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  "Title": "Niobium Deposits in the United States",
  "Author": "Karl, N.A., Knudsen, L.D., and Mauk, J.L.",
  "Comments": "This dataset was developed as part of an ongoing effort by the U.S. Geological Survey to inventory public information on critical mineral deposits within the United States that have public record of production and (or) resources above a specified cutoff limit. In the case of niobium (Nb), sites must have a contained resource and (or) past production of Nb metal greater than 10,000 metric tons, which is the total reported U.S. consumption of Nb in 2019. \n\nThe geospatial data provide location, geologic description, and production and resource information. In general, the USGS uses this information to delineate mineral resource permissive tracts (geographic areas in which specific types of mineral deposits may occur), develop assessments of potential undiscovered mineral resources, determine where and how environmental effects of mining may be observed, and understand the natural variability found in mineral deposits of particular types. The data also support the Federal strategic objective to secure reliable supplies of critical minerals by providing information for geoscience research and mineral exploration to State and Federal agencies, private industry, and the general public.",
  "Subject": "This U.S. Geological Survey (USGS) data release provides the descriptions of 11 U.S. sites that contain enrichments of niobium.",
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