|Main commodities||Th; U|
|Ore minerals||thorite; uranothorianite|
|Quadrangle map, 1:250,000-scale||CA|
|Quadrangle map, 1:63,360-scale||B-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 1,600 feet, approximately 2.5 miles north of Granite Mountain. The site is in section 19, T. 1 N., R. 12 W., of the Kateel River Meridian. Cobb, 1972 (MF-389), location 33.|
Geologic descriptionAt this occurrence, uranothorite and thorite(?) occur in stream sediments overlying monzonite or syenite of the Late Cretaceous Granite Mountain pluton (Gault and others, 1953). Samples from prospect pits indicate that the amount of radioactivity decreases with depth. The highest equivalent uranium value from the samples was 0.088 percent.
|Geologic map unit||(-161.2326410412, 65.4793290717533)|
|Mineral deposit model||Radioactive minerals in stream sediments.|
|Age of mineralization||Late Cretaceous.|
|Workings or exploration||In 1947, the U.S. Geological Survey sampled the creek to evaluate the radioactive mineral potential.|
|Indication of production||None|
Additional commentsStream gradient over 200 feet per mile.
Cobb, E.H., 1972, Metallic mineral resources map of the Candle Quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-389, 1 sheet, scale 1:250,000.
Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Candle, Holy Cross, Norton Bay, Nulato, and Unalakleet quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-866, 102 p.
|Reporters||Anita Williams (Anchorage, AK)|
|Last report date||1/12/2000|