Single zircon evaporation ages from the Oban Massif, southeastern Nigeria
BN Ekwueme, A Kröner - Journal of African Earth Sciences, 1998 - Elsevier
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 …
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 …
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