S saturation history of Nain Plutonic Suite mafic intrusions: origin of the Voiseya's Bay Ni-Cu-Co sulfide deposit, Labrador, Canada

Peter Lightfoot, Reid Keays, Dawn Evans-Lamswood, Robert Wheeler

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    86 Citations (Scopus)

    Abstract

    The Voiseya s Bay deposit is hosted in a 1.34-Ga intrusion composed of troctolite, olivine gabbro, and ferrogabbro. The sulfide mineralization is associated with magmatic breccias that are enveloped by weakly mineralized olivine gabbros and troctolites, and also occurs as veins along structures in adjacent paragneiss. A dyke is connected to the base of the north wall of the Eastern Deeps Intrusion, and the entry point of this dyke into the chamber is the locus of the Eastern Deeps nickel sulfide deposit. A detailed exploration in the area between the Eastern Deeps and the Ovoid has shown that these intrusions and ore deposits are connected by a splayed dyke. The Eastern Deeps Deposit is surrounded by a halo of moderately to weakly mineralized variable-textured troctolite (VTT) that reaches a maximum thickness above the axis of the Eastern Deeps Deposit along the northern wall of the Eastern Deeps Intrusion.
    Original languageEnglish
    Pages (from-to)23 - 50
    Number of pages28
    JournalMineralium Deposita
    Volume47
    Issue number1-2
    DOIs
    Publication statusPublished - 2012

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