Latitude & Longitude (WGS84):
35° 22' 27'' North , 114° 8' 39'' West
Latitude & Longitude (decimal):
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Long-form identifier:
mindat:1:2:36810:1
Other/historical names associated with this locality:
Hardy tunnel; Fairchild [?]
A former Ag-Au-Mo-Cu occurrence/mine located in sec. 18, T23N, R17W, and in the NE¼NE¼NE¼ sec. 24, T23N, R18W, G&SRM, 4½ miles SE of Chloride, on Bureau of Land Management administered land. Owned by Duval-Pennzoil United Incorporated, Texas (1978). The USGS MRDS database stated accuracy for this locality is 100 meters.
The Fairfield mine is about half a mile northeast of Mineral Park, on open, sloping hilly ground. It is reported to be developed principally by an 80-foot shaft and a tunnel nearly 1,700 feet long, known as the Hardy tunnel. The ore is reported to be principally of low grade.
Mineralization is a vein deposit hosted in Ithaca Peak granite. The ore body strikes N65E and dips 90. The mineralization is associated with a Late Cretaceous porphyry intrusion. The vein is 5 feet (1.6 meters) wide. Precambrian schistosity strikes N30ºE. Veins, fissures and dikes strike NW to NNW regionally. Associated rocks include the Neoproterozoic Ithaca Peak granite. Local rocks include Early Tertiary to Late Cretaceous granitic rocks.
Workings include underground openings with a length of 51.82 meters and an overall depth of 24.38 meters. In 1881 they included a 185 foot deep shaft and more than 1,000 feet of tunnels.
Commodity List
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References
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To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844.
doi:10.2138/am-2024-9486.
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