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Hydrogeochemical and stream sediment reconnaissance basic data for Alliance NTMS quadrangle, Nebraska and South Dakota

Technical Report ·
OSTI ID:7089848

Results of a reconnaissance geochemical survey of the Alliance quadrangle are reported. Field and laboratory data are presented for 543 groundwater and 523 stream sediment samples. Statistical distributions and symbol plots for uranium and possible uranium-related variables are enclosed. A generalized geologic map and producing horizon map for the survey area is provided. Pertinent geologic factors which may be of significance in evaluating the potential for uranium mineralization are briefly discussed. Groundwater data indicate that uranium concentrations above the 85th percentile occur primarily in the Colorado Group, Pierre Shale, and White River Group in the northern third of the quadrangle, and in the closed-basin area in southern Sheridan County. The White River Group is the most favorable geologic unit for potential uranium mineralization in the Alliance Quadrangle. Stream sediment data indicate that uranium values above the 85th percentile are associated with the Cretaceous and Oligocene sediments of the Colorado Group, Pierre Shale, and White River Group.

Research Organization:
Oak Ridge Gaseous Diffusion Plant, TN (USA)
DOE Contract Number:
AC13-76GJ01664
OSTI ID:
7089848
Report Number(s):
GJBX-219(80); K/UR-141
Country of Publication:
United States
Language:
English