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United States Department Of. the Interior Geological UNITED STATES DEPARTMENT OF. THE INTERIOR GEOLOGICAL SURVEY Map, description and bibliography of the Mineralized Areas of the Basin and Range Province in Arizona By Stanley B. Keith 1 Lorraine Schnabel 2 , Ed DeWitt 2 Don E. Gest 3 . and Jan Wilt* Open-File Report 84-0086 1983 This report is preliminary and has not been reviewed for conformity with U.S. Geological survey editorial standards and stratigraphic nomenclature. Arizona Bureau of Geology and Mineral Technology; present address: MAGMACHEM Assoc., 5114 E. Tunder Dr., Phoenix, Arizona 85044 2U.S. Geological Survey, Denver, Colorado 80225 Arizona Bureau of Geology and Mineral Technology, 845 N. Park Avenue, Tucson, Arizona 85719 ^J.C. Wilt and Co., 3035 So. Shiela Ave., Tucson, Arizona 85746 Contents Page Introduction..............................................................1 Classification and nomenclature of the Mineralized Areas..................! Commodities and deposit descriptions......................................2 Sources of information....................................................2 Acknowledgements..........................................................2 References cited..........................................................5 Bibliography.............................................................47 Illustrations Plate 1. Map of the Mineralized Areas of the Basin and Range Province in Arizona..............................................in pocket Tables Table 1. Summary of deposit types of the Basin and Range Province in Arizona......................................................3 Table 2. Mineralized Areas of the Basin and Range Province in Arizona....6 Introduction The purpose of this report is twofold: first, to show mineralized areas within the Basin and Range province in Arizona that contain any of the following elements; copper, lead, zinc, molybdenum, iron, manganese, barium, mercury, gold, silver, platinum, beryllium, lithium, tungsten, tin, fluorine, vanadium, or uranium: second, to classify the areas on the basis of age and type of deposit rather than on geographical or political criteria. Excluded are areas that contain building materials, sand and gravel, placer deposits of various minerals, and areas that contain only iron deposits. The areas shown either (1) have produced ore (Keith and others, 1983), (2) have mine workings to suggest past production, (3) are described in publications that verify past production or drilled out reserves of ore, (4) are mentioned in unpublished reports that contain assay information indicating the presence of metals (Arizona Department of Mineral Resources, unpub. data), or (5) have been investigated by mining companies who have documented the presence of mineralized material. The map does not purport to delimit all the mineralized terrane within the Basin and Range province in Arizona, but rather delimits "Mineralized Areas", areas of known mineralization documented by one or more of the above sources. The boundaries of the Mineralized Areas on the map are, with some minor exceptions, the same as those of the Metallic Mineral Districts of Keith, Gest, and DeWitt (1983). Classification and nomenclature of the Mineralized Areas The Mineralized Areas on the map have been defined on the basis of geologic rather than geographic criteria. Therefore, the name of a given Mineralized Area may not be the same as the conventional Mining District name from older literature for the same geographical area. If an existing Mining District contained deposits of a specific age and type (for example, Laramide copper veins and/or copper porphyry systems), its name was adopted for the Mineralized Area that contains these deposits. However, if an existing Mining District contained deposits of differing ages and types, the district was subdivided geologically, with different names applied to each mineral system present. In such cases, the conventional Mining District name for the geographical area was retained for the Mineralized Area containing the mineral system with the largest historical production. For example, all documented mineralization for the Copper Mountain- Morenci District is of early Tertiary age, and is part of a zoned porphyry copper system related to early Tertiary granodiorite porphyry plutons. Consequently, the Mineralized Area containing those deposits is also called Copper Mountain-Morenci, which conforms to' the classical usage of that name. However, the Big Bug District of Yavapai County, which includes both early Tertiary base and precious metal veins, and Precambrian massive sulfide deposits, was subdivided into two Mineralized Areas. The name Big Bug was retained for the area with the largest historical production, which is the area of Precambrian