Rare-earth element mineralization and formation of the Iron Hill carbonatite complex, Gunnison County, Colorado, USA
The Iron Hill carbonatite complex is located in the Powderhorn district in Gunnison County, Colorado, USA, roughly 35 km south-southwest of the city of Gunnison. The complex consists of a ringed series of silica-deficient alkalic igneous rocks with a carbonatite stock at the center. The genesis of Rare Earth Element (REE)-enriched igneous complexes like Iron Hill is contentious, and the processes involved with REE enrichment at these complexes are poorly understood. The complex is one of the largest known niobium and titanium endowments in the United States and contains significant amounts of ...