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Hilltop Mine (Hand Mine; Kasper tunnel; Gray Mine; Dunn shaft; Blacksmith shaft; Rhem adit), Rustler Park, California District, Chiricahua Mts, Cochise Co., Arizona, USA
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Latitude: 31°59'7"N
Longitude: 109°17'25"W
 
 
A former small surface and underground Pb-Zn-Ag-Cu-Au-Mo-W-As-Cd mine located in secs. 33 & 34, T16S,R30E and secs. 3,4,5, T17S,R30E (Rustler Park 7.5 minute topo map), 6 miles NW of Paradise, about 26 miles S of San Simon, and near Gleeson and near Hand's Pass. Discovered 1880. First produced 1881. The Hidden Treasure claim was first located in the district - now part of the Hilltop Mine. Owned at times by the Hilltop Silver Lead Mines Co.; Hilltop Metals Mining Co.; Piedmont Mines, Inc.; American Zinc, Lead, and Smelting Co.; and operated by the Queen Mining Co. (1973).

Mineralization is in fissure veins and in irregular replacement lenses and bodies in banded and tilted, silicified Mississippian to Permian limestones and older quartzites. Ores are base metal sulfides and carbonates with wulfenite, often argentiferous, and scheelite. The ore zone is 33.53 meters long and 15.24 meters wide. This mine is famous for the fine and abundant wulfenites it produced. Ore control was in part due to brecciation along faults and fissures in the quartzite and limestone. Locally pipes of massive sulfides (1-6 feet diameter) follow fractures into limestone for distances of up to 50 feet.

Local structures include NE-SW faults.

Workings are extensive, including several tunnels, open cuts, and short adits. They total some 6,096 meters in length and 457.2 meters deep. The Kasper Tunnel is 3,000 feet long with 6,000 feet of workings; the Gray Tunnel is 2,000 feet long with 3,000 feet of workings; the Rhem tunnel is 3,700 feet long with 3,000 feet of workings. A total of some 30,000 tons of base metal sulfide ore was produced intermittently from the early 1910's to about 1954. Best production years were 1924 - 1927.

Shipments were made by burro & wagon in the 1880'S. Several carloads of ore were shipped to El Paso in 1902-1906. About 30,000 tons of base metal sulfide ore produced from the early 1910'S to about 1954.

Mineral List

Actinolite
Alabandite
Anglesite
Arsenopyrite
Azurite
Calcite
Caledonite
Cerussite
Chalcopyrite
'Chlorite Group'
Chrysocolla
Chrysotile
Clinozoisite
Copper
Dolomite
Epidote
Fluorite
Galena
Grossular
Gypsum
Hematite
Hemimorphite
Hydrozincite
Jarosite
'Limonite'
Magnetite
Malachite
Mimetite
'Psilomelane'
Pyrite
Pyrochlore Group
Pyrolusite
Quartz
Scheelite
Serpierite
Smithsonite
Sphalerite
Tremolite
Willemite
Wollastonite
Wulfenite


41 entries listed. 38 valid minerals.

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References

Badger, S.S. (1911) The Chiricahua Mountains: Engineering and Mining Journal: 91: 663.

Pough, F.N. (1941), Occurrence of Willemite, American Mineralogist: 26: 92-102.

Rocks & Minerals (1941): 16: 133.

Papke, K.G. (1952) Geology and ore deposits of the eastern portion of the Hilltop mine area, Cochise County, Arizona: Tucson, University of Arizona, M.S. thesis, 99 p.

Wells, R.L., and Puttuck, H.E. (1953) [Hill Top mine, California (Chiricahua) district]: U.S. Atomic Energy Commission Preliminary Reconnaissance Report, File A-P-45, 1 p. [also available in U.S. Atomic Energy Commission Report RME-154, p. 71].

Brittain, R.L. (1954) Geology and ore deposits of the western portion of the Hilltop mine area, Cochise County, Arizona: Tucson, University of Arizona, M.S. thesis, 97 p.

Galbraith, F.W. & D.J. Brennan (1959), Minerals of Arizona: 50, 80, 95.

Keith, Stanton B. (1973), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 187, Index of Mining Properties in Cochise County, Arizona: 52 (Table 4).

Miller, D.K. and Wilson, W.E. (1983), Famous Mineral Localities: The Hilltop Mine, Mineralogical Record: 14: 121-126.

Rocks & Minerals (1988): 63: 329.

Rocks & Minerals (1989): 64: 58.

Rocks & Minerals (1990): 65.

Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Report 92-10: 5 (Table 1).

Brown, S.D. (1993) U.S. Bureau of Mines Open-File Report, Mineral Land Assessment (MLA) 12-93.

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 104, 112, 157, 420, 425.

Arizona Bureau of Mines Bull. 140.

Arizona Bureau of Mines file data.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10102442, MRDS ID M002167

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0040030156.

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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