Mineralogical characterization of strata of the Meade Peak phosphatic shale member of the Permian Phosphoria Formation: Channel and individual rock samples of measured section J and their relationship to measured sections A and B, central part of Rasmussen Ridge, Caribou County, Idaho
Open-File Report
2002-125
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Abstract
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.
Suggested Citation
Knudsen, A.C., Gunter, M.E., Herring, J., and Grauch, R., 2002, Mineralogical characterization of strata of the Meade Peak phosphatic shale member of the Permian Phosphoria Formation: Channel and individual rock samples of measured section J and their relationship to measured sections A and B, central part of Rasmussen Ridge, Caribou County, Idaho: U.S. Geological Survey Open-File Report 2002-125, Report: 38 p.; Readme, https://doi.org/10.3133/ofr02125.
ISSN: 2331-1258 (online)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Mineralogical characterization of strata of the Meade Peak phosphatic shale member of the Permian Phosphoria Formation: Channel and individual rock samples of measured section J and their relationship to measured sections A and B, central part of Rasmussen Ridge, Caribou County, Idaho |
| Series title | Open-File Report |
| Series number | 2002-125 |
| DOI | 10.3133/ofr02125 |
| Year Published | 2002 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Contributing office(s) | Geology, Minerals, Energy, and Geophysics Science Center |
| Description | Report: 38 p.; Readme |
| Country | United States |
| State | Idaho |
| County | Caribou County |
| Other Geospatial | Rasmussen Ridge |
| Additional Online Files (Y/N) | Y |