Airborne gamma-ray spectrometer and magnetometer survey, Jordan Quadrangle, Montana. Final report

Technical Report · Wed Dec 31 23:00:00 EST 1980

OSTI ID:5516900

Thirty-one uranium anomalies meet the minimum statistical requirements as defined in Volume I. These anomalies are tabulated and are shown on the Uranium Anomaly Interpretation Map. Anomalies No. 1 to No. 3, and No. 10 to No. 12 are over areas underlain by the Tertiary Fort Union formation (Tftr, Tfu, Tft, Tfl). The lignites in this formation are commonly uranium-bearing. Anomaly No. 4 is over an area underlain by late Cretaceous Bearpaw Shale (Kb) and Hell Creek formation (Khc). Anomalies No. 5 and No. 6 are over areas underlain by late Cretaceous Bearpaw Shale (Kb). Anomaly No. 7 is over an area underlain by late Cretaceous Bearpaw Shale (Kb) and Fox Hills Sandstone (Kfh). Amonalies No. 8, No. 14 to No. 16, and No. 23 to No. 30 are over areas underlain by late Cretaceous Bearpaw Shale (Kb). Anomaly No. 9 is over an area underlain by late Cretaceous Fox Hills Sandstone (Kfh). Anomalies No. 13 and No. 20 are over areas underlain by the late Cretaceous Hell Creek formation (Khc) and the Tertiary Fort Union formation (Tfl). The lignite seams in both these formations are commonly uranium-bearing. Anomalies No. 17 to No. 18, and No. 21 are over areas underlain by the late Cretaceous Hell Creek formation (Khc). Lignite seams in this formation are commonly uranium-bearing. Anomaly No. 19 is over an area underlain by the Tertiary Fort Union formation (Tft). The lignite seams in this formation are commonly uranium-bearing. Anomaly No. 22 is over an area underlain by late Cretaceous Bearpaw Shale (Kb), Fox Hills Sandstone (Kfh), and the Hell Creek formation (Khc). Anomaly No. 31 is over an area underlain by Recent alluvium (Qal).

• Research Organization: High Life Helicopters, Inc., Puyallup, WA (USA); QEB, Inc., Lakewood, CO (USA)
• DOE Contract Number: AC13-76GJ01664
• OSTI ID: 5516900
• Report Number(s): GJBX-180-81-Vol.2C; ON: DE81025700
• Country of Publication: United States
• Language: English

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