Gold from selected localities.
USA | |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. | |
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. | |
[var: Electrum] Chris Gammons and Ryan Stevenson (2015) Silver Mineralogy of the Butte Mines. 2015 Mining and Mineral Symposium, Montana Bureau of Mines and Geology p50; Gammons, C. H., Szarkowski, J., & Stevenson, R. (2016) New investigations of the mineralogy of silver in the world-class porphyry-lode deposits of Butte, MT. Mining engineering Magazine website Tiffany Ostenburg (2022) Mineralogy and Fluid Inclusion Study of the Marget Ann Mine of the Butte Mining District, Silver Bow County, Montana. Masters thesis, Montana Tech. 94pp | |
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |