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Age of origin of the polymetamorphosed Copperton Formation, Namaqua- Natal Province, determined by single grain zircon Pb-Pb dating

Abstract:

The Copperton Formation of the Areachap Group in the Northern Cape Province is a strongly metamorphosed, predominantly metavolcanic unit which contains several massive sulphide deposits. Previous work on this unit has established a complex metamorphic history. The age of origin is still poorly constrained. Zircons extracted from the Smouspan Gneiss Member of the Copperton Formation have an igneous and probably volcanic origin, with no discernible metamorphic component. Whole-grain thermal evaporation on four such zircon grains yielded a precise set of 207Pb/206Pb data which establishes a 1285±14 Ma age for the origin of the Smouspan Gneiss and Copperton Formation. -from Authors

Año de publicación:

1990

Keywords:

    Fuente:

    scopusscopus

    Tipo de documento:

    Article

    Estado:

    Acceso restringido

    Áreas de conocimiento:

    • Geocronología

    Áreas temáticas:

    • Mineralogía
    • Geología, hidrología, meteorología
    • Petrología

    Contribuidores:

    Alfred Kron̈erAlfred Kron̈er
    Cornell D.Cornell D.
    Humphreys H.Humphreys H.
    Griffin G.Griffin G.