The Elk Creek Carbonatite, located in southeastern Nebraska, is an intrusive complex of carbonatite and related rocks and is host to significant niobium and rare earth element (REE) mineralization. The Elk Creek Carbonatite is evidenced by diamond drilling in an oval-shaped magnetic and gravity anomaly approximately 7 kilometres in diameter, making it one of the largest known carbonatite complexes. According to the US Geological Survey, “The Elk Creek carbonatite, located southeast of Lincoln, NE, has the potential to be one of the largest global resources of niobium and rare earth elements (REE)” (http://water.usgs.gov/wid/html/ne.html).

Image Credit: Quantum Rare Earth Developments.

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