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X-ray tomography

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Journal Article
Journal: AAPG Bulletin
Published: 01 August 2016
AAPG Bulletin (2016) 100 (8): 1289-1309.
.... Furthermore, although conventional measurements of capillary pressure can be used to determine pore-throat diameter, they do not provide spatial information on the distribution of those pore throats nor the coordination number. However, 3-D images from x-ray tomography can be used to determine...
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Journal Article
Journal: Geosphere
Published: 01 December 2013
Geosphere (2013) 9 (6): 1704-1713.
...Ayla S. Pamukcu; Guilherme A.R. Gualda; Mark L. Rivers Abstract Textures (sizes, shapes, distributions) of glass inclusions in crystals can provide important insight into magmatic processes. Three-dimensional X-ray tomography is an excellent nondestructive method for assessing igneous rock textures...
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Journal Article
Journal: Geosphere
Published: 01 December 2010
Geosphere (2010) 6 (6): 782-792.
... that differential absorption X-ray tomography can be used to yield three-dimensional maps of selected elements, particularly Zr and rare earth elements (REE), making it possible to qualitatively and quantitatively document the textures of zircon and REE minerals in situ and in three dimensions. We apply this method...
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Journal Article
Journal: Geophysics
Published: 29 March 2019
Geophysics (2019) 84 (3): E173-E188.
... for the SIP data interpretation. Therefore, experimental data of SIP signals directly associated with different NAPL distributions are needed. We used high-resolution X-ray tomography and 3D image processing to quantitatively assess NAPL distributions in samples of fine-grained sand containing different...
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Journal Article
Journal: Geology
Published: 23 February 2018
Geology (2018) 46 (5): 387-390.
... sparse. Here we present some three-dimensionally (3-D) phosphatized Archaeooides from the basal Cambrian in southern Shaanxi Province, China. The 3-D reconstructions of a number of specimens, aided by high-resolution X-ray tomography, demonstrate that these soft-bodied fossil organisms have a thick cyst...
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Journal Article
Published: 01 March 2017
American Mineralogist (2017) 102 (3): 620-631.
... during scanning electron microscopy (SEM) and high-resolution X-ray tomography (micro-CT) analyses. The statistical procedure was tested in methane-derived carbonate pipes recovered in the Gulf of Cadiz. These samples contain abundant pyrite together with pseudomorph iron oxyhydroxides showing multiple...
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Series: Geological Society, London, Special Publications
Published: 01 January 2015
DOI: 10.1144/SP406.12
EISBN: 9781862396838
... We investigated the heterogeneity of porosity from reefal carbonate rocks across multiple scales (from the pore to centimetre scale) using X-ray micro-tomography. Compared to standard direct measurements of porosity and permeability on core samples, the non-invasive 3D imaging...
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Journal Article
Journal: Geosphere
Published: 01 December 2010
Geosphere (2010) 6 (6): 775-781.
...Ayla S. Pamukcu; Guilherme A.R. Gualda Abstract X-ray tomography is a nondestructive technique that can be used to study rocks and other materials in three dimensions over a wide range of sizes. Samples that range from decimeters to micrometers in size can be analyzed, and micrometer- to centimeter...
FIGURES
Journal Article
Published: 01 November 2005
American Mineralogist (2005) 90 (11-12): ea1-ea17.
...Cameron R. Huddlestone-Holmes; Richard A. Ketcham Abstract This study demonstrates how high-resolution X-ray computed tomography can be used to determine the geometry of curved inclusion trails in garnet porphyroblasts. For the first time, the three-dimensional geometry of these features is shown...
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Journal Article
Journal: Geology
Published: 01 November 1991
Geology (1991) 19 (11): 1063-1067.
...Bernard Colletta; Jean Letouzey; Roberto Pinedo; Jean François Ballard; Pascal Balé Abstract Computerized X-ray tomography applied to analog sandbox experiments performed in a normal gravity field makes possible the analysis of the kinematic evolution, as well as the three-dimensional geometry...
Journal Article
Journal: Geosphere
Published: 01 August 2008
Geosphere (2008) 4 (4): 760-763.
