气候变化领域集成服务门户(CCPortal): Ultrasonic Imaging of the Onset and Growth of Fractures Within Partially Saturated Whitby Mudstone Using Coda Wave Decorrelation Inversion

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DOI	10.1029/2020JB020042
	Ultrasonic Imaging of the Onset and Growth of Fractures Within Partially Saturated Whitby Mudstone Using Coda Wave Decorrelation Inversion
	Zotz-Wilson R.; Douma L.A.N.R.; Sarout J.; Dautriat J.; Dewhurst D.; Barnhoorn A.
发表日期	2020
ISSN	21699313
卷号	125 期号:7
英文摘要	Using active ultrasonic source survey data, coda wave decorrelation (CWD) time-lapse imaging during the triaxial compression of Whitby Mudstone cores provides a 3-D description of the evolution and redistribution of inelastic strain concentrations. Acoustic emissions (AEs) monitoring is also performed between any two consecutive surveys. From these data, we investigate the impact of initial water saturation Sw on the onset, growth, and reactivation of inelastic deformation, compared to the postdeformation fracture network extracted from X-ray tomography scans. Our results indicate for the applied strain rate and degree of initial water saturation, and within the frequency range of our ultrasonic transducers (0.1 to 1 MHz), that inelastic strain localization and propagation in the Whitby Mudstone does not radiate AEs of sufficient magnitude to be detected above the average noise level. This is true for both the initial onset of inelasticity (strain localization) and during macroscopic failure. In contrast, the CWD results indicate the onset of what is interpreted as localized regions of inelastic strain at less than 50% of the peak differential stress the Whitby Mudstone can sustain. The seemingly aseismic nature of these clay-rich rocks suggests the gradual development of inelastic strain, from the microscopic diffuse damage, up until the macroscopic shear failure. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	aseismic; coda wave decorrelation; imaging; inversion; mudstone; ultrasonic
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/187769
作者单位	Faculty of Civil Engineering and Geoscience, Delft University of Technology, Delft, Netherlands; CSIRO-Energy, Perth, WA, Australia
推荐引用方式 GB/T 7714	Zotz-Wilson R.,Douma L.A.N.R.,Sarout J.,et al. Ultrasonic Imaging of the Onset and Growth of Fractures Within Partially Saturated Whitby Mudstone Using Coda Wave Decorrelation Inversion[J],2020,125(7).
APA	Zotz-Wilson R.,Douma L.A.N.R.,Sarout J.,Dautriat J.,Dewhurst D.,&Barnhoorn A..(2020).Ultrasonic Imaging of the Onset and Growth of Fractures Within Partially Saturated Whitby Mudstone Using Coda Wave Decorrelation Inversion.Journal of Geophysical Research: Solid Earth,125(7).
MLA	Zotz-Wilson R.,et al."Ultrasonic Imaging of the Onset and Growth of Fractures Within Partially Saturated Whitby Mudstone Using Coda Wave Decorrelation Inversion".Journal of Geophysical Research: Solid Earth 125.7(2020).