Uranium in the Upper Cambrian black shale of Sweden

Trace Elements Investigations 495
This report concerns work done on behalf of the Division of Raw Materials of the U.S. Atomic Energy Commission



The Peltura zone of the Upper Cambrian black shales of Sweden contains about 0.02 percent uranium. Maximum amounts are present in rocks deposited in an embayment in the sea and in rocks in or closely adjacent to that part of the vertical sequence that contains maximum amounts of distillable oil, total organic matter, pyrite, and a black highly uraniferous kerogen called "kolm". Available data suggest that the precipitation of uranium is favored by a low redox potential and that the uranium in the shale matrix may be in fine-grained kolm.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Uranium in the Upper Cambrian black shale of Sweden
Series title Trace Elements Investigations
Series number 495
DOI 10.3133/tei495
Edition -
Year Published 1955
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Description 20 p.
Country Sweden
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