Tucson, AZ: U.S. Department of the Interior, Bureau of Mines, IC 7990, 1961 Jan; :1-178
This paper is one of a series covering mineral resources of the Nation. It describes briefly most of the known manganese deposits of eastern Arizona, which for the purpose of this report includes the counties of Navajo, Apache, Gila, Graham, Greenlee, Pinal, Pima, Santa Cruz, and Cochise. With few exceptions, these descriptions are the result of field examinations by the writers. Work on this paper was begun in May 1956, and in the following 18 months 151 deposits were examined. The distribution of the deposits by counties is as follows: 1 in Navajo, and 1 in Apache, 37 in Gila, 4 in Graham, 13 in Greenlee, 25 in Pinal, 13 in Pima, 12 in Santa Cruz, and 45 in Cochise. In surveyed areas the locations of the deposits are described by section, township, and range and in unsurveyed areas, by approximate projections of these subdivisions. The township and range numbers refer to the Gila and Salt River base and meridian. The history, production, ownership, geologic setting, and mining methods used are discussed for most of the deposits that were visited. Probably, some occurrences have been overlooked, but all of the principal ones have been examined. Ore dressing studies were made of typical ores from several of the larger districts. The work was performed in the laboratory of the Bureau of Mines Tucson Metallurgy Research Laboratory. The results of these studies are given with the descriptions of the deposits from which the samples were taken.
Tucson, AZ: U.S. Department of the Interior, Bureau of Mines, IC 7990