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Zircon U-Pb dating of Early Palaeozoic monzonitic intrusives from the Goonumbla area, New South Wales

Butera, K M; Williams, Ian; Blevin, P; Simpson, C J


Zircon U-Pb ages measured on four small intrusions into the succession of Ordovician volcanic rocks that hosts Northparkes Cu-Au mine northwest of Parkes, New South Wales, place limits on the age of the volcanic sequence. The basal Nelungaloo Volcanics are constrained by a cross-cutting monzodiorite to be ≥484.3 ± 2.9 Ma (Early Ordovician). Similarly, the overlying basal Goonumbla Volcanics are constrained by another cross-cutting monzodiorite to be ≥450.8 ± 4.2 Ma (Middle Ordovician). A later...[Show more]

CollectionsANU Research Publications
Date published: 2001
Type: Journal article
Source: Australian Journal of Earth Sciences
DOI: 10.1046/j.1440-0952.2001.00870.x


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