An in situ technique for (U-Th-Sm)/He and U-Pb double dating
We report on a new laser-based technique for rapid, quantitative and automated in situ double dating (U-Pb and (U-Th-Sm)/He) of minerals, for applications in geochronology, thermochronology and geochemistry. In situ laser microanalysis offers several advantages over conventional bulk crystal methods...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Published: |
Royal Society of Chemistry
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/34373 |
| _version_ | 1848754204834791424 |
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| author | Evans, Noreen McInnes, Brent McDonald, B. Danišík, Martin Becker, Thomas Vermeesch, P. Shelley, M. Marillo-Sialer, E. Patterson, D. |
| author_facet | Evans, Noreen McInnes, Brent McDonald, B. Danišík, Martin Becker, Thomas Vermeesch, P. Shelley, M. Marillo-Sialer, E. Patterson, D. |
| author_sort | Evans, Noreen |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We report on a new laser-based technique for rapid, quantitative and automated in situ double dating (U-Pb and (U-Th-Sm)/He) of minerals, for applications in geochronology, thermochronology and geochemistry. In situ laser microanalysis offers several advantages over conventional bulk crystal methods in terms of spatial resolution, productivity, and safety. This new approach/methodology utilizes an interoperable and integrated suite of analytical instruments including a 193 nm ArF excimer laser system, quadrupole ICP-MS, quadrupole helium mass spectrometry system and swappable flow-through and ultra-high vacuum analytical chambers. We describe the analytical protocols for zircon analysis including grain mounting in Teflon, parameters for parent and daughter isotopic measurement, and standard development, and provide a freeware application for determining (U-Th-Sm)/He 'pairwise' ages from analytical data. The in situ double dating method described is applied to the Ellendale lamproite pipe and country rocks, Western Australia and successfully replicates conventional U-Pb and (U-Th-Sm)/He age variations determined previously by conventional techniques. |
| first_indexed | 2025-11-14T08:36:42Z |
| format | Journal Article |
| id | curtin-20.500.11937-34373 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:36:42Z |
| publishDate | 2015 |
| publisher | Royal Society of Chemistry |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-343732017-10-24T00:30:09Z An in situ technique for (U-Th-Sm)/He and U-Pb double dating Evans, Noreen McInnes, Brent McDonald, B. Danišík, Martin Becker, Thomas Vermeesch, P. Shelley, M. Marillo-Sialer, E. Patterson, D. We report on a new laser-based technique for rapid, quantitative and automated in situ double dating (U-Pb and (U-Th-Sm)/He) of minerals, for applications in geochronology, thermochronology and geochemistry. In situ laser microanalysis offers several advantages over conventional bulk crystal methods in terms of spatial resolution, productivity, and safety. This new approach/methodology utilizes an interoperable and integrated suite of analytical instruments including a 193 nm ArF excimer laser system, quadrupole ICP-MS, quadrupole helium mass spectrometry system and swappable flow-through and ultra-high vacuum analytical chambers. We describe the analytical protocols for zircon analysis including grain mounting in Teflon, parameters for parent and daughter isotopic measurement, and standard development, and provide a freeware application for determining (U-Th-Sm)/He 'pairwise' ages from analytical data. The in situ double dating method described is applied to the Ellendale lamproite pipe and country rocks, Western Australia and successfully replicates conventional U-Pb and (U-Th-Sm)/He age variations determined previously by conventional techniques. 2015 Journal Article http://hdl.handle.net/20.500.11937/34373 10.1039/c5ja00085h http://creativecommons.org/licenses/by-nc/3.0 Royal Society of Chemistry fulltext |
| spellingShingle | Evans, Noreen McInnes, Brent McDonald, B. Danišík, Martin Becker, Thomas Vermeesch, P. Shelley, M. Marillo-Sialer, E. Patterson, D. An in situ technique for (U-Th-Sm)/He and U-Pb double dating |
| title | An in situ technique for (U-Th-Sm)/He and U-Pb double dating |
| title_full | An in situ technique for (U-Th-Sm)/He and U-Pb double dating |
| title_fullStr | An in situ technique for (U-Th-Sm)/He and U-Pb double dating |
| title_full_unstemmed | An in situ technique for (U-Th-Sm)/He and U-Pb double dating |
| title_short | An in situ technique for (U-Th-Sm)/He and U-Pb double dating |
| title_sort | in situ technique for (u-th-sm)/he and u-pb double dating |
| url | http://hdl.handle.net/20.500.11937/34373 |