期刊
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
卷 9, 期 -, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2007GC001805
关键词
geochronology; LA-ICPMS
资金
- Division Of Earth Sciences
- Directorate For Geosciences [0732436] Funding Source: National Science Foundation
U-Th-Pb geochronology by laser ablation-multicollector-inductively coupled plasma-mass spectrometry initiated during the mid to late 1990s as a reconnaissance tool, capable of generating ages of only moderate precision from relatively large volumes of zircon. New developments in instrumentation and experimental methodology, as described herein and by other researchers, now make it possible it to correct for common Pb accurately (using measured 204 Pb), to acquire geochronologic information rapidly (30-40 unknowns/h), to generate U-Pb ages with an accuracy of better than 1% for most zircon standards, and to conduct analyses on much smaller (e. g., 10 mm by 6 mm) volumes of material. These capabilities are driving important advances in many aspects of Earth science research.
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