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| Titel |
Inferring origin of mercury inclusions in quartz by multifractal analysis |
| VerfasserIn |
T. Shibata, T. Maruoka, T. Echigo |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 22, no. 1 ; Nr. 22, no. 1 (2015-01-23), S.47-52 |
| Datensatznummer |
250120962
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| Publikation (Nr.) |
 copernicus.org/npg-22-47-2015.pdf |
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| Zusammenfassung |
| In order to refine our understanding of how fluid inclusions were trapped in
the host minerals, we non-destructively observed mercury inclusions (liquid
Hg0) in quartz samples using X-ray computed tomography (CT) technique.
The X-ray CT apparatus can observe internal structures of the samples and
give cross-sectional images from the transmission of the X-rays through the
samples. From the cross-sectional images, we obtained three-dimensional
spatial distributions of mercury inclusions, and quantitatively analyzed
them using fractal and multifractal methods. Although the samples were from
different geological settings, the resultant fractal dimensions were 1.70
and 1.71 for the San Benito and Itomuka samples, respectively. The fractal
dimensions were also close to those predicted by diffusion-limited
aggregation models and percolation theory, which are controlled by the
irreversible kinetics. Given the fractal dimension and its implied
mechanism, we conclude that the mercury-bearing fluids were not primary
fluid inclusions, but migrated into the pre-existing cracks of quartz
crystals by diffusion processes. |
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