OF-75-00 Fluorspar Deposits in Colorado Download Publication Details A poorly-scanned and poorly-rendered digital PDF map superseded by the production of map MI-12. Digital PDF download. OF-75-00D From the Introduction: Increased fluorine consumption (U.S. Bureau of Mines, 1946-1971) coupled with limited proved reserves has stimulated extensive exploration for fluorine and intensive research into developing new sources of fluorine or substitutes. A summary of the distribution, geochemical and geologic environments, and production history of selected fluorspar occurrences, deposits, and districts is provided here with the hope that this information will help to stimulate exploration and discovery of additional fluorspar resources in Colorado to augment our dwindling domestic supply. Citations Brady, Bruce T. “OF-75-00 Fluorspar Deposits in Colorado.” Mineral Resources, 1:500,000. Open File Reports. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1975. https://doi.org/10.58783/cgs.of7500.uixz8453. CGS Publications. https://coloradogeologicalsurvey.org/publications/fluorspar-deposits-colorado-1975-2/.