Johnson et al. 2022. Giant impacts and the origin and evolution of continents.

Creator(s):
Johnson, Tim E; ORCID: 0000-0001-8704-4396
Kirkland, Christopher L; ORCID: 0000-0003-3367-8961
Lu, Yongjun; ORCID: 0000-0002-6490-0679
Smithies, Hugh; ORCID: 0000-0003-1878-597X
Brown, Michaeal; ORCID: 0000-0003-2187-616X
Hartnady, Michael; ORCID: 0000-0001-5297-9925
Abstract:
Using the oxygen isotope compositions of dated magmatic zircon, we show that the Pilbara Craton in Western Australia, Earth’s best-preserved Archaean (4.0–2.5 billion years ago; Ga) continental remnant, was built in three stages. Stage 1 zircons (3.6–3.4 Ga) form two age clusters with one-third recording sub-mantle δ18O, indicating crystallization from evolved magmas derived from hydrothermally-altered basaltic crust like that in modern-day Iceland. Stage 2 (3.4–3.0 Ga) zircons mostly have mantle-like δ18O and crystallized from parental magmas formed near the base of the evolving continental nucleus. Stage 3 (<3.0 Ga) zircons have above-mantle δ18O, indicating efficient recycling of supracrustal rocks.
How to cite this dataset:
Johnson, T. E., Kirkland, C. L., Lu, Y., Smithies, H., Brown, M., Hartnady, M., 2022. Johnson et al. 2022. Giant impacts and the origin and evolution of continents., Version 1.0. Interdisciplinary Earth Data Alliance (IEDA). https://doi.org/10.26022/IEDA/112307. Accessed 2024-05-30.
DOI Creation Date:
2022-06-06
Related
Publication(s):
Smithies, R. H., Lu, Y., Kirkland, C. L., Johnson, T. E., Champion, D. C., Mole D. R., Martin, L., Jeon, H., Wingate, M. T. D. & Johnson, S. P. (2021), Oxygen isotopes trace the origins of Earth’s earliest continental crust, Nature(592): 70–75.

Johnson, T. E., Kirkland, C. L., Lu, Y., Smithies, R. H., Brown, M. & Hartnady, M. (2021), Giant impacts and the origin and evolution of continents, Nature(593): xxx–xxx.
License:
Creative Commons Attribution-ShareAlike 4.0 International [CC-BY-SA-4.0]
Funding source(s):
ARC
Keyword(s):
Coverage Scope: Regional (Continents, Oceans)
Geographic Location: West Australian Craton
User Contributed Keyword(s):
Archaean, early Earth, giant impacts, oxygen isotopes, Pilbara Craton
Data Available On:
2022-06-28
Resource Type:
Collection
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2307-1_SupplementaryDataTables1-3.xlsx
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2307-2_216545_ppl_150dpi_.jpg
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2307-3_216545_xpl_150dpi_.jpg
25.01 MB
2307-4_216594_ppl_150dpi_.jpg
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2307-5_261594_xpl_150dpi_.jpg
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