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London-Arizona Mine (London-Arizona Consolidated; London-Range; London-Shamrock; Curtin shaft; Brick gp/claims; Ball Copper Co. Mine), Toronado Peak, Chilito, Hayden area, Banner District, Dripping Spring Mts, Gila Co., Arizona, USA

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Latitude & Longitude (WGS84): 33° 3' 34'' North , 110° 47' 38'' West
Latitude & Longitude (decimal): 33.05944,-110.79389
Other regions containing this locality:Sonoran Desert, North America

A former underground Pb-Cu-Ag-Zn-Au-Mo-Bi-perlite mine and group of 132 unpatented claims located in the NW¼ sec. 26, and the NE¼ sec. 27, T4S, R15E, about 1½ miles east of the 79 Mine, 3-4 miles NW of Hayden, on the NW side of Toronado Peak, ½ mile S of Chilito, on federal land. Discovered by Mr. Watson in 1880. Closed 1950. Claims extend into sec. 27. In 1913 the London-Arizona Consolidated Copper Co. merged London-Range, London-Arizona, and the O'Carroll & Ball shafts, and the Curtin (Humphrey) shaft, but some were later split. Other operators included the Toronado Gold Mining Co.; David Hartley; and J.W. Wright. Additional names that apply to this property: O'Carroll claims; Humphrey property; Reagen property; D.H. claims.

Mineralization is an irregular ore body hosted in Percha Shale and the Martin Formation. Ore control was the Chocolate fault and the base of the Martin Formation. Ore concentration was the oxidation process. An associated rock unit is rhyodacite.

The London-Arizona ore deposit probably represents the outer peripheral zone of a major ore body with the portions towards the main intrusive contact being eroded away.

Workings include a 180 foot deep shaft on London-Range; the 325 foot deep Curtin shaft; and some shallow shafts. Over 1500 feet of drifts, tunnels, and crosscuts. Production was some $1,050,000 between 1912 & 1928 (period values).

Mineral List

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

24 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Serpukhovian - Early Cambrian
323.2 - 541 Ma
Mississippian, Devonian, and Cambrian sedimentary rocks

Age: Paleozoic (323.2 - 541 Ma)

Stratigraphic Name: Tapeats Sandstone; Bright Angel Shale; Muav Limestone; Temple Butte Formation; Redwall Limestone; Bolsa Quartzite; Abrigo Formation; Martin Formation; Escabrosa Limestone

Description: Brown to dark gray sandstone grades upward into green and gray shale, overlain by light to medium gray or tan limestone and dolostone. This unit includes the Tapeats Sandstone, Bright Angel Shale, Muav Limestone, Temple Butte Formation and Redwall Limestone in northern Arizona, and the Bolsa Quartzite, Abrigo Formation, Martin Formation, and Escabrosa Limestone in southern Arizona. These rocks record intermittent sea-level rise and inundation in early Paleozoic time. (330-540 Ma)

Lithology: Major:{sandstone,shale,limestone}, Minor:{dolostone,quartzite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

Localities in this Region

  • Arizona
    • Gila Co.
      • Dripping Spring Mts
        • Banner District
          • Hayden area
            • Chilito
              • Toronado Peak
                • London-Arizona Mine (London-Arizona Consolidated; London-Range; London-Shamrock; Curtin shaft; Brick gp/claims; Ball Copper Co. Mine)

This page 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.


Ross, Clyde P. (1925) Ore Deposits of the Saddle Mountain and Banner Mining Districts, Arizona, USGS Bull. 771: 61, 65.

Weed, W.H. (1925), The Mines Handbook: Vol. XIII: 389.

Flagg, A.G. (1942), Vanadium report, Book I to Book VIII, Arizona Department of Mines Mineral Resources (unpublished): books 2 & 8.

Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, Arizona Bureau of Mines Bull. 158: 81-82.

U.S. Atomic Energy Commission Report 172-480 (1953), Gila County Preliminary Reconnaissance Report: 23.

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

Eastlick, John T. (1968), in: Ore Deposits of the United States, 1933-1967. Graton Sales Volume, John D. Ridge editor, A.I.M.E.: 1191-1210.

Koschmann, A.H. and Bergendahl, M.H. (1968) Principal Gold Producing Districts of the United States. USGS PP 610: 38.

Banks and Krieger (1977) USGS Map GQ-1391.

Elevatorski, E.A. (1978), Arizona Industrial Minerals, Arizona Department of Mineral Resources, Minerals Report No. 2: 31.

Hicks, C.J. (1979), Molybdenum occurrences in Arizona, Arizona Department of Mineral Resources Mineral Report #3: 16.

Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp.

Peirce, H. Wesley (1990), Arizona Geological Survey Industrial Minerals card file.

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 157, 368.

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

Arizona Department of Mineral Resources Arizona-London group file.

Arizona Department of Mineral Resources London-Gila group file.

Arizona Department of Mineral Resources Kullman-McCool group file.

MRDS database Dep. ID #10102439, MRDS ID #M002098; and
Dep. ID #10060354, MRDS ID #TC10731; and Dep. ID #10112942, MAS ID #0040070465.

Mineral and/or Locality  
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