Precambrian Research

• Zircon U-Pb ages from the RAP (950–910 Ma) support protracted magmatic activity. • Zircon grains from anorthosites come from light-coloured rims around the HAOMs. • Hf isotopes (εHf i = -4.1 to + 5.5) support mixed mantle and crustal contributions. • Progressively more juvenile Hf isotopic signatures are found in younger intrusions. • The RAP formed in an extensional setting with sustained mafi…

• High REE (∼2000 ppm) Dzhurzhivka phosphorites challenge age-based prospectivity. • Terrigenous contamination indicated by low Y/Ho ratio. • MREE enrichment during early diagenesis, LREE depletion during late diagenesis. • Positive Eu anomalies indicate upwelling of hydrothermally-influenced, P-rich waters. • Sediment diagenesis, not seawater composition, led to REE phosphorite endowment. Late E…

• Geochemical data reveal nutrient- and oxygen-rich seawater in the 2.1 Ga Francevillian Basin. • Paleoproterozoic phosphate and zinc levels rivaled or exceeded those of Cambrian oceans. • Key chemical conditions for complex life existed over a billion years earlier than thought. • Nutrient-rich window coincides with Francevillian macrobiota, challenging evolutionary and environmental timelines. …

• Contrasting geodynamic mechanisms simultaneously drive craton growth. • Case study into the evolution of the western Yilgarn Craton. • Early history of the South West Terrane is not shared across terrane boundarys. • Documentation of a Paleoarchean history in the South West Terrane. An outstanding question in Archean geodynamics is how the earliest continental crust was formed and stabilised, a…