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Gold Bar Mines (Stevens Brothers Gold Holding; Southeast Sycamore group; Mrs Frank Bates group), Sycamore Gulch, Greenlee Co., Arizona, USA

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A former surface and underground Ag-Au-Cu mine. Discovered by the Stevens Brothers in 1875. Produced 1910-1946.

Mineralization is an irregular ore body. Associated rock units are the Morenci Granite Porphyry and Precambrian granite basement. Ore control is a NE-trending fissure vein forming prominent ridge and extensive surface outcrops. Ore concentration is mineralization along fissure vein forming irregular ore bodies and banded deposits. Alteration is minor. Some surface oxidation whereby granite host rock is altered by limonite.

Area structures include NE-trending quartzitic fissure veins connected with porphyry dikes; block faulting NE of Copper King Mountain. Vein in quartzitic dike associated with nearby Morenci Granite Porphyry stock.

Tectonic component is the transition zone between the Basin and Range and Colorado Plateau Provinces.

Mineral List

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


5 entries listed. 4 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: 363.

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

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

Arizona Department of Mineral Resources file data, South Sycamore group.

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 372.

 
Mineral and/or Locality  
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