Danville-Hanchetta claims (Danville and Hanchette Fraction claims; Fraction Mine; Crown King claim; Boreas claim; No. 4 claim; Summit claim), Bisbee, Warren District, Mule Mts, Cochise Co., Arizona, USA
Latitude: 31°24'50"N
Longitude: 109°54'15"W
‡Ref.: Jones, E.L., Jr. & F.L. Ransome (1920), Deposits of manganese ore in Arizona, USGS Bull. 710-D: 109-112, Plate IV.
Wilson, E.D. & G.M. Butler (1930), Manganese ore deposits in Arizona, Arizona Bureau of Mines Bull. 127: 41-42.
Farnham, L.L., Stewart, L.A., and Delong, C.W. (1961), Manganese Deposits of Eastern Arizona, US Bureau of Mines Information Circular 7990: 18.
Keith, Stanton B. (1973), Arizona Bureau of Mines Bull. 187, Index of Mining Properties in Cochise County, Arizona: 86 (Table 4).
Farnham, L.L., U.S. Bureau of Mines Report file No. 467, Manganese, Summary Reports, Arizona, Summary Report No. 187.
MRDS database Dep. ID file #10109007, MRDS ID #M002130; and, Dep. ID #10258220, MAS ID #0040030273; and, Dep. ID #10282946, MRDS ID #M241117, MAS ID #0040030025.
A former medium-output surface Cu-Ag-Au-Mn (V) mine located in the NW ¼ sec. 22, T.23S., R.24E., about 1,000 feet SSW of the Briggs shaft. Discovered 1918. Owned by the Phelps Dodge Corp.
Mineralization is irregular replacement masses along a N10ºW striking fault zone of fissuring in the Pennsylvanian-Permian Naco Limestone. Ore consists of hard manganese oxides with iron oxides, calcite and minor copper staining in scattered orebodies. Ore control was faulting and the associated brecciation. An associated rock unit is the Sacramento Hill Stock. Small amounts of silver on the Danville, Hanchette Fraction, & No. 4 claims.
Local structures include common pre-mineralization faulting and tilting; faults with strikes of N10W to N40E, and S30W to N50W, pre-mineralization.
Workings include open cut and shallow pit openings along a distance of 500 feet. At least 1,400 tons of manganese ore were produced from 1914 to 1920.
Mineral List
5 entries listed. 4 valid minerals.
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