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Isotope age constraint for the Blue Dyke and Jardine Peak subvertical intrusions of King George Island, West Antarctica

Pańczyk, Magdalena; Nawrocki, Jerzy; Williams, Ian S.


The Blue Dyke and Jardine Peak are subvertical hypabyssal intrusions cutting a stratiform volcanic sequence in the Admiralty Bay area on King George Island (South Shetlands, Antarctica). The rocks are porphyritic, crystal−rich basaltic andesites. Tiny zir− con crystals were used for single grain SHRIMP U−Pb dating. The mean ages calculated for the zircon populations from both intrusions indicates Late Oligocene (Chattian) formations. Zircon grains from the Blue Dyke gave the mean age of...[Show more]

CollectionsANU Research Publications
Date published: 2009
Type: Journal article
Source: Polish Polar Research
DOI: 10.4202/ppres.2009.20


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