Uraniferous Coal and Carbonaceous Shale in Northeast Paraná, Brazil
Description:
From abstract: Uraniferous coal has been found in northeast Parana', Brazil, in the Rio Bonito formation of Pennsylvanian age. In the majority of coal samples taken the uranium oxide content ranges from 0.005 to 0.030 percent, but selected screened samples have contained as much as 0.45 percent uranium oxide. The sampled thickness of the coal seam ranges from 17 to 54 centimeters and averages 31 centimeters. Channel samples across the entire thickness of the coal zone were taken in two places. …
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Date:
January 1957
Creator:
Haynes, Donald D. & Pierson, Charles Thomas
Item Type:
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