213 nm Nd-YAGレーザーアブレーションICP質量分析装置を用いたジルコンのU-Pb局所年代分析 : SHRIMPデータとの整合性の検討
地質学雑誌 Volume 118 Issue 11
Page 762-767
published_at 2012-11-15
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| File | |
| Title ( jpn ) |
213 nm Nd-YAGレーザーアブレーションICP質量分析装置を用いたジルコンのU-Pb局所年代分析 : SHRIMPデータとの整合性の検討
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| Title ( eng ) |
U-Pb zircon dating using Nd-YAG (213 nm) Laser ablation-ICP-MS, and evaluating the consistency with SHRIMP dating
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| Creator |
Katsube Aya
Sakaguchi Aya
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| Source Title |
地質学雑誌
The Journal of the Geological Society of Japan
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| Volume | 118 |
| Issue | 11 |
| Start Page | 762 |
| End Page | 767 |
| Abstract |
Laser ablation–inductively coupled plasma-mass spectrometry (LA-ICP-MS) is a powerful tool for rapid and precise U-Pb zircon age dating. Here, we report U-Pb ages for detrital zircons determined using 213 nm Nd-YAG LA-ICP-MS analysis, and compare these results with those determined using a sensitive high-resolution ion microprobe (SHRIMP) to evaluate approaches for detrital zircon age dating during provenance analysis. Consistency of the system was assessed by measuring four well-characterized standard zircon samples (Plešovice, SL13, AS3, QGNG), with weighted mean measured 206Pb/238U and 207Pb/206Pb ages of the samples only slightly offset from the reference ages and with acceptable MSWD values, barring the 207Pb/206Pb age of the Plešovice zircon, which had a low 207Pb signal intensity. Detrital zircon grains were re-measured by LA-ICP-MS to assess consistency between the LA and SHRIMP systems, with 207Pb/206Pb ages for zircons older than 1000 Ma in excellent agreement with SHRIMP ages; typical offsets were between −3.9% and 0.3%. In addition, zircons younger than 1000 Ma had more accurate 206Pb/238U than 207Pb/206Pb ages. Both LA-ICP-MS and SHRIMP techniques produce results that are in excellent agreement, barring a few analyses that were affected by zircon heterogeneity or zoning.
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| Keywords |
LA-ICP-MS
detrital zircon age dating
Nd-YAG
SHRIMP
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| Descriptions |
本研究の経費に，日本学術振興会特別研究員奨励費(課題番号 : 23-7273)および同科学研究費補助金基礎研究(c) (No. 20540445)の一部を使用した．
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| Language |
jpn
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| Resource Type | journal article |
| Publisher |
日本地質学会
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| Date of Issued | 2012-11-15 |
| Rights |
© The Geological Society of Japan 2012
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0016-7630
[ISSN] 1349-9963
[NCID] AN00141768
[DOI] 10.5575/geosoc.2012.0051
[DOI] https://doi.org/10.5575/geosoc.2012.0051
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