National Uranium Resource Evaluation: Challis Quadrangle, Idaho

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From Introduction: "The Challis Quadrangle, in central Idaho between lat 44º and 45º N. and long 114º and 116º W. (Fig. 1), was evaluated to identify geologic environments and delineate areas that exhibit characteristics favorable for the occurrence of uranium deposits."

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vii, 65 p. : ill. (1 folded), maps (20 folded) ; 28 cm.

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Wopat, Michael A.; Siegmund, B. L. & Bernardi, M. L. July 1982.

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From Introduction: "The Challis Quadrangle, in central Idaho between lat 44º and 45º N. and long 114º and 116º W. (Fig. 1), was evaluated to identify geologic environments and delineate areas that exhibit characteristics favorable for the occurrence of uranium deposits."

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vii, 65 p. : ill. (1 folded), maps (20 folded) ; 28 cm.

Notes

Abstract: The geology of the Challis Quadrangle (1° x 2°), Idaho, was evaluated to identify environments and delineate areas favorable for the occurrence of uranium deposits. Determination of favorability was based upon criteria developed for the National Uranium Resource Evaluation program. Uranium occurrences were located, sampled, and described. The geology was reconnoitered, and reconnaissance geochemical samples were collected throughout the quadrangle. The geochemical samples, along with 594 samples collected by the U.S. Geological Survey during previous studies of parts of the quadrangle, were analyzed for uranium and other elements. Sites of some geochemistry anomalies indicated by the analyses were investigated and resampled. Selected examples of potentially favorable environments were examined in some detail. Results of the study show three environments to be favorable for uranium deposits. The basal sedimentary rocks of the Eocene Challis Volcanics are favorable for channel-controlled peneconcordant sandstone-type deposits in and near the Stanley uranium district and for non-marine carbonaceous shale deposits in the Ellis area. Rocks of the Cretaceous Idaho batholith in and near the Stanley uranium district are favorable for magmatic-hydrothermal deposits.

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  • OCLC: 981766482
  • SuDoc Number: E 1:28/PGJ/F-042(82)
  • Report No.: PGJ/F-042(82)
  • Archival Resource Key: ark:/67531/metadc957746

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Technical Report Archive and Image Library

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National Uranium Resource Evaluation: Challis Quadrangle, Idaho, Appendix A-F (Dataset)

National Uranium Resource Evaluation: Challis Quadrangle, Idaho, Appendix A-F

Appendices containing data on uranium availability and chemical analyses to accompany a report on U.S. uranium resources in the Challis Quadrangle, Idaho.

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National Uranium Resource Evaluation: Challis Quadrangle, Idaho, Appendix A-F, ark:/67531/metadc1228240

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  • July 1982

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  • Oct. 25, 2017, 10:43 p.m.

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  • June 26, 2020, 3:42 p.m.

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  • N:45.0, E:-114.0, S: 44.0, W:-116.0

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Wopat, Michael A.; Siegmund, B. L. & Bernardi, M. L. National Uranium Resource Evaluation: Challis Quadrangle, Idaho, report, July 1982; (https://digital.library.unt.edu/ark:/67531/metadc957746/: accessed July 15, 2025), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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