Impact and Correction of Analytical Positioning on Accuracy of Zircon U-Pb Dating by SIMS
Secondary ion mass spectrometry (SIMS) is one of the most important analytical tools for geochronology, especially for zircon U-Pb dating. Due to its advantages in spatial resolution and analytical precision, SIMS is the preferred option for multi-spot analyses on single zircon grain with complex st...
| Main Authors: | , , , , , |
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| Format: | Article |
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Frontiers Media S.A.
2020-12-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fchem.2020.605646/full |
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| author | Yu Liu Yu Liu Qiu-Li Li Qiu-Li Li Qiu-Li Li Xiao-Xiao Ling Xiao-Xiao Ling Guo-Qiang Tang Guo-Qiang Tang Jiao Li Jiao Li Xian-Hua Li Xian-Hua Li Xian-Hua Li |
| author_facet | Yu Liu Yu Liu Qiu-Li Li Qiu-Li Li Qiu-Li Li Xiao-Xiao Ling Xiao-Xiao Ling Guo-Qiang Tang Guo-Qiang Tang Jiao Li Jiao Li Xian-Hua Li Xian-Hua Li Xian-Hua Li |
| author_sort | Yu Liu |
| collection | DOAJ |
| description | Secondary ion mass spectrometry (SIMS) is one of the most important analytical tools for geochronology, especially for zircon U-Pb dating. Due to its advantages in spatial resolution and analytical precision, SIMS is the preferred option for multi-spot analyses on single zircon grain with complex structures. However, whether or how much the relative positions of multiple analytical spots on one zircon grain affect the U-Pb age accuracy is an important issue that has been neglected by most researchers. In this study, we carried out a series of investigation on the influence of relative analytical position during zircon U-Pb age analyses, using Cameca IMS 1280-HR instrument. The results demonstrated a significant influence on the second spot, with apparent U-Pb age deviation as high as around 10% especially on the left and right side with overlap in the raster area. Nevertheless, a linear correlation between a secondary ion centering parameter (DTCA-X) and age deviation in percentage terms was found, and a calibration method was established to correct this position effect. Four zircon standards (91500, M257, TEMORA-2, and Plešovice) were measured to prove the reliability of the established procedure. The original U-Pb apparent data show inconsistent deviation on four directions relative to the datum, while the final U-Pb age results is calibrated to be consistent with their recommended values, within uncertainties of ~1%. This work calls for re-examination for the previous SIMS U-Pb dating results on core-rim dating strategy, and provides a calibration protocol to correct the relative position effect. |
| first_indexed | 2024-12-21T13:25:37Z |
| format | Article |
| id | doaj.art-509d2f1b8a7442ffaea462bab78a9869 |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-12-21T13:25:37Z |
| publishDate | 2020-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Chemistry |
| spelling | doaj.art-509d2f1b8a7442ffaea462bab78a98692022-12-21T19:02:28ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462020-12-01810.3389/fchem.2020.605646605646Impact and Correction of Analytical Positioning on Accuracy of Zircon U-Pb Dating by SIMSYu Liu0Yu Liu1Qiu-Li Li2Qiu-Li Li3Qiu-Li Li4Xiao-Xiao Ling5Xiao-Xiao Ling6Guo-Qiang Tang7Guo-Qiang Tang8Jiao Li9Jiao Li10Xian-Hua Li11Xian-Hua Li12Xian-Hua Li13State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaInnovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, ChinaState Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaInnovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, ChinaCollege of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, ChinaState Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaInnovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, ChinaState Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaInnovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, ChinaState Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaInnovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, ChinaState Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaInnovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, ChinaCollege of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, ChinaSecondary ion mass spectrometry (SIMS) is one of the most important analytical tools for geochronology, especially for zircon U-Pb dating. Due to its advantages in spatial resolution and analytical precision, SIMS is the preferred option for multi-spot analyses on single zircon grain with complex structures. However, whether or how much the relative positions of multiple analytical spots on one zircon grain affect the U-Pb age accuracy is an important issue that has been neglected by most researchers. In this study, we carried out a series of investigation on the influence of relative analytical position during zircon U-Pb age analyses, using Cameca IMS 1280-HR instrument. The results demonstrated a significant influence on the second spot, with apparent U-Pb age deviation as high as around 10% especially on the left and right side with overlap in the raster area. Nevertheless, a linear correlation between a secondary ion centering parameter (DTCA-X) and age deviation in percentage terms was found, and a calibration method was established to correct this position effect. Four zircon standards (91500, M257, TEMORA-2, and Plešovice) were measured to prove the reliability of the established procedure. The original U-Pb apparent data show inconsistent deviation on four directions relative to the datum, while the final U-Pb age results is calibrated to be consistent with their recommended values, within uncertainties of ~1%. This work calls for re-examination for the previous SIMS U-Pb dating results on core-rim dating strategy, and provides a calibration protocol to correct the relative position effect.https://www.frontiersin.org/articles/10.3389/fchem.2020.605646/fullSIMSzirconU-Pb datingpositioning effectmetamorphic overgrowth |
| spellingShingle | Yu Liu Yu Liu Qiu-Li Li Qiu-Li Li Qiu-Li Li Xiao-Xiao Ling Xiao-Xiao Ling Guo-Qiang Tang Guo-Qiang Tang Jiao Li Jiao Li Xian-Hua Li Xian-Hua Li Xian-Hua Li Impact and Correction of Analytical Positioning on Accuracy of Zircon U-Pb Dating by SIMS Frontiers in Chemistry SIMS zircon U-Pb dating positioning effect metamorphic overgrowth |
| title | Impact and Correction of Analytical Positioning on Accuracy of Zircon U-Pb Dating by SIMS |
| title_full | Impact and Correction of Analytical Positioning on Accuracy of Zircon U-Pb Dating by SIMS |
| title_fullStr | Impact and Correction of Analytical Positioning on Accuracy of Zircon U-Pb Dating by SIMS |
| title_full_unstemmed | Impact and Correction of Analytical Positioning on Accuracy of Zircon U-Pb Dating by SIMS |
| title_short | Impact and Correction of Analytical Positioning on Accuracy of Zircon U-Pb Dating by SIMS |
| title_sort | impact and correction of analytical positioning on accuracy of zircon u pb dating by sims |
| topic | SIMS zircon U-Pb dating positioning effect metamorphic overgrowth |
| url | https://www.frontiersin.org/articles/10.3389/fchem.2020.605646/full |
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