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Time-of-flight ICP-MS laser ablation zircon geochronology: Assessment and comparison against quadrupole ICP-MS
Citation
Thompson, JM and Danyushevsky, LV and Borovinskaya, O and Tanner, M, Time-of-flight ICP-MS laser ablation zircon geochronology: Assessment and comparison against quadrupole ICP-MS, Journal of Analytical Atomic Spectrometry, 35, (10) pp. 2282-2297. ISSN 0267-9477 (2020) [Refereed Article]
Copyright Statement
This journal is © The Royal Society of Chemistry 2020
Abstract
This study presents U–Pb isotopic results from the mineral zircon measured by nanosecond laser ablation coupled to either a time-of-flight inductively coupled plasma mass spectrometer (ICP-MS), a quadrupole ICP-MS or both via a split stream arrangement. Results show both ICP-MS types produce similar levels of precision and accuracy for most U–Pb ages in the mineral zircon. The time-of-flight ICP-MS however shows slight non-linearity at high detector counts (> 7000 for 238U) producing a bias in zircon U–Pb ages from published values outside analytical uncertainty. Use of 235U instead of 238U is shown to resolve the inaccuracy in the U–Pb age at the expense of analytical precision due to lower abundance of 235U. Trace element concentrations also measured along with U–Pb isotope data in zircon show the time-of-flight ICP-MS to provide similar accuracy and precision as the quadrupole ICP-MS, except for isotopes in regions around high intensity major element peaks (e.g. Zr) where accuracy and levels of detection of the time-of-flight ICP-MS are matrix dependent relative to the quadrupole ICP-MS. A comparison is made between the analytical capabilities of the time-of-flight ICP-MS and the quadrupole ICP-MS highlighting some advantages and disadvantages of the time-of-flight technology for zircon U–Pb geochronology.
Item Details
Item Type: | Refereed Article |
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Keywords: | zircon, LA-ICPMS, time of flight MS, split stream LA-ICPMS |
Research Division: | Earth Sciences |
Research Group: | Geology |
Research Field: | Geochronology |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the earth sciences |
UTAS Author: | Thompson, JM (Mr Jay Thompson) |
UTAS Author: | Danyushevsky, LV (Professor Leonid Danyushevsky) |
ID Code: | 144704 |
Year Published: | 2020 |
Funding Support: | Australian Research Council (IH130200004) |
Web of Science® Times Cited: | 5 |
Deposited By: | CODES ARC |
Deposited On: | 2021-06-06 |
Last Modified: | 2022-08-25 |
Downloads: | 0 |
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