massive sulfide deposits, and the name Ticonderoga was coined for the area of early Tertiary vein deposits which cut the Laramide Big Bug pluton. Commodities and deposit descriptions A summary of types of deposits found in the Basin and Range Province of Arizona is given in Table 1. These deposit types are divided on the basis of age and are listed from youngest to oldest. Major commodities for each district are listed from left to right in the "Commodities" column of Table 2, ranked in approximate order of decreasing economic importance. The word "importance" is used to denote the monetary value of the commodity as determined from cumulative historical production data (Keith and others, unpub. data). Where no such data are available, commodity rankings are more speculative and are given in parentheses in Table 2. Many additional minor commodities may also be present in a Mineralized Area but not listed in Table 2. Deposit descriptions, given in the fifth column of Table 2, emphasize the age and type of mineralization, and may also include information about related igneous rocks or associated structures. Sources of information The map was modified from Keith, Gest, and DeWitt (1983), and Keith and others (1983). Due to their relative abundance and relatively minor importance (in terms of retrievable commodity per unit area), placer deposits were not included on the present map. Much of the information on the present map and on the map of Keith, Gest, and DeWitt (1983), and the reference data in Table 2 was obtained from CRIB (Computer Resources Information Bank of the U.S. Geological Survey) for the state of Arizona. During 1981-1982, the CRIB database for Arizona was revised and updated, and many, but not all, of the Mineralized Area names were substituted for the old Mining District names. Production data for the Mineralized Areas is summarized by Keith and others (1983). The present map, and the map of Keith, Gest, and DeWitt (1983) was prepared jointly by the Arizona Bureau of Geology and Mineral Technology and the U.S. Geological Survey. Acknowledgements We gratefully acknowledge Viki Lawrence of the U.S. Geological Survey, for her work on the preparation of the map. We also acknowledge Tony Antelak of the U.S. Geological Survey, and Susan Calder, Peter Laraba, and Frances Roth of the Arizona Bureau of Geology and Mineral Technology for their contributions. Table 1. Summary of deposit types of the Basin and Range Province in Arizona Era Deposit type Uranium deposits in late Tertiary diatremes. Strata-bound uranium deposits in late Tertiary basin fill Uranium deposits in middle Tertiary diatremes. Strata-bound copper deposits in middle Tertiary clastic rocks. Strata-bound uranium deposits in middle Tertiary sedimentary rocks Strata-bound manganese deposits in middle Tertiary clastic rocks. Cenozoic Middle Tertiary copper-gold deposits in low-angle faults. Middle Tertiary gold-copper-lead veins. Middle Tertiary fluorine ± manganese ± barium veins. Middle Tertiary manganese ± lead ± silver veins and replacement deposits. Middle Tertiary lead-zinc-silver veins and replacement deposits. Early Tertiary lead-silver veins, with or without copper. Early Tertiary tungsten-bearing quartz veins. Cenozoic-Mesozoic Latest Cretaceous-early Tertiary porphyry copper, copper-molybdenum and molybdenum-copper deposits. Table 1. Continued Era Deposit type Late Cretaceous lead-zinc-silver veins and replacements. Late Cretaceous gold-copper-lead veins. Strata-bound uranium deposits in the Cretaceous Toreva Formation, Mesozoic Strata-bound uranium deposits in the Upper Jurassic Morrison Formation. Jurassic gold-quartz veins, with or without mercury. Jurassic porphyry copper or molybdenum deposits. Jurassic, strata-bound uranium deposits in breccia pipes. Strata-bound manganese deposits in Permian sedimentary rocks. Strata-bound uranium-copper deposits in Permian sedimentary rocks Strata-bound uranium deposits in Proterozoic rocks. Proterozoic Proterozoic tungsten/beryllium-bearing pegmatites. Proterozoic gold-copper-lead veins. Mercury deposits of uncertain age in Proterozoic rocks. Proterozoic stratiform massive sulfide deposits. References cited Keith, Stanley B., Gest, D. E., and DeWitt, Ed, 1983, Metallic mineral districts of Arizona: Arizona Bureau of Geology and Mineral Technology map, scale 1:1,000,000, 1 sheet. Keith, Stanley B., Gest, D. E., DeWitt, Ed, Woode-Toll, Netta, and Everson, B, A., 1983, Metallic mineral districts and production in Arizona: Arizona Bureau of Geology and Mineral Technology Bulletin 198. Table 2.--Mineraltzed Areas of the Basin and Range province of Arizona (by county) Csa, see also Indicated Mineralized Area (In this table) for additional Information; MO. Mining District, a Mining District name which was used for the area
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