MULTIFRACTAL ANALYSIS OF SEISMICALLY INDUCED SOFT-SEDIMENT DEFORMATION STRUCTURES IMAGED BY X-RAY COMPUTED TOMOGRAPHY
作者： YOSHITO NAKASHIMA , JUNKO KOMATSUBARA
DOI: 10.1142/S0218348X18500184
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摘要: Unconsolidated soft sediments deform and mix complexly by seismically induced fluidization. Such geological soft-sediment deformation structures (SSDSs) recorded in boring cores were imaged X-ray computed tomography (CT), which enables visualization of the inhomogeneous spatial distribution iron-bearing mineral grains as strong absorbers deformed strata. Multifractal analysis was applied to two-dimensional (2D) CT images with various degrees mixing. The results show that is multifractal for less deformed/mixed strata almost monofractal fully mixed (i.e. homogenized) Computer simulations real synthetic digital performed using egg-beater flow model. successfully reproduced transformation from spectra into convergence on a single point) an increase deformation/mixing inten...
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