| Online link | http://pubs.usgs.gov/sir/2010/5070/j/ |
|---|---|
| Description | Carbonatite and alkaline intrusive complexes, as well as their weathering products, are the primary sources of rare earth elements. A wide variety of other commodities have been exploited from carbonatites and alkaline igneous rocks including |
| Originators | Verplanck, Philip L.; van Gosen, Bradley S.; Seal, Robert R. II; and McCafferty, Anne E. |
| Publication | U.S. Geological Survey Scientific Investigations Report 2010-5070-J |