Detailed Magnetic Surveys in the Star Range, Beaver County, Utah

Vertical-field ground magnetic data were obtained in four areas of the Star Range, and interpreted in terms of causative geologic structures. Eight magnetic profiles were taken over the Milford Flat intrusive body, and provided the basis for interpreting the intrusive structure under the alluvium. Gridded magnetic data were obtained in the vicinity of the Wild Bill mine. No extensive zones of contact mineralization are apparent in this data; an anomaly in the south-central portion of the grid is attributed to an upward protrusion of the local intrusive body. Along the southeastern contact of the Shauntie intrusive body, magnetic data show four areas of appreciable magnetite mineralization ranging from eight to twenty-five feet thick. Data collected south of the exposed Shauntie intrusive show an anomaly of uncertain origin that probably reflects the buried southeastern contact zone.