Determining the onset of the terrestrial geodynamo is fundamental in our understanding of the formation of a habitable Earth. Due to the lack of a >4 Ga rock record, detrital Hadean zircons may hold clues into the presence of a geodynamo on early Earth. However, these new results suggest that none of the nearly 4000 zircons analyzed in this study show evidence of an Headean-Eoarchean geodynamo and calls into question recent results that showed the contrary.
link to article:https://advances.sciencemag.org/content/6/15/eaav9634