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Crustal rejuvenation stabilised Earth’s first cratons

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Date
10/06/2021
Author
Mulder, Jacob A.
Nebel, Oliver
Gardiner, Nicholas J.
Cawood, Peter A.
Wainwright, Ashlea N.
Ivanic, Timothy J.
Keywords
QE Geology
DAS
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Abstract
The formation of stable, evolved (silica-rich) crust was essential in constructing Earth’s first cratons, the ancient nuclei of continents. Eoarchaean (4000–3600 million years ago, Ma) evolved crust occurs on most continents, yet evidence for older, Hadean evolved crust is mostly limited to rare Hadean zircons recycled into younger rocks. Resolving why the preserved volume of evolved crust increased in the Eoarchaean is key to understanding how the first cratons stabilised. Here we report new zircon uranium-lead and hafnium isotope data from the Yilgarn Craton, Australia, which provides an extensive record of Hadean–Eoarchaean evolved magmatism. These data reveal that the first stable, evolved rocks in the Yilgarn Craton formed during an influx of juvenile (recently extracted from the mantle) magmatic source material into the craton. The concurrent shift to juvenile sources and onset of crustal preservation links craton stabilisation to the accumulation of enduring rafts of buoyant, melt-depleted mantle.
Citation
Mulder , J A , Nebel , O , Gardiner , N J , Cawood , P A , Wainwright , A N & Ivanic , T J 2021 , ' Crustal rejuvenation stabilised Earth’s first cratons ' , Nature Communications , vol. 12 , 3535 . https://doi.org/10.1038/s41467-021-23805-6
Publication
Nature Communications
Status
Peer reviewed
DOI
https://doi.org/10.1038/s41467-021-23805-6
ISSN
2041-1723
Type
Journal article
Rights
Copyright © The Author(s) 2021. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
Description
This work was funded by Australian Research Council grant FL160100168 and Australian Research Council grant DP180100580.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/23397

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