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Stevens Mines Group (Stevens group of claims), Garfield Gulch, Copper Mountain District (Clifton-Morenci District), Shannon Mts, Greenlee Co., Arizona, USA

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A former surface and underground Cu-Ag-Au mine located in the W½ sec. 33, and in the E½SE¼ sec. 32, T3S, R29E; and in the N½NW¼ sec. 4, T4S, R29E, 1.0 mile N of Metcalf on the W side of highway 191 (old highway 666), on private land. The easternmost adit is located in the SW quarter of sec. 33. The property is comprised of 12 unpatented claims (X.I.V. group No. 1 through 12). Discovered in 1872 by Charles E. Stevens and Isaac Stevens and the Leszynsky brothers. Produced 1903-1920 & 1937-1951. Operated by Mr. Charles E. Stevens Jr. (1951). Owned by the Phelps Dodge Corp., Morenci Branch. Mr. Charles E. Stevens Jr. received lease on the Molinar Alaska Mine in 1952 from Phelps Dodge Corp. in return for giving the XIV group property to the corporation.

Mineralization is an irregular orebody with narrow stringers, hosted in schist. It has maximum width of 100 feet (0.48 meters) and contains 2 veins with dimensions 30 feet by 400 feet. Several smaller veins with dimensions of 4 by 24 inches. Associated rock units are the Pinal Schist, Modoc Limestone, the Precambrian granite basement and the Morenci Granite Porphyry. Ore control was small NE-trending fissure veins in quartz monzonite porphyry. Ore appears to follow the dip of planes of stratification in the limestones. Ore is also deposited where diabase sills come in contact with granite or granite porphyry. Concentration was mineralization along small veins and as irregular oxide and carbonate bodies in monzonite porphyry and along contacts of limestones and sills. Alteration was minor.

Area structures include normal faulting confined to Pre-Tertiary rocks. NNE-striking fault with 45° SE dip, separates sedimentary rocks from Precambrian granite associated porphyry dike is 200 feet thick. Fissure veins in limestone and basal granite sequences and irregular bodies on or near contacts of intrusive masses.

Tectonic component is the Metcalf Fault Block region and the Coronado Massif surrounded by peripheral faults. The fault block to the east of the massif is downthrown about 2000 feet, placing Carboniferous limestones at the level of Chase Creek.

Workings are 91.44 meters long and 18.29 meters deep. Developments included one shaft of 60 foot of depth, 2 tunnels of 300 feet total length.

Mineral List

Mineral list contains entries from the region specified including sub-localities


19 entries listed. 9 valid minerals.

Localities in this Region

USA

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Lindgren W. (1905) The Copper Deposits of the Clifton-Morenci District, Arizona. USGS Professional Paper 43: 351-352.

Dana, E.S. and W.E. Ford (1909) System of Mineralogy, 6th. Edition, New York. Appendix 2: 35.

Stevens, P. (1909) The Copper Handbook, Vol. IX: 1273, Stevens Copper Co.

Weed, W.H. (1920) The Mines Handbook, Vol. XIV: 236, Stevens Copper Mining Co.

Langton, J.M. (1973), Ore Genesis in the Morenci-Metcalf District, A.I.M.E. Transactions: 254: 247-257.

Bennett (1975) Geology and Origin of the Breccias in the Morenci-Metcalf District, Greenlee County, Arizona, MS thesis, University of Arizona, 153 pp.

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 228.

U.S. Bureau of Mines - Arizona Bureau of Geology and Mining Technology file data.

U.S. Bureau of Mines files, Stevens group.

Arizona Department of Mineral Resources file data - Stevens Mine.

U.S. Bureau of Land Management Mining District Sheet #837.

MRDS database Dep. ID #10048272, MRDS ID #M800395; and Dep. ID #10048274, MRDS ID #M800397.

 
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