[en] Results of a reconnaissance geochemical survey of the Iron Mountain Quadrangle, Michigan; Wisconsin are reported. Field and laboratory data are presented for 479 groundwater samples, 369 stream sediment samples, and 389 stream water samples. Statistical and areal distributions of uranium and other possible uranium-related variables are displayed. A generalized geologic map of the survey area is provided, and pertinent geologic factors which may be of significance in evaluating the potential for uranium mineralization are briefly discussed. Results from groundwater, stream sediment, and stream water samples delineate several areas which appear favorable for possible uranium mineralization within the Iron Mountain Quadrangle. Areas associated with the Wolf River Batholith and the McCaslin units are the most prominent. Other notable areas are present in the northeast and the southwest corners of the quadrangle. Both of these areas are dominated by Precambrian igneous and metamorphic rocks, which are quite variable in composition