Solution and laser ablation MC-ICP-MS lead isotope analysis of gold

Christopher Standish*, Bruno Dhuime, Robert Chapman, Christopher Coath, Chris Hawkesworth, Alistair Pike

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    21 Citations (Scopus)

    Abstract

    A new approach is presented for the analysis of lead isotopes in gold using solution and laser ablation multi-collector inductively-coupled plasma mass-spectrometry (MC-ICP-MS). Repeat analyses of two gold reference materials (RAuGP3: 34.1 +/- 0.5 ppm Pb and RAuGP5: 129 +/- 4 ppm Pb, from SPEX CertiPrep Ltd) yield an external reproducibility of 20. Instrumental mass bias is corrected by standard sample bracketing, using NIST SRM981 for solution analyses and NIST SRM610 for laser ablation analyses. Both techniques agree within error, and they have been further demonstrated through the analyses of both geological and archaeological samples: multiple grains from two Irish alluvial gold deposits and samples of two Early Bronze Age Irish gold lunulae. The applicability of these techniques to studies concerning the sources and age of gold mineralisation, and the identification of gold sources exploited in antiquity, is highlighted.

    Original languageEnglish
    Pages (from-to)217-225
    Number of pages9
    JournalJournal of Analytical Atomic Spectrometry
    Volume28
    Issue number2
    DOIs
    Publication statusPublished - Feb 2013

    Keywords

    • EXTRACTION CHROMATOGRAPHIC RESIN
    • PB-ISOTOPE
    • MICROCHEMICAL CHARACTERIZATION
    • IRELAND
    • MINERALIZATION
    • EXCHANGE
    • EVOLUTION
    • GRAINS
    • SEPARATION
    • ARTIFACTS

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