The Outlook for the United States Phosphate Rock Industry and Its Place in the World.
Soc Min Eng AIME Preprint 85-116 1985 :11 pages
The United States has traditionally been the world's largest producer and net exporter of phosphate rock and related fertilizer products with the exception of rock exports from Morocco. In recent years, however, U.S. producers have faced increasing competition from operations in foreign countries, leaving the future position of the U.S. phosphate industry as a leader in the world markets somewhat less certain. This paper reviews the U.S. phosphate rock industry in relation to its known demonstrated reserves, its historical and present production and export levels, and its future mining potential. The paper includes an analysis of the availability of phosphate rock in the United States represented by cost-tonnage relationships.
Soc. Min. Eng., AIME Preprint 85-116, 1985, 11 PP.