Rapid U‐Pb Geochronology by Laser Ablation Multi‐Collector ICP‐MS
Rapid U‐Pb Geochronology by Laser Ablation Multi‐Collector ICP‐MS
复制标题
通过激光烧蚀多接收器 ICP-MS 进行快速 U-Pb 地质年代学
DOI:
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发表时间:
2020
影响因子:
3.8
通讯作者:
M. Pecha
中科院分区:
文献类型:
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作者:
K. Sundell;G. Gehrels;M. Pecha
Detrital zircon (DZ) U‐Pb laser ablation‐inductively coupled plasma‐mass spectrometry (LA‐ICP‐MS) has revolutionised the way geologists approach many Earth science questions. Although recent research has focused on rapid sample throughput, acquisition rates are limited to 100–300 analyses h−1. We present a method to acquire zircon U‐Pb dates at rates of 120, 300, 600 and 1200 analyses h−1 (30, 12, 6 and 3 s per analysis) by multi‐collector LA‐ICP‐MS. We demonstrate the efficacy of this method by analysing twelve zircon reference materials with dates from ~ 3465 to ~ 28 Ma. Mean offset from high‐precision dates increases with faster rates from 0.9% to 1.1%; mean random 1s uncertainty increases from 0.6% to 1.3%. We tested this new method on a sandstone sample previously characterised by large‐n DZ geochronology. Quantitative comparison shows increased correspondence among age distributions comprising > 300 dates. This new method holds promise for DZ geochronology because (a) it requires no major changes to hardware, but rather modifications to software; (b) it yields robust age distributions well‐suited for quantitative analysis and maximum depositional age calculations; (c) there is only a minor sacrifice of accuracy and measurement uncertainty; and (d) there is less burden to researchers in terms of time investment and analytical cost.
影响因子:
5.3
作者:
J. Saylor;K. Sundell;G. Sharman
通讯作者:
J. Saylor;K. Sundell;G. Sharman
影响因子:
5.8
作者:
Cawood, P. A.;Hawkesworth, C. J.;Dhuime, B.
通讯作者:
Dhuime, B.