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• Organization: Department of the Interior
• Updated: 20200929 | Harvested: July 18, 2025 at 05:20 AM

Twenty-five ore and gangue mineral separates from the Miocene-age Goldfield and Tonopah epithermal Au-Ag deposits in southwestern Nevada were analyzed to determine the helium, neon, and argon (He,...

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• Organization: Department of the Interior
• Updated: 20200827 | Harvested: July 17, 2025 at 08:17 PM

From June to September 2017, the United States Geological Survey (USGS) collected a total of 116 surficial sediment and bedrock samples from abandoned mine wastepiles, ephemeral channels below...

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• Organization: Department of the Interior
• Updated: 20220912 | Harvested: July 16, 2025 at 10:11 AM

This U.S. Geological Survey (USGS) data release provides the descriptions of the only U.S. sites-including mining districts, mineral occurrences, and mine features-that have reported production...

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