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Single zircon evaporation ages from the Oban Massif, southeastern Nigeria

Abstract:

A single zircon geochronological study in the Oban Massif of southeastern Nigeria, using the evaporation technique, provides evidence for the existence of Palaeoproterozoic crustal components in the area. The banded gneiss in the Oban village yielded a 207Pb/206Pb age of 1931.9 ± 0.8 Ma, whilst charnockites associated with this gneiss provided an emplacement age of 584.5 ± 1.0 Ma. The volumetrically most important intrusive unit in the Oban area is a granodiorite that yielded a zircon age of 616.9 ± 1 Ma. These ages suggest that the banded gneiss is the oldest rock in the Oban Massif and that the emplacement of granodiorite and the formation of charnockites took place during the Pan-African Orogeny. © 1998 Elsevier Science Limited.

Año de publicación:

1998

Keywords:

    Fuente:

    scopusscopus

    Tipo de documento:

    Article

    Estado:

    Acceso restringido

    Áreas de conocimiento:

    • Geocronología

    Áreas temáticas:

    • Mineralogía
    • Geología, hidrología, meteorología
    • Geología económica

    Contribuidores:

    Alfred Kron̈erAlfred Kron̈er
    Ekwueme B.N.Ekwueme B.N.