Geochemical data from Precambrian meta-iron-formation and related rocks of the Keystone area, South Dakota

United States gold terranes — Part I

“…Studies of the gold content of Homestake-type iron-formation in the Blue Lead Mountain area north of the Keystone gold belt (Raymond, 1981;Raymond and others, 1975) and in areas to the north near Nemo (Fantone, 1983) confirm that gold is considerably enriched within the iron-formation and chert-rich rocks relative to other rock types. Fantone (1983) showed that the enrichments are considerably less than those noted in similar rocks in Australia and South Africa but comparable to those in greenstone belts in Canada.…”

Map showing locations of mines, prospects, and patented mining claims, and classification of mineral deposits in parts of the Iron Mountain and Hayward 7 1/2-minute Quadrangles, Black Hills, South Dakota

“…SimiJarly, a part of fl quadrangle may have many prospect s that are not shown on this map because the original source of information did not map prospect pits, Geologic. data for the map are from Aspouri(l939), Brandenburg (1932), Cerny (1982), Cerny and others (1982), Christiansen (1984), Darton and Paige (1925), DeWitt and others (1986), Kleinkopf and Redden (1975), Kulp andothers ( 1956}, • Lindgard andRoberts ( 1970), Modisi ( 1982), Norton (1976), Norton and o thers -(1964), others (1953), Rap p (1970), Raymond ( 1981), Redden ( 1975), Redden and Norton (1975), Redden, Norton, and McLaughlin (1982), Shearer, Papike, and Laul (1987), , Tullis (1939), Wiringa (1932), andZeltner (1977).…”

Mineral resource potential and geology of the Black Hills National Forest, South Dakota and Wyoming with a section on salable commodities

“…17), area A6 has a low potential for a medium-size deposit. The iron-formation in the region is mostly sulfide and silicate facies; it contains anomalous concentrations of copper, silver, gold, and molybdenum (Raymond, King, and Norton, 1975;Raymond, 1981), which might be byproducts of iron production.…”

“…Mines in the central and southern parts of C12 include the Bismark, Ida-Florence, and Bullion, which contain deposits similar to those at .Rochford. In the northern part, sulfide-facies ironformation within slate contains anomalous concentrations of copper and molybdenum (Raymond, King, and Norton, 1975;Raymond, 1981), two elements not normally associated with the gold and silver mineralization. Mines in the northern area include the Dakota and Calumet.…”