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CHIME monazite dating; Pb analysis on an R$$_{rm R}$$ =100 mm spectrometer and correction of interferences between Th, U, and Pb with natural monazite

Shimizu, Mayuko   ; Shibata, Kenji*; Suzuki, Kazuhiro; Sueoka, Shigeru   ; Niwa, Masakazu   

This paper outlines an advanced procedure involving the chemical Th-U-total Pb isochron method (CHIME) dating of monazite using a field-emission electron probe microanalyzer (FE-EPMA) equipped with spectrometers of 100 mm Rowland circle (R$$_{rm R}$$) radius. The higher count rate of R$$_{rm R}$$ = 100 mm wavelength dispersive spectrometer (WDS) compared to R$$_{rm R}$$ = 140 mm WDS enables measurements to be taken in a shorter time. CHIME dating using R$$_{rm R}$$ = 100 mm WDS had previously been difficult because of lower resolution compared to that of R$$_{rm R}$$ = 140 mm WDS. This problem has been overcome by a new interference correction method using natural monazites.

Language

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English

Journal

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Journal of Mineralogical and Petrological Sciences

Volume

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112

Number

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2

Pages

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p.88 - 96

Publication Year/Month

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2017/04

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Held date

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Location (country)

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Patent information

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PDF

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Paper URL

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https://doi.org/10.2465/jmps.160719d

DOI for research data

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Keywords

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no keyword

Research Facility

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Press Release

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Article of JAEA R&D Review

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Dating of Minerals in Rocks; Technical Development of a Rapid CHIME Dating Procedure[/]

Cooperating Institute

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Accesses

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- Accesses

InCites™

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Percentile:10.11

Category:Mineralogy

Altmetrics

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