Nanoparticulate apatite and greenalite in oldest, well-preserved hydrothermal vent precipitates
Birger Rasmussen,
Janet R. Muhling,
Nicholas J. Tosca
Abstract:Paleoarchean jaspilites are used to track ancient ocean chemistry and photoautotrophy because they contain hematite interpreted to have formed following biological oxidation of vent-derived Fe(II) and seawater P-scavenging. However, recent studies have triggered debate about ancient seawater Fe and P deposition. Here, we report greenalite and fluorapatite (FAP) nanoparticles in the oldest, well-preserved jaspilites from the ~3.5-billion-year Dresser Formation, Pilbara Craton, Australia. We argue that both phas… Show more
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