Maps showing mineral resource assessment for vein and replacement deposits of base and precious metals, barite, and fluorspar, 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 chief purpose of which is to determine the . mineral resource potential of selected 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.