Ruthenium variation in chromite from komatiites and komatiitic basalts-a potential mineralogical indicator for nickel sulfide mineralization

Marek Locmelis, Marco Fiorentini, S.J. Barnes, N.J. Pearson

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    22 Citations (Scopus)

    Abstract

    More than 390 chromite grains from komatiites and komatiitic basalts from the Yilgarn craton of WesternAustralia and the Finnish part of the Fennoscandian Shield were analyzed using in situ laser ablation inductivelycoupled plasma mass spectrometry (LA-ICP-MS) to identify ruthenium (Ru) signatures in chromiteassociated with nickel sulfide-bearing rocks. Results indicate a potential method to discriminate mineralizedand barren komatiite and komatiitic basalt units based on Ru concentrations in chromite and indicate potentialfor chromite to be used as a resistate indicator mineral in exploration for komatiite-associated nickel sulfidedeposits.Chromites from barren komatiites and komatiitic basalts display Ru concentrations mostly between ∼150and 600 ppb. Chromites from mineralized units have distinctly lower Ru contents (
    Original languageEnglish
    Pages (from-to)355-364
    JournalEconomic Geology and the Bulletin of the Society of Economic Geologists
    Volume108
    Issue number2
    DOIs
    Publication statusPublished - 2013

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