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Multi-domain magnetic particles in speleothems as a proxy for past cave-stream flooding: A 33 kyr record from central North Island, Aotearoa New Zealand

https://doi.org/10.1016/j.quascirev.2025.109289

Fox, Bethany RS; Lascu, Ioan; Harrison, Richard; Pearson, Andrew R; Hellstrom, John; Breitenbach, Sebastian FM; Einsle, Joshua F; Muraszko, Joy; Hartland, Adam (May 2025, Quaternary Science Reviews)

Free, publicly-accessible full text available May 1, 2026
Reevaluating the evidence for a Hadean-Eoarchean dynamo

https://doi.org/10.1126/sciadv.aav9634

Borlina, Cauê S.; Weiss, Benjamin P.; Lima, Eduardo A.; Tang, Fengzai; Taylor, Richard J.; Einsle, Joshua F.; Harrison, Richard J.; Fu, Roger R.; Bell, Elizabeth A.; Alexander, Ellen W.; et al (April 2020, Science Advances)
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The time of origin of the geodynamo has important implications for the thermal evolution of the planetary interior and the habitability of early Earth. It has been proposed that detrital zircon grains from Jack Hills, Western Australia, provide evidence for an active geodynamo as early as 4.2 billion years (Ga) ago. However, our combined paleomagnetic, geochemical, and mineralogical studies on Jack Hills zircons indicate that most have poor magnetic recording properties and secondary magnetization carriers that postdate the formation of the zircons. Therefore, the existence of the geodynamo before 3.5 Ga ago remains unknown.
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Secondary magnetic inclusions in detrital zircons from the Jack Hills, Western Australia, and implications for the origin of the geodynamo

https://doi.org/10.1130/G39938.1

Weiss, Benjamin P.; Fu, Roger R.; Einsle, Joshua F.; Glenn, David. R.; Kehayias, Pauli; Bell, Elizabeth A.; Gelb, Jeff; Araujo, Jefferson F.D.F.; Lima, Eduardo A.; Borlina, Cauê S.; et al (March 2018, Geology)

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Evaluating the paleomagnetic potential of single zircon crystals using the Bishop Tuff

https://doi.org/10.1016/j.epsl.2016.09.038

Fu, Roger R.; Weiss, Benjamin P.; Lima, Eduardo A.; Kehayias, Pauli; Araujo, Jefferson F.D.F.; Glenn, David R.; Gelb, Jeff; Einsle, Joshua F.; Bauer, Ann M.; Harrison, Richard J.; et al (January 2017, Earth and Planetary Science Letters)

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