A deposit model for carbonatite and peralkaline intrusion-related rare earth element deposits

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