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USA | |
- Devils Head Pegmatite Mining District
| Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 25 (Table A-1). |
- White Earth Mining District (Powderhorn Mining District)
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Verplanck, P. L., Farmer, G. L., Kettler, R. M., Lowers, H. A., Johnson, C. A., Koenig, A. E., & Blessington, M. J. (2022). Petrogenesis and Rare Earth Element Mineralization of the Elk Creek Carbonatite, Nebraska, USA. Ore Geology Reviews, 104953. Verplanck, P. l., Farmer, G. l., Kettler, R. M., Lowers, H. A., Koenig, A. E. and Blessington, M. J. (2014), Rare Earth Element Enrichments in the Elk Creek Carbonatite. Acta Geologica Sinica, 88: 466–467. USGS Open File report 2010-5220 |
Elk Creek Carbonatite, Elk Creek, Johnson County, Nebraska, USA