Twenty localities in the South Shetland Islands, the Gerlache Strait, and southern Anvers Island were examined for the potential as sites of "Andean-type" porphyry and related base and precious metal mineralization. Field studies consisted of geologic mapping and sampling for petrographic studies and trace element analysis (Cu, Pb, Zn, Au, Ag, Mo, W). Copper, lead, and zinc are present in most of the localities that were examined, and molybdenum, gold, and silver also may be important components of the mineralization. Four localities have been identified as possible sites of porphyry and related base and precious metal mineralization: (1) east of Palmer Station, southwestern Anvers Island; (2) along the coast north of Bahia Frei in the Gerlache Strait; (3) northeast of False Bay, Livingston Island; and (4) north of Johnsons Dock (Hurd Peninsula), Livingston Island. Additional study will be required to define the resource potential of these localities.