Scientific Investigations Report 2007-5039
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007-5039
We would like to thank Nora Shew and Dan Grunwald for the preparation of the map figures and the GIS files from which they were derived; Bruce Gamble for help in identifying appropriate models; Art Schultz for his contributions to the expert panel and economic evaluation processes; and Joe Duval (USGS retired) for his help in successfully modifying the EMINERS program. Technical reviews by Don Singer and Travis Hudson helped to clarify many economic and geologic aspects of the paper.