Maps showing mineral resource assessment for copper and molybdenum in porphyry and stockwork deposits and for tungsten, iron, gold, copper, and silver in skarn deposits, Dillon 1° x 2° quadrangle, Idaho and Montana

Abstract

This report is one of a series of reports that present, chiefly with maps at a scale of 1:250,000 and 1 :500,000, various aspects of the geology, geochemistry, geophysics, and mineral resources of the Dillon 1 °X2° quadrangle, southwestern Montana and east-central Idaho (fig. 1 ). These studies were made largely under the Conterminous United States Mineral Assessment Program (CUSMAP), the primary purpose of which is to determine the mineral resource potential of selected •1 °X2° quadrangles by means of a multidisciplinary approach. CUSMAP is intended to provide information on mineral resources to assist Federal, state, and local governments in formulating minerals policy and land-use policy and to produce sound scientific data that may be of value to private industry and the general public in mineral exploration and development.