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Complex history of a zircon aggregate from lunar breccia 73235

Pidgeon, Robert T; Nemchin, Alexander; van Bronswijk, W.; Geisler, T.; Meyer, C.; Compston, William; Williams, Ian

Description

Results are reported of an investigation of the age and origin of the exceptional zircon aggregate in an anorthositic clast from lunar breccia 73235. Cathodoluminescence and birefringence images show that the aggregate consists of numerous angular fragments of sector zoned primary zircon in a matrix of secondary zircon with an overall texture that resembles a pseudotachylite. SIMS U-Pb analyses of the primary fragments and the matrix yielded two clearly defined ages, an age of 4.315 ± 0.015 Ga...[Show more]

CollectionsANU Research Publications
Date published: 2007
Type: Journal article
URI: http://hdl.handle.net/1885/29402
Source: Geochimica et Cosmochimica Acta
DOI: 10.1016/j.gca.2006.11.021

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