National Uranium Resource Evaluation: St. Cloud Quadrangle, Minnesota

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Description

From Introduction: "The St. Cloud NTMS Quadrangle, Minnesota, was evaluated to identify and delineate areas and geologic units that have characteristics favorable for the occurrence of uranium deposits."

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iv, 21 p. : ill. (1 folded), maps (17 folded)

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Morey, G. B.; Southwick, D. L.; Lively, R. S. & Beltrame, R. J. June 1982.

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From Introduction: "The St. Cloud NTMS Quadrangle, Minnesota, was evaluated to identify and delineate areas and geologic units that have characteristics favorable for the occurrence of uranium deposits."

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iv, 21 p. : ill. (1 folded), maps (17 folded)

Notes

Abstract: Uranium resources of the St. Cloud Quadrangle, Minnesota, were evaluated to a depth of 1500 m (5,000 ft) using all available surface and subsurface geologic information. No uranium occurrences have been reported in the literature, and none were found in the quadrangle during this evaluation. Areas of anomalous radioactivity, interpreted from the preliminary appraisal of an aerial radiometric survey, and geochemical anomalies, interpreted from a hydrogeochemical and stream-sediment reconnaissance, were investigated and found to be related to compositional differences in Quaternary drift, which mantles almost the entire quadrangle. No specific areas favorable for uranium deposits were identified in the quadrangle. The basal rocks of the lower Proterozoic Mille Lacs Group are a hypothetically favorable environment for deposits of the quartz-pebble conglomerate class outside the quadrangle boundaries. The areas favorable for uranium concentration in the basal Mille Lacs Groups are northeast of the St. Cloud Quadrangle, where the rocks are less severely deformed and better exposed. Eight other geologic environments were delineated in the pre-Quaternary rocks of the quadrangle. Of these, five were classified as unfavorable, and three environments were not evaluated. Recommendations for improving the reliability of this evaluation include detailed aeromagnetic and electrical-field surveys and diamond drilling of the basal Mille Lacs Group, the diamond drilling of 15 to 20 stratigraphic test holes for detailed subsurface information regarding the favorability of the now-unevaluated Cretaceous section for uranium deposition.

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  • OCLC: 981766947
  • SuDoc Number: E 1:28/PGJ/F-048(82)
  • Report No.: PGJ/F-048(82)
  • Accession or Local Control No: NL 15-7
  • Archival Resource Key: ark:/67531/metadc957752

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  • National Uranium Resource Evaluation: St. Cloud Quadrangle, Minnesota, Appendix A-B Uranium Occurrences, ark:/67531/metadc1228171

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National Uranium Resource Evaluation: St. Cloud Quadrangle, Minnesota, Appendix A-B (Dataset)

National Uranium Resource Evaluation: St. Cloud Quadrangle, Minnesota, Appendix A-B

Appendices containing data on uranium availability in the St. Cloud Quadrangle to accompany a report on U.S. uranium resources in Minnesota.

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National Uranium Resource Evaluation: St. Cloud Quadrangle, Minnesota, Appendix A-B Uranium Occurrences, ark:/67531/metadc1228171

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  • June 1982

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  • Oct. 25, 2017, 10:43 p.m.

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  • Sept. 20, 2019, 1:05 p.m.

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  • N:46.0, E:-94.0, S: 45.0, W:-96.0

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Morey, G. B.; Southwick, D. L.; Lively, R. S. & Beltrame, R. J. National Uranium Resource Evaluation: St. Cloud Quadrangle, Minnesota, report, June 1982; (https://digital.library.unt.edu/ark:/67531/metadc957752/: accessed June 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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