Advancing (U-Th)/He Zircon Dating: Novel Approaches in Sample Preparation and Uncertainty Reduction
The laser microprobe (U-Th)/He dating method is a new and efficient technique that utilizes an interoperable and integrated suite of instruments, including the excimer laser system, quadrupole helium mass spectrometer, and quadrupole inductively coupled plasma mass spectrometer. To demonstrate the a...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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GeoScienceWorld
2024-02-01
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| Series: | Lithosphere |
| Online Access: | https://pubs.geoscienceworld.org/gsa/lithosphere/article-pdf/doi/10.2113/2023/lithosphere_2023_258/6271204/lithosphere_2023_258.pdf |
| _version_ | 1827338661389139968 |
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| author | Yuqi Hao Ying Wang Zhuqi Zhang Jingxing Yu Yizhou Wang Jianzhang Pang Wanfeng Zhang Dewen Zheng |
| author_facet | Yuqi Hao Ying Wang Zhuqi Zhang Jingxing Yu Yizhou Wang Jianzhang Pang Wanfeng Zhang Dewen Zheng |
| author_sort | Yuqi Hao |
| collection | DOAJ |
| description | The laser microprobe (U-Th)/He dating method is a new and efficient technique that utilizes an interoperable and integrated suite of instruments, including the excimer laser system, quadrupole helium mass spectrometer, and quadrupole inductively coupled plasma mass spectrometer. To demonstrate the applicability of this new method, we applied both the conventional and laser microprobe techniques to the Sri Lanka zircon (LGC-1). We obtained twenty-two (U-Th)/He ages on nine shards using the laser microprobe method, showing an average (U-Th)/He age of 471.1 ± 16.6 Ma (1σ). This result is generally consistent with the mean conventional age (484.1 ± 9.6 Ma) for twenty-two zircon fragments. Both are nearly equal to the age value (~476 Ma) predicted by the He diffusion model and the thermal history model of Sri Lanka highland. The variations in the laser microprobe-derived ages are most likely caused by the uncertainties in volume measurements, which is also common in other studies. We used the Mahalanobis distance technique to reduce the volume measurement bias by identifying and eliminating abnormal data. |
| first_indexed | 2024-03-07T19:29:08Z |
| format | Article |
| id | doaj.art-9c5184b7a1244e88adcfe3140d685ad2 |
| institution | Directory Open Access Journal |
| issn | 1941-8264 1947-4253 |
| language | English |
| last_indexed | 2024-03-07T19:29:08Z |
| publishDate | 2024-02-01 |
| publisher | GeoScienceWorld |
| record_format | Article |
| series | Lithosphere |
| spelling | doaj.art-9c5184b7a1244e88adcfe3140d685ad22024-02-29T08:43:50ZengGeoScienceWorldLithosphere1941-82641947-42532024-02-012023Special 1410.2113/2023/lithosphere_2023_258Advancing (U-Th)/He Zircon Dating: Novel Approaches in Sample Preparation and Uncertainty ReductionYuqi Hao0https://orcid.org/0000-0002-6271-0951Ying Wang1Zhuqi Zhang2Jingxing Yu3Yizhou Wang4Jianzhang Pang5Wanfeng Zhang6Dewen Zheng7https://orcid.org/0009-0000-6164-9768State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, ChinaState Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, ChinaState Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, ChinaState Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, ChinaState Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, ChinaState Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, ChinaState Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, ChinaState Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, ChinaThe laser microprobe (U-Th)/He dating method is a new and efficient technique that utilizes an interoperable and integrated suite of instruments, including the excimer laser system, quadrupole helium mass spectrometer, and quadrupole inductively coupled plasma mass spectrometer. To demonstrate the applicability of this new method, we applied both the conventional and laser microprobe techniques to the Sri Lanka zircon (LGC-1). We obtained twenty-two (U-Th)/He ages on nine shards using the laser microprobe method, showing an average (U-Th)/He age of 471.1 ± 16.6 Ma (1σ). This result is generally consistent with the mean conventional age (484.1 ± 9.6 Ma) for twenty-two zircon fragments. Both are nearly equal to the age value (~476 Ma) predicted by the He diffusion model and the thermal history model of Sri Lanka highland. The variations in the laser microprobe-derived ages are most likely caused by the uncertainties in volume measurements, which is also common in other studies. We used the Mahalanobis distance technique to reduce the volume measurement bias by identifying and eliminating abnormal data.https://pubs.geoscienceworld.org/gsa/lithosphere/article-pdf/doi/10.2113/2023/lithosphere_2023_258/6271204/lithosphere_2023_258.pdf |
| spellingShingle | Yuqi Hao Ying Wang Zhuqi Zhang Jingxing Yu Yizhou Wang Jianzhang Pang Wanfeng Zhang Dewen Zheng Advancing (U-Th)/He Zircon Dating: Novel Approaches in Sample Preparation and Uncertainty Reduction Lithosphere |
| title | Advancing (U-Th)/He Zircon Dating: Novel Approaches in Sample Preparation and Uncertainty Reduction |
| title_full | Advancing (U-Th)/He Zircon Dating: Novel Approaches in Sample Preparation and Uncertainty Reduction |
| title_fullStr | Advancing (U-Th)/He Zircon Dating: Novel Approaches in Sample Preparation and Uncertainty Reduction |
| title_full_unstemmed | Advancing (U-Th)/He Zircon Dating: Novel Approaches in Sample Preparation and Uncertainty Reduction |
| title_short | Advancing (U-Th)/He Zircon Dating: Novel Approaches in Sample Preparation and Uncertainty Reduction |
| title_sort | advancing u th he zircon dating novel approaches in sample preparation and uncertainty reduction |
| url | https://pubs.geoscienceworld.org/gsa/lithosphere/article-pdf/doi/10.2113/2023/lithosphere_2023_258/6271204/lithosphere_2023_258.pdf |
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