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Wykorzystanie rentgenowskiej mikrotomografii komputerowej i cyfrowej analizy obrazu do petrologicznej charakterystyki skał węglanowych

Strzelecki Piotr Jan, Fheed Adam, Radzik Natalia, Świerczewska Anna

Przegląd Geologiczny

2019

Vol. 67, nr 3

195--197

The paper briefly describes a possible application of X-ray computed microtomography studies followed by digital image analysis, enabling petrological assessment of carbonate rocks. The contribution presents an example of a complex, qualitative and quantitative approach aiming at deriving shape, geometry and spatial orientation of rock components as applied for a carbonate reservoir rock sample from the Zechstein Limestone (Ca1) strata. Apart from the basic properties of the analyzed objects, such as volume, surface area and number, detailed shape descriptors were obtained (compactness, sphericity, elongation, flatness, spareness). The presented approach allows for obtaining detailed 3D results at the microscopic scale, enabling extensive characterization of the studied material geometry. The methods proposed could be applied for other rock types as well.

Three-dimensional imaging of the Jurassic radiolarian Protunuma ? ochiensis Matsuoka : an experimental study using high-resolution X-ray micro-computed tomography

Ishida N., Kishimoto N., Matsuoka A., Kimoto K., Kurihara T., Yoshino T.

Volumina Jurassica

2015

Vol. 13, no. 1

77--82

To evaluate the utility of high-resolution micro-computed tomography (micro-CT) in observing radiolarian fossils, we examined the skeleton of the Jurassic radiolarian fossil Protunuma ? ochiensis Matsuoka using a micro-CT device. Although this species is a closed Nassellarian with a thick exterior wall, important taxonomic characters on the interior and exterior of the shell were represented almost perfectly in the acquired three-dimensional computer graphic images. These characters include those documented in the original description, such as the height and width of the skeleton, the outline, the number of segments, the pore arrangement and other features. In addition, the structure of the initial spicule of this species was revealed newly. An enlarged plaster radiolarian model printed using the laminated modelling method was useful for detailed observation. Nondestructive omnidirectional observation is an advantage of this method, which is not possible with scanning electron microscopy or optical microscopic investigations. Micro-CT technology would become an effective observational tool for radiolarian studies in the near future.