Item talk:Q55003

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     "name": "Map showing mineral resource assessment for vein and replacement deposits of gold, silver, copper, lead, zinc, manganese, and tungsten in the Butte 1\u00b0 x 2\u00b0 quadrangle, Montana",
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         "value": "i2050D",
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         "value": 64530
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         "value": "10.3133/i2050D",
         "url": "https://doi.org/10.3133/i2050D"
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     "datePublished": "1992",
     "dateModified": "2021-10-13",
     "abstract": "The purpose of this report is to assess the potential for undiscovered vein and replacement deposits of gold, silver, copper, lead, zinc, manganese, and tungsten in the Butte 1\u00b0 x 2\u00b0 quadrangle. This quadrangle, in west-central Montana, is one of the most mineralized and productive regions in the United States. Its mining districts, including the world famous Butte or Summit Valley district, have produced a variety of metallic and nonmetallic mineral commodities valued at more than $6.4 billion. Because of its importance as a mineral producing region, the Butte quadrangle was selected for study by the U.S. Geological Survey under the Conterminous United States Mineral Assessment Program (CUSMAP). Under this program, new data on geology, geochemistry, geophysics, geochronology, mineral resources, and remote sensing were collected and synthesized. The field and laboratory studies were also supported by funding from the Geologic Framework and Synthesis Program and the Wilderness Program. The methods used in resource assessment include a compilation of all data into data sets, the development of a descriptive model for vein and replacement deposits in the quadrangle, and the analysis of data using techniques provided by the Geographic Information System (GIS). This map is one of a number of reports and maps on the Butte 1 \u00b0X2\u00b0 quadrangle. Other publications resulting from this study include U.S. Geological Survey Miscellaneous Investigations Series Maps 1-2050-A (Rowan and Segal, in press) and I-2050-B (Purdy and Rowan, in press); Miscellaneous Field Studies Map MF-1925 (Wallace, 1987); and Open-File Reports 86-292 (Wallace and others, 1986) and 86--0632 (Elliott and others, 1986). Reports on mineral resource assessment for several other types of deposits in the Butte quadrangle are in preparation.",
     "description": "Report: iv, 31 p.; 2 Plates: 31.00 x 50.00 inches and 48.50 x 35.00 inches",
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       "name": "U.S. Geological Survey"
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         "familyName": "Lee"
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         "name": "Rowan, L. C.",
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         "name": "Antweiler, J.C.",
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         "name": "Earth Resources Observation and Science (EROS) Center",
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