Abstract
The complex pore space considerably affects the unique properties of diatomite and its significant potential for many industrial applications. The pore network in the diatomite from the Lower Miocene strata of the Skole nappe (the Jawornik deposit, SE Poland) has been investigated using a fractal approach. The fractal dimension of the pore-space volume was calculated using the Menger sponge as a model of a porous body and the mercury porosimetry data in a pore-throat diameter range between 10,000 and 10 nm. Based on the digital analyses of the two-dimensional images from thin sections taken under a scanning electron microscope at the backscattered electron mode at different magnifications, the authors tried to quantify the pore spaces of the diatomites using the box counting method. The results derived from the analyses of the pore-throat diameter distribution using mercury porosimetry have revealed that the pore space of the diatomite has the bifractal structure in two separated ranges of the pore-throat diameters considerably smaller than the pore-throat sizes corresponding to threshold pressures. Assuming that the fractal dimensions identified for the ranges of the smaller pore-throat diameters characterize the overall pore-throat network in the Jawornik diatomite, we can set apart the distribution of the pore-throat volume (necks) and the pore volume from the distribution of the pore-space volume (pores and necks together).
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This work was financially supported by the AGH-UST statutory grant No. 11.11.140.320.
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Stańczak, G., Rembiś, M., Figarska-Warchoł, B., Toboła, T. (2015). Fractal Characteristics of the Pore Network in Diatomites Using Mercury Porosimetry and Image Analysis. In: Polychroniadis, E., Oral, A., Ozer, M. (eds) 2nd International Multidisciplinary Microscopy and Microanalysis Congress. Springer Proceedings in Physics, vol 164. Springer, Cham. https://doi.org/10.1007/978-3-319-16919-4_11
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