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Issue 5, 2015
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Quadrupole LA-ICP-MS U/Pb geochronology of baddeleyite single crystals

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Abstract

We present a straightforward method for accurate and precise U/Pb dating of baddeleyite using quadrupole LA-ICP-MS. To establish the validity of our ICP-MS data we used FC-4b baddeleyite from the Duluth complex as external standard, whereas baddeleyite from the Phalaborwa (South Africa) and the Sorkka (SW Finland) intrusions were treated as unknowns. The analytical protocol includes the use of a matrix matched standard, which allows for an accurate downhole-fractionation and laser-induced interelement fractionation correction. The quadrupole ICP-MS results for the Phalaborwa and Sorkka samples analyzed are accurate within error of the published ID-TIMS U/Pb ages and with a precision of 0.3–0.7% (2σ) from concordia ages of ten to twenty analyses per sample. No orientation effects were observed.

Graphical abstract: Quadrupole LA-ICP-MS U/Pb geochronology of baddeleyite single crystals

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Article information


Submitted
03 Nov 2014
Accepted
04 Dec 2014
First published
16 Dec 2014

J. Anal. At. Spectrom., 2015,30, 1191-1196
Article type
Technical Note

Quadrupole LA-ICP-MS U/Pb geochronology of baddeleyite single crystals

C. C. Wohlgemuth-Ueberwasser, U. Söderlund, V. Pease and M. K. M. Nilsson, J. Anal. At. Spectrom., 2015, 30, 1191
DOI: 10.1039/C4JA00400K

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