National Uranium Resource Evaluation Program. Data report: Kettle Falls Area, Washington

This abbreviated data report presents results of water and stream sediment detailed study in the Kettle Falls Dome area of northeastern Washington State. Stream sediment samples were taken at 2415 sites. Ground water samples were collected at 414 sites. Neutron activation analysis (NAA) results are given for uranium and 16 other elements in sediments, and for uranium and 9 other elements in waters. Mass spectrometry results are given for helium in ground water. Field measurements and observations are reported for each site. Uranium concentrations in the stream sediment samples from the Kettle Falls Dome study area range from a minimum of 0.4 ppM to a maximum of 174.3 ppM, with a mean of 4.86 ppM. Samples in the central and western sections of the area have generally higher uranium, thorium, and rare earth concentrations, which may be associated with granitic gneisses in the study area. The highest uranium value and uranium/thorium ratio occur in a sample from the south-central part of the Republic 15' quadrangle. Due to the poor coverage in all but the eastern part of the study area, ground water analyses do not aid in the interpretation of the higher uranium concentrations in sediment samples from the central and western parts of the area