.25 m s−1 and becomes near zero at V ≥ 0.65 m s−1. OSL signal resetting is also observed in the experiment sheared at 1.3 m s−1 under water-added conditions. At V = 0.25 and 0.40 m s−1, partial resetting occurs, which is characterized by coexistence of particles with and without an OSL signal. OSL signal intensity shows a strong correlation with applied power density and frictional heat during high-velocity friction, and the signal exponentially decreases with increasing power density and temperature. The power density required for partial and complete OSL signal resetting is ~0.17 and 0.6 MW m−2, respectively. Assuming a co-seismic fault slip rate of 0.6 m s−1, the depths required for partial and complete resetting are expected to be ≥11 and ≥42 m. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	fault gouge; friction experiment; frictional heat; OSL dating; Quaternary faulting
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187576
作者单位	Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi, Japan; Now at FUKKEN Co. Ltd., Hiroshima, Japan; Faculty of Science, Yamaguchi University, Yamaguchi, Japan; Now at DAIWA Exploration & Consulting Co. Ltd., Tokyo, Japan; Institute of Nature and Environmental Technology, Kanazawa University, Kanazawa, Japan
推荐引用方式 GB/T 7714	Oohashi K.,Minomo Y.,Akasegawa K.,et al. Optically Stimulated Luminescence Signal Resetting of Quartz Gouge During Subseismic to Seismic Frictional Sliding: A Case Study Using Granite-Derived Quartz[J],2020,125(10).
APA	Oohashi K.,Minomo Y.,Akasegawa K.,Hasebe N.,&Miura K..(2020).Optically Stimulated Luminescence Signal Resetting of Quartz Gouge During Subseismic to Seismic Frictional Sliding: A Case Study Using Granite-Derived Quartz.Journal of Geophysical Research: Solid Earth,125(10).
MLA	Oohashi K.,et al."Optically Stimulated Luminescence Signal Resetting of Quartz Gouge During Subseismic to Seismic Frictional Sliding: A Case Study Using Granite-Derived Quartz".Journal of Geophysical Research: Solid Earth 125.10(2020).