Eric Siciliano Rego

Eric Siciliano Rego is a Postdoctoral Research Scientist in the Geochemistry Division at Lamont-Doherty Earth Observatory, Columbia University. His research integrates isotopic measurements, laboratory experiments, and field observations to reconstruct how Earth's ocean chemistry and redox conditions have changed through time. Working across a range of sedimentary archives, including banded iron formations, organic-rich shales, and marine carbonates, he uses iron, carbon, phosphorus, and thallium geochemistry to investigate the co-evolution of ocean oxygenation, microbial life, and nutrient cycling during critical intervals of Earth history, including the Neoarchean ocean preceding the Great Oxidation Event, Neoproterozoic glaciations, and Eocene warming events. At Lamont, he is currently investigating zirconium isotopes as a potential new paleoceanographic proxy, examining how Zr fractionates across modern marine sources and sinks to establish the geochemical framework needed for its application to ancient sedimentary records.