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Correction of multi-collector-ICP-MS instrumental biases in high-precision uranium-thorium chronology

Abstract:

We present a method for the calibration of in-house thorium isotope standards for use in U-Th chronology, along with an assessment of instrumental biases on the Nu Plasma multi-collector inductively-coupled-plasma mass spectrometer. Uranium and thorium mass fractionation is found to be very strongly coupled, with no evidence of differences in mass bias behaviour. Both Th-isotope and U-Th fractionation are most closely approximated by a linear-law fractionation model. Any deviations from linea...

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Publication status:
Published

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Publisher copy:
10.1016/j.ijms.2010.06.016

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Institution:
University of Oxford
Department:
Oxford, MPLS, Earth Sciences
Journal:
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
Volume:
295
Issue:
1-2
Pages:
26-35
Publication date:
2010-07-15
DOI:
ISSN:
1387-3806
URN:
uuid:cbe13c05-a5d5-4aaa-96c1-c1b805373292
Source identifiers:
83049
Local pid:
pubs:83049

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