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Lakeman group, Gold Gulch, Copper Mountain District (Clifton-Morenci District), Shannon Mts, Greenlee Co., Arizona, USA

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A former surface and underground Ag-Cu-Au-Pb mine located on 8 patented claims totalling about 138 acres, in the center S½ sec. 19, T4S, R29E, 3.0 miles SW of Morenci in Gold Gulch, on private land. Discovered in 1875 by R.L. Lakeman. Produced 1904-1935. The Lakeman group consists of 8 claims: Stevens, Campbell, Tonto, Tiger, Globe, Pinetree, Minnie L., and the Katie L. The above location coordinates describe the shaft in the south half of sec. 19. Other claims located on ridge south of Gold Gulch. Operators included E. Bignell; Knapp and Lakeman; R.L. Lakeman; H.L.M. Wright and N.J. Wilson; Messabi-Morenci Mining Co. Owners included Mrs. Grace Morrison.

Mineralization is an irregular ore body with a vein that averages 3 feet (3.05 meters) wide, with a depth to bottom of 60.96 meters, and striking N60E and dipping vertically. An associated rock unit is the Morenci Granite Porphyry. Ore control was NE-trending fissure vein in a diorite porphyry mass. Ore concentration is mineralization along veins, evidenced by quartz cementation and pyritic dissemination. Alteration is sericization of diorite porphyry wall rock. The porphyry is greatly disintegrated. Gold and silver values are carried in the sulfides.

The porphyry crumbles easily to fragments and forms a sandy soil in the region of Gold Gulch. Diorite porphyry forms the southern end of the great stock of Morenci and Metcalf. Placer gold in Gold Gulch was derived from oxidized gold-bearing veins associated with the intrusive porphyry rather than regional faulting.

Area structures include porphyry that consists largely of sills and laccoliths dipping 10°-30° SW like the sedimentary strata. Porphyry appears regonally as stocks, sheets and dikes tightly interbedded wit sedimentary rocks. Tectonic component is the Gold Gulch Fault Block.

Workings included one main shaft 300 feet (91.44 meters) deep, 2 short tunnels with lengths of 30 feet and 40 feet, about 470 feet of drifts, an additional shaft, one stope, various shallow cuts and pits, and placer gold workings. This property produced notable amounts of gold ore between 1885 and 1895.

Mineral List



8 entries listed. 4 valid minerals.

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: 292-296.

Johnson, M.G. (1972), Placer gold deposits of Arizona, USGS Bull. 1355: 15-16.

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.

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

U.S. Bureau of Land Management Mining District Sheet #841.

MRDS database Dep. ID #10048283, MRDS ID #M800408.

 
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