...Robert P. Speijer; Denis Van Loo; Bert Masschaele; Jelle Vlassenbroeck; Veerle Cnudde; Patric Jacobs Abstract The latest generation of high-resolution X-ray computed tomography (HRXCT), with a submicron resolution, enables for the first time three-dimensional (3D) imaging and biometric...
FIGURES
Series: Geological Society, London, Special Publications
Published: 01 January 2014
DOI: 10.1144/SP391.9
EISBN: 9781862396678
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Image
<b>X</b>-<b>ray</b> <b>tomography</b> setup at the Ghent University Centre for <b>X</b>-<b>ray</b> <b>Tomography</b> ...
Published: 01 January 2015
Figure 3. X-ray tomography setup at the Ghent University Centre for X-ray Tomography for imaging analog caldera models. 1—X-ray beam source; 2—plastic stand with central perforation and outlet; 3—plastic cylindrical container; 4—sand-and-plaster mix; 5—thin garnet sand intercalations; 6—golden
Journal Article
Published: 01 November 2018
American Mineralogist (2018) 103 (11): 1800-1811.
...;1.0%. X-ray tomography can now provide fully integrated textural and chemical analysis of natural samples containing olivine, which will support 3D and 3D+time petrologic modeling. The study has revealed >3 mm domains within a large crystal of San Carlos forsterite that varies by ∼2 Fo mol...
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Series: Geological Society, London, Special Publications
Published: 01 January 2003
DOI: 10.1144/GSL.SP.2003.215.01.19
EISBN: 9781862394636
... Abstract An industrial X-ray computed tomography (CT) system was used for the study of sedimentary and deformation structures in weakly consolidated late Pleistocene and Holocene lake sediments. CT analysis revealed details of structures that could not be detected by X-ray radiography or visual...
Series: Geological Society, London, Special Publications
Published: 01 January 2007
DOI: 10.1144/GSL.SP.2007.271.01.26
EISBN: 9781862395190
... and is especially beneficial at radiation sources with a low flux. Cone beam geometry is therefore typically used at X-ray microfocus tubes and can also be applied at X-ray synchrotron facilities. Non-destructive techniques, such as X-ray tomography, and neutron tomography, have been reviewed. Both techniques...
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Image
3-D <b>X</b>-<b>ray</b> <b>tomography</b> image of gold- and sulfide-bearing vein showing locati...
Published: 01 April 2019
FIGURE 8. 3-D X-ray tomography image of gold- and sulfide-bearing vein showing locations of minerals in 3-D within the rock. Used with permission from Gold Road Resources ( www.goldroad.com.au ) and Oreexplore ( https://orexplore.com ).
Image
Model discretization of 2D <b>X</b>-<b>ray</b> <b>tomography</b>. The      a   i  ,  j       coe...
in > Geophysics
Published: 13 March 2019
Figure 5. Model discretization of 2D X-ray tomography. The a i , j coefficients in the blue square show the corresponding factors of the projection matrix A for the four top-left elements of the discrete model for X-ray i (see equations  4 and 7 ).
Image
<b>X</b>-<b>ray</b> <b>tomography</b> data from the Cliff chromitites. ( a ) An example of the ~...
Published: 01 June 2018
Fig. 10. X-ray tomography data from the Cliff chromitites. ( a ) An example of the ~1 mm diameter cores analysed by synchrotron. The dense phase coloured in light brown is Cr-spinel. ( b ) Hand specimen scanned at the MXIF facility, University of Manchester, using the Nikon Metris 225/320 kV Xray
Image
<b>X</b>-<b>ray</b> <b>tomography</b> data from the Cliff chromitites. ( a ) False-coloured μCT ...
Published: 01 June 2018
Fig. 11. X-ray tomography data from the Cliff chromitites. ( a ) False-coloured μCT scan showing Cr-spinel (light-brown) and clusters of Ni-arsenide grains (false-colour purple) sited at the point where a fracture network intersects the boundary between a Cr-spinel grain and the serpentinized