Relation between cathodoluminescence and trace-element distribution of magmatic topaz from the Ary-Bulak massif, Russia
In order to define the cathodoluminescence (CL) properties of magmatic topaz and its relation with traceelement composition, we studied topaz phenocrysts from the Ary-Bulak ongonite massif, Russia using a wide array of analytical techniques. Scanning electron microscopy CL panchromatic images reveal...
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| Format: | Journal Article |
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Mineralogical Society
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/9054 |
| _version_ | 1848745838752301056 |
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| author | Agangi, Andrea Gucsik, A. Nishido, H. Ninagawa, K. Kamenetsky, V. |
| author_facet | Agangi, Andrea Gucsik, A. Nishido, H. Ninagawa, K. Kamenetsky, V. |
| author_sort | Agangi, Andrea |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In order to define the cathodoluminescence (CL) properties of magmatic topaz and its relation with traceelement composition, we studied topaz phenocrysts from the Ary-Bulak ongonite massif, Russia using a wide array of analytical techniques. Scanning electron microscopy CL panchromatic images reveal strong variations, which define micrometre-scale euhedral growth textures. Several truncations of these growth textures occur in single grains implying multiple growth and resorption events. The CL spectra of both CLbright and -dark domains have a major peak in the near-ultraviolet centred at 393 nm. Cathodoluminescence images taken after several minutes of electron bombardment show decreasing emission intensity. Electron microprobe analyses indicate high F concentrations (average OH/(OH + F) = 0.04 calculated by difference, 100 wt.% – total from electron probe microanalyses), consistent with what has been found previously in topaz-bearing granites, and the OH stretching vibration (~3653 cm-1) was detected in Raman spectra. Laser ablation inductively-coupled plasma mass spectrometry traverses performed across the CL textures detected trace elements at ppm to thousands of ppm levels, including: Fe, Mn, Li, Be, B, P, Nb, Ta, W, Ti, Ga, light rare-earth elements, Th and U. Lithium,W, Nb and Ta appear to be correlated with CL intensity, suggesting a role for some of these elements in the activation of CL in topaz. In contrast, no clear correlation was found between CL intensity and F contents, despite the fact that the replacement of OH for F is known to affect the cell parameters of topaz. |
| first_indexed | 2025-11-14T06:23:43Z |
| format | Journal Article |
| id | curtin-20.500.11937-9054 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:23:43Z |
| publishDate | 2016 |
| publisher | Mineralogical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-90542017-09-13T16:11:35Z Relation between cathodoluminescence and trace-element distribution of magmatic topaz from the Ary-Bulak massif, Russia Agangi, Andrea Gucsik, A. Nishido, H. Ninagawa, K. Kamenetsky, V. In order to define the cathodoluminescence (CL) properties of magmatic topaz and its relation with traceelement composition, we studied topaz phenocrysts from the Ary-Bulak ongonite massif, Russia using a wide array of analytical techniques. Scanning electron microscopy CL panchromatic images reveal strong variations, which define micrometre-scale euhedral growth textures. Several truncations of these growth textures occur in single grains implying multiple growth and resorption events. The CL spectra of both CLbright and -dark domains have a major peak in the near-ultraviolet centred at 393 nm. Cathodoluminescence images taken after several minutes of electron bombardment show decreasing emission intensity. Electron microprobe analyses indicate high F concentrations (average OH/(OH + F) = 0.04 calculated by difference, 100 wt.% – total from electron probe microanalyses), consistent with what has been found previously in topaz-bearing granites, and the OH stretching vibration (~3653 cm-1) was detected in Raman spectra. Laser ablation inductively-coupled plasma mass spectrometry traverses performed across the CL textures detected trace elements at ppm to thousands of ppm levels, including: Fe, Mn, Li, Be, B, P, Nb, Ta, W, Ti, Ga, light rare-earth elements, Th and U. Lithium,W, Nb and Ta appear to be correlated with CL intensity, suggesting a role for some of these elements in the activation of CL in topaz. In contrast, no clear correlation was found between CL intensity and F contents, despite the fact that the replacement of OH for F is known to affect the cell parameters of topaz. 2016 Journal Article http://hdl.handle.net/20.500.11937/9054 10.1180/minmag.2016.080.023 Mineralogical Society fulltext |
| spellingShingle | Agangi, Andrea Gucsik, A. Nishido, H. Ninagawa, K. Kamenetsky, V. Relation between cathodoluminescence and trace-element distribution of magmatic topaz from the Ary-Bulak massif, Russia |
| title | Relation between cathodoluminescence and trace-element distribution of magmatic topaz from the Ary-Bulak massif, Russia |
| title_full | Relation between cathodoluminescence and trace-element distribution of magmatic topaz from the Ary-Bulak massif, Russia |
| title_fullStr | Relation between cathodoluminescence and trace-element distribution of magmatic topaz from the Ary-Bulak massif, Russia |
| title_full_unstemmed | Relation between cathodoluminescence and trace-element distribution of magmatic topaz from the Ary-Bulak massif, Russia |
| title_short | Relation between cathodoluminescence and trace-element distribution of magmatic topaz from the Ary-Bulak massif, Russia |
| title_sort | relation between cathodoluminescence and trace-element distribution of magmatic topaz from the ary-bulak massif, russia |
| url | http://hdl.handle.net/20.500.11937/9054 |