Orientation Study of Central Arkansas. National Uranium Resource Evaluation Program. Hydrogeochemical and Stream-Sediment Reconnaissance

摘要

Samples of ground water, stream water, and sediment were Collected at 335 sites for an orientation study that included parts of the Ouachita Mountain and Gulf Coastal Plain regions in central Arkansas. Black shales, tuffs, and intrusive rocks, and the sediments of the Gulf Coastal Plain provide an environment that could be favorable to the formation of uranium deposits. The following field analyses were performed for all water samples (both ground water and stream water): pH, conductivity, total alkalinity, temperature, nitrate, ammonia, phosphate and sulfate. Additional water was collected, filtered, and reacted with a resin that was then analyzed by neutron activation analysis for U, Br, Cl, F, Mn, Na, Al and Dy. In addition, ground water samples were analyzed for He. The stream sediments were analyzed by neutron activation for U, Th, Hf, Ce, Fe, Mn, Sc, Ti, V, Al, Dy, Eu, La, Sm, Yb, and Lu. The report is issued in draft form, without detailed technical and copy editing. This was done to make the report available to the public before the end of the National Uranium Resource Evaluation. (ERA citation 08:004233)