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- W2079138819 abstract "Improving the characterization of buried inhomogeneities will lead to better models for predicting bottom acoustic backscattering. Sediment volume heterogeneity has been investigated using fine scale electrical resistivity data which is sensitive to porosity and sediment structure, both macro and micro. 3D electrical resistivity experiments are described where a 2D network of resistivity electrodes was used on the surface of freshly collected box cores from the Dry Tortugas, Key West. The resulting 3D resistivity data provides a unique insight into the spatial variability of sediment porosity and structure at the cm scale. Complementary X-radiograph cores provided 2D datasets of resistivity and porosity, at higher resolution. They have been used to establish the porosity-resistivity-microstructure relationships for these carbonate sediments, with microstructure being described in terms of tortuosity. These relationships have been used to extend our interpretation in terms of porosity and tortuosity to the corresponding 3D box core resistivity datasets. Sediment tortuosity has been investigated by numerically modeling the flow of electrical currents through a range of pore morphologies in three dimensions. The results show particular sensitivity to the connectivity of intra-particle porosity, particle shape and the relative sizes of pores and throats." @default.
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- W2079138819 date "1998-09-01" @default.
- W2079138819 modified "2023-09-30" @default.
- W2079138819 title "Two‐ and three‐dimensional heterogeneity in carbonate sediments using resistivity imaging" @default.
- W2079138819 doi "https://doi.org/10.1121/1.423422" @default.
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