The Permian Phosphoria Formation of southeastern Idaho hosts one of the largest phosphate deposits in the world. Despite the economic significance of this Formation, the fine-grained nature of the phosphorite has discouraged detailed mineralogical characterization and quantification studies. Recently, selenium and other potentially toxic trace elements in mine wastes have drawn increased attention to this formation, and motivated additional study. This study uses powder X-ray diffraction (XRD), with Rietveld quantification software, to quantify and characterize the mineralogy of composite channel samples and individual samples collected from the stratigraphic sections measured by the U.S. Geological Survey in the Meade Peak Member of the Permian Phosphoria Formation at the Enoch Valley mine on Rasmussen Ridge, approximately 15 miles northeast of Soda Springs, Idaho. |
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README file listing all files available for download | 4 KB |
Open-File Report 02-125 in Portable Document Format (PDF) Get Adobe Acrobat Reader to view pdf files |
516 KB |
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Maintained by: Carolyn Donlin
Created: 6-11-01
Last modified: 5-07-02 (df)
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| Department of the Interior | U.S. Geological Survey | Geologic Division | Western Mineral Resources |