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Initial Hf isotope compositions in magmatic zircon from early Proterozoic rocks from the Gawler Craton, Australia: A test for zircon model ages

Nebel, Oliver; Nebel-Jacobsen, Yona; Mezger, Klaus; Berndt, J

Description

We evaluate the validity of age information obtained from two-stage Hf model ages in zircon. Multiple isotope investigations of minerals from the Kiana Granite of the Archean Sleafordian Complex from the southern Gawler Craton, Australia, reveal a complex geologic evolution of the suite. Rubidium-Sr mineral ages define a tectono-thermal event at 1673.4 ± 4.2 Ma, associated with the Kimban orogeny. ID-TIMS U-Pb ages from single zircons yield an upper concordia intercept at 2348 ± 21 Ma, which...[Show more]

CollectionsANU Research Publications
Date published: 2007
Type: Journal article
URI: http://hdl.handle.net/1885/39667
Source: Chemical Geology
DOI: 10.1016/j.chemgeo.2007.02.008

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