Magnetic Titanohematite Minerals in Uranium-Bearing Sandstones
Open-File Report
77-355
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Abstract
Detrital grains of the rhombohedral ilmenite (FeT1O3)--hematite (Fe2O3) solid solution series (titanohematites) have been identified by thermomagnetic, reflection microscopic, and X-ray diffraction analysis in six uranium-bearing sandstones in the western United States. Many of the titanohematites are ferrimagnetic and have Curie temperatures ranging from about 70 Deg C to 220 Deg C. Magnetic titanohematite is commonly more abundant than magnetite in many samples and, therefore, should be considered as a major source of the permanent magnetization in these units.
Suggested Citation
Reynolds, R., 1977, Magnetic Titanohematite Minerals in Uranium-Bearing Sandstones: U.S. Geological Survey Open-File Report 77-355, 23 p., https://doi.org/10.3133/ofr77355.
ISSN: 2331-1258 (online)
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Magnetic Titanohematite Minerals in Uranium-Bearing Sandstones |
| Series title | Open-File Report |
| Series number | 77-355 |
| DOI | 10.3133/ofr77355 |
| Year Published | 1977 |
| Language | ENGLISH |
| Publisher | U.S. Geological Survey |
| Contributing office(s) | U.S. Geological Survey |
| Description | 23 p. |