Federal Project Grant Award Summary

The National Science Foundation's Division of Earth Sciences awarded a $268,549 Project Grant to the University of Michigan (effective May 1, 2026 through April 30, 2029) under the Geosciences program (CFDA 47.050) to conduct collaborative research on the origin of Precambrian iron formations. The primary deliverable is a series of controlled laboratory experiments designed to test competing hypotheses regarding iron silicate mineral precipitation pathways in ancient seawater. Specifically, the research will precipitate the iron(II) silicate mineral greenalite under simulated Precambrian seawater conditions while systematically monitoring iron isotopic fractionation and iron-to-manganese ratios generated by each formation scenario. These experimental results will generate chemical fingerprint data that can be compared against existing geochemical signatures found in natural iron formation deposits, thereby resolving long-standing debates about whether primary iron oxides or iron silicates represent the original mineral precipitates in Earth's ancient oceans.

Beyond the core experimental research products, the grant supports workforce development within the Earth sciences through the participation of graduate and undergraduate students in all research activities. The award will produce peer-reviewed scientific publications documenting experimental methodologies, findings, and implications for understanding early Earth geochemistry and potential ancient ocean chemistry. These research outputs are expected to advance fundamental understanding of how Earth's largest iron ore reserves formed and illuminate the environmental conditions and potential biological activity present in Precambrian oceans.