Electron backscatter diffraction analysis of zircon: A systematic assessment of match unitcharacteristics and pattern indexing optimization
Quantitative microstructural analysis of zircon using electron backscatter diffraction (EBSD) requires a comparison of empirically collected electron backscatter patterns with theoretical patterns or “match units” derived from known crystallographic parameters. There are 23 possible crystallographic...
| Main Authors: | , , |
|---|---|
| Format: | Journal Article |
| Published: |
Mineralogical Society of America
2008
|
| Subjects: | |
| Online Access: | http://www.minsocam.org http://hdl.handle.net/20.500.11937/29125 |
| _version_ | 1848752720700243968 |
|---|---|
| author | Reddy, Steven Timms, Nicholas Eric Eglington, B. |
| author_facet | Reddy, Steven Timms, Nicholas Eric Eglington, B. |
| author_sort | Reddy, Steven |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Quantitative microstructural analysis of zircon using electron backscatter diffraction (EBSD) requires a comparison of empirically collected electron backscatter patterns with theoretical patterns or “match units” derived from known crystallographic parameters. There are 23 possible crystallographic data sets for zircon, and associated match units, derived from natural and synthetic zircon and from theoretical calculations over a range of pressures and different rare earth element (REE) compositions. A systematic assessment of these match units has been undertaken by EBSD analysis of each of four zircons from a range of geological environments combined with principal components analysis and self-organizing map networks. Comparison of the different match units shows a systematic relationship across all samples that are related to changes in unit-cell dimensions associated with pressure and compositional variations. Systematic variations in the data generated from 96 EBSD maps, each comprising 10 000 electron backscatter patterns, indicate that match units associated with increasing pressure or REE dopants yield poorer quality EBSD data. The match units from low-pressure, undoped, natural zircon consistently yield the best EBSD results and are recommended for natural zircon EBSD studies irrespective of the zircon source or U content. The results provide a clear strategy for optimizing the acquisition and analysis of EBSD data from zircon from both crustal and mantle sources. In addition, the developed approach to match unit analysis may be applied to all other crystalline materials, potentially optimizing EBSD analyses from a range of materials. |
| first_indexed | 2025-11-14T08:13:07Z |
| format | Journal Article |
| id | curtin-20.500.11937-29125 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:13:07Z |
| publishDate | 2008 |
| publisher | Mineralogical Society of America |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-291252017-10-02T02:28:15Z Electron backscatter diffraction analysis of zircon: A systematic assessment of match unitcharacteristics and pattern indexing optimization Reddy, Steven Timms, Nicholas Eric Eglington, B. reflector file pressure microstructure EBSD zircon match unit REE Quantitative microstructural analysis of zircon using electron backscatter diffraction (EBSD) requires a comparison of empirically collected electron backscatter patterns with theoretical patterns or “match units” derived from known crystallographic parameters. There are 23 possible crystallographic data sets for zircon, and associated match units, derived from natural and synthetic zircon and from theoretical calculations over a range of pressures and different rare earth element (REE) compositions. A systematic assessment of these match units has been undertaken by EBSD analysis of each of four zircons from a range of geological environments combined with principal components analysis and self-organizing map networks. Comparison of the different match units shows a systematic relationship across all samples that are related to changes in unit-cell dimensions associated with pressure and compositional variations. Systematic variations in the data generated from 96 EBSD maps, each comprising 10 000 electron backscatter patterns, indicate that match units associated with increasing pressure or REE dopants yield poorer quality EBSD data. The match units from low-pressure, undoped, natural zircon consistently yield the best EBSD results and are recommended for natural zircon EBSD studies irrespective of the zircon source or U content. The results provide a clear strategy for optimizing the acquisition and analysis of EBSD data from zircon from both crustal and mantle sources. In addition, the developed approach to match unit analysis may be applied to all other crystalline materials, potentially optimizing EBSD analyses from a range of materials. 2008 Journal Article http://hdl.handle.net/20.500.11937/29125 10.2138/am.2008.2658 http://www.minsocam.org Mineralogical Society of America restricted |
| spellingShingle | reflector file pressure microstructure EBSD zircon match unit REE Reddy, Steven Timms, Nicholas Eric Eglington, B. Electron backscatter diffraction analysis of zircon: A systematic assessment of match unitcharacteristics and pattern indexing optimization |
| title | Electron backscatter diffraction analysis of zircon: A systematic assessment of match unitcharacteristics and pattern indexing optimization |
| title_full | Electron backscatter diffraction analysis of zircon: A systematic assessment of match unitcharacteristics and pattern indexing optimization |
| title_fullStr | Electron backscatter diffraction analysis of zircon: A systematic assessment of match unitcharacteristics and pattern indexing optimization |
| title_full_unstemmed | Electron backscatter diffraction analysis of zircon: A systematic assessment of match unitcharacteristics and pattern indexing optimization |
| title_short | Electron backscatter diffraction analysis of zircon: A systematic assessment of match unitcharacteristics and pattern indexing optimization |
| title_sort | electron backscatter diffraction analysis of zircon: a systematic assessment of match unitcharacteristics and pattern indexing optimization |
| topic | reflector file pressure microstructure EBSD zircon match unit REE |
| url | http://www.minsocam.org http://hdl.handle.net/20.500.11937/29125 |