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dc.contributor.authorTaylor, Richard
dc.contributor.authorReddy, Steven
dc.contributor.authorSaxey, David
dc.contributor.authorRickard, William
dc.contributor.authorTang, F.
dc.contributor.authorBorlina, C.S.
dc.contributor.authorFu, R.R.
dc.contributor.authorWeiss, B.P.
dc.contributor.authorBagot, P.
dc.contributor.authorWilliams, H.M.
dc.contributor.authorHarrison, R.J.
dc.date.accessioned2023-06-12T07:09:02Z
dc.date.available2023-06-12T07:09:02Z
dc.date.issued2023
dc.identifier.citationTaylor, R.J.M. and Reddy, S.M. and Saxey, D.W. and Rickard, W.D.A. and Tang, F. and Borlina, C.S. and Fu, R.R. et al. 2023. Direct age constraints on the magnetism of Jack Hills zircon. Science Advances. 9 (1): eadd1511.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/92421
dc.identifier.doi10.1126/sciadv.add1511
dc.description.abstract

A potential record of Earth’s magnetic field going back 4.2 billion years (Ga) ago is carried by magnetite inclusions in zircon grains from the Jack Hills. This magnetite may be secondary in nature, however, meaning that the magnetic record is much younger than the zircon crystallization age. Here, we use atom probe tomography to show that Pb-bearing nanoclusters in magnetite-bearing Jack Hills zircons formed during two discrete events at 3.4 and <2 Ga. The older population of clusters contains no detectable Fe, whereas roughly half of the younger population of clusters is Fe bearing. This result shows that the Fe required to form secondary magnetite entered the zircon sometime after 3.4 Ga and that remobilization of Pb and Fe during an annealing event occurred more than 1 Ga after deposition of the Jack Hills sediment at 3 Ga. The ability to date Fe mobility linked to secondary magnetite formation provides new possibilities to improve our knowledge of the Archean geodynamo.

dc.languageeng
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleDirect age constraints on the magnetism of Jack Hills zircon
dc.typeJournal Article
dcterms.source.volume9
dcterms.source.number1
dcterms.source.startPage
dcterms.source.issn2375-2548
dcterms.source.titleScience Advances
dc.date.updated2023-06-12T07:09:01Z
curtin.departmentSchool of Earth and Planetary Sciences (EPS)
curtin.departmentJohn de Laeter Centre (JdLC)
curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidReddy, Steven [0000-0002-4726-5714]
curtin.contributor.orcidSaxey, David [0000-0001-7433-946X]
curtin.contributor.orcidRickard, William [0000-0002-8118-730X]
curtin.contributor.researcheridReddy, Steven [A-9149-2008]
curtin.contributor.researcheridSaxey, David [H-5782-2014]
curtin.contributor.researcheridRickard, William [E-9963-2013]
curtin.identifier.article-numbereadd1511
dcterms.source.eissn2375-2548
curtin.contributor.scopusauthoridReddy, Steven [7402263354]
curtin.contributor.scopusauthoridSaxey, David [15059256300]
curtin.contributor.scopusauthoridRickard, William [35171231700]
curtin.contributor.scopusauthoridTaylor, Richard [55751743702]
curtin.repositoryagreementV3


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