Volume and surface-area measurements using tomography, with an example from the Brenham pallasite meteorite

Spinsby, J.; Friedrich, Heiner; Buseck, Peter R.

doi:10.1016/j.cageo.2007.01.008

Cited by 10 publications

(9 citation statements)

References 13 publications

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“…The number of these interventions was kept as minimal as possible to proceed with the segmentation. For detailed information about different segmentation techniques see Malcom and Jones (2001) , Spinsby et al (2008) as well as Weber and Bookstein (2011) . Surface rendering – The 2 mm space between the segmented ammonoid slices (segmented label-fields; Fig.…”

Section: Methodsmentioning

confidence: 99%

Computed reconstruction of spatial ammonoid-shell orientation captured from digitized grinding and landmark data

Lukeneder

Weber

2014

Computers & Geosciences

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The internal orientation of fossil mass occurrences can be exploited as useful source of information about their primary depositional conditions. A series of studies, using different kinds of fossils, especially those with elongated shape (e.g., elongated gastropods), deal with their orientation and the subsequent reconstruction of the depositional conditions (e.g., paleocurrents and transport mechanisms). However, disk-shaped fossils like planispiral cephalopods or gastropods were used, up to now, with caution for interpreting paleocurrents. Moreover, most studies just deal with the topmost surface of such mass occurrences, due to the easier accessibility. Within this study, a new method for three-dimensional reconstruction of the internal structure of a fossil mass occurrence and the subsequent calculation of its spatial shell orientation is established. A 234 million-years-old (Carnian, Triassic) monospecific mass occurrence of the ammonoid Kasimlarceltites krystyni from the Taurus Mountains in Turkey, embedded in limestone, is used for this pilot study. Therefore, a 150×45×140 mm3 block of the ammonoid bearing limestone bed has been grinded to 70 slices, with a distance of 2 mm between each slice. By using a semi-automatic region growing algorithm of the 3D-visualization software Amira, ammonoids of a part of this mass occurrence were segmented and a 3D-model reconstructed. Landmarks, trigonometric and vector-based calculations were used to compute the diameters and the spatial orientation of each ammonoid. The spatial shell orientation was characterized by dip and dip-direction and aperture direction of the longitudinal axis, as well as by dip and azimuth of an imaginary sagittal-plane through each ammonoid. The exact spatial shell orientation was determined for a sample of 675 ammonoids, and their statistical orientation analyzed (i.e., NW/SE). The study combines classical orientation analysis with modern 3D-visualization techniques, and establishes a novel spatial orientation analyzing method, which can be adapted to any kind of abundant solid matter.

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Section: Methodsmentioning

confidence: 99%

Computed reconstruction of spatial ammonoid-shell orientation captured from digitized grinding and landmark data

Lukeneder

Weber

2014

Computers & Geosciences

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“…It is difficult to measure circular lengths from a discrete slice obtained by tomography. Previous studies reported some methods for measuring the circular lengths, by (1) replacing the number of objective pixels adjacent to the vacuum pixels with circular lengths, (2) replacing the vacuum pixels that are adjacent with objective pixels to circular lengths, and (3) measuring the circumference of the objects [23]. In the present study, we propose a new method for measuring such circular lengths of discrete objects.…”

Section: Error Dependence On Magnificationmentioning

confidence: 96%

“…3D morphology can be measured by quantifying such identified voxels. Using the threshold method, Spinsby et al [23] developed a new program for measuring surface area and volume. Möbus et al report on fractal dimensional measurements by calculating volume and surface area in the same way [24,25].…”

Section: Introductionmentioning

confidence: 99%

Quantification of metallic nanoparticle morphology on TiO2 using HAADF-STEM tomography

2010

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“…Traditionally, petrographic structural data of meteorites were obtained by means of the metallographic method, when sets of cut or polished slices of meteorites are used to prepare three‐dimensional (3‐D) tomography volume models (Spinsby et al. , ). Due to the rarity of pallasites, nondestructive testing methods are considered to be more attractive (Couch and Mayne ; Hezel et al.…”

Section: Introductionmentioning

confidence: 99%

“…Minor phases are troilite, schreibersite, pyroxene, and phosphates (Buseck ; Spinsby et al. ; Yang et al. ; Boesenberg et al.…”

Section: Introductionmentioning

confidence: 99%

A neutron tomography study of the Seymchan pallasite

Кичанов

Козленко

Лукин

et al. 2018

Meteorit & Planetary Scien

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The internal structure of an olivine‐rich fragment of the Seymchan meteorite was studied using neutron tomography. The differences in the neutron attenuation coefficients of constituent elements of the studied pallasite and the application of modern mathematical algorithms for a three‐dimensional (3‐D) imaging data analysis allow us to obtain a spatial distribution of different meteorite components. The heterogeneous distribution of the nickel in the metal phase was observed. In addition to the resulting 3‐D model of the Seymchan meteorite, the distributions of the volumes, average sizes, and shape‐related parameters of the FeNi metal component and olivine grains were obtained.

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Volume and surface-area measurements using tomography, with an example from the Brenham pallasite meteorite

Cited by 10 publications

References 13 publications

Computed reconstruction of spatial ammonoid-shell orientation captured from digitized grinding and landmark data

Computed reconstruction of spatial ammonoid-shell orientation captured from digitized grinding and landmark data

Quantification of metallic nanoparticle morphology on TiO2 using HAADF-STEM tomography

A neutron tomography study of the Seymchan pallasite

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