A Yilgarn seed to the Pilbara Craton (Australia)? Evidence from inherited zircons

Andreas Petersson, Anthony Kemp, Martin J. Whitehouse

Research output: Contribution to journalArticle

Abstract

Knowledge of the age and compositional architecture of Archean cratonic lithosphere is critical for models of geodynamics and continental growth on early Earth, but can be difficult to unravel from the exposed geology. We report the occurrence of numerous >3.7 Ga zircon crystals in 3.45 Ga rhyolites of the eastern Pilbara Craton (Western Australia), which preserve evidence for an Eoarchean meta-igneous component in the deep Pilbara crust. This inherited zircon population shares similar and distinctive age and Hf-O isotope characteristics with the oldest gneissic components of the Yilgarn Craton ∼500 km farther south, suggesting a common ca. 3.75 Ga felsic crustal nucleus to these two Archean granite-greenstone terranes. We infer a pivotal role for such ‘seeds’ in facilitating the growth and persistence of Archean continental lithosphere.
Original languageEnglish
Article number11
Pages (from-to)1098–1102
Number of pages5
JournalGeology
Volume47
Issue number11
DOIs
Publication statusPublished - 25 Sep 2019

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Petersson, Andreas ; Kemp, Anthony ; Whitehouse, Martin J. / A Yilgarn seed to the Pilbara Craton (Australia)? Evidence from inherited zircons. In: Geology. 2019 ; Vol. 47, No. 11. pp. 1098–1102.
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A Yilgarn seed to the Pilbara Craton (Australia)? Evidence from inherited zircons. / Petersson, Andreas; Kemp, Anthony; Whitehouse, Martin J.

In: Geology, Vol. 47, No. 11, 11, 25.09.2019, p. 1098–1102.

Research output: Contribution to journalArticle

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