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Nelly James Mine (Miller Canyon deposit; Miller Canyon prospect; Nellie James prospect; Holenstein Mine), Miller Canyon, Miller Peak, Hartford District (Huachuca Mountains District), Huachuca Mts, Cochise Co., Arizona, USA

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Latitude & Longitude (WGS84): 31° 24' 9'' North , 110° 17' 26'' West
Latitude & Longitude (decimal): 31.40250,-110.29056
Other regions containing this locality:Sonoran Desert, North America

‡Ref.: Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, Arizona Bureau of Mines Bull. 158: 37.

Hayes, P.T., and Raup, R.B. (1968) Geologic map of the Huachuca and Mustang Mountains, southeastern Arizona: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-509, 1 sheet, scale 1:48,000.

Creasy, C.S. (1973) Field examination.

Tuftin, S.E. and Armstrong, R.C. (1994) U.S. Bureau of Mines Open File Report Mineral Land Assessment (MLA) 1-94.

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

Arizona Bureau of Mines file data, circa 1973.

Mr. Roy Parsons, Huachuca City, Arizona.

MRDS database Dep. ID file #10039646, MRDS ID #M050568; and, Dep. ID #10048120, MRDS ID #M800144; and, Dep. ID #10185917, MAS ID #0040030299.

A former small surface Pb-Cu-Zn-Au-Ag mine located on the 7250 contour of Miller Canyon in sec. 27, T23S, R20E. Started in the early 1880's. Produced 1914-1915. A little ore was sent from this, and other, properties to lead smelters at Charleston and Benson. Field observations indicate that this was strictly a prospect. The existence of a road the length of Miller Canyon to the mine and the presence of a large ore bin at the top of the mountain are inconsistent infrastructure for the size of the workings and this condition is indicative of a possible mining stock scheme.

Mineralization is a vein deposit, 0.61 meters wide, striking N5W and dipping 65NE. Alteration is skarn.

Local structures include exotic blocks of Paleozoic sedimentary rocks within Jurassic volcanic rocks. A NW-trending thrust is mapped approximately 100 yards (96 meters) west of the workings.

These workings are located near the top of Miller Canyon and were re-discovered accidentally by Mr. Parsons & a friend. The name of Miller Canyon is commonly recognized but it is a collectors' name and a misnomer since the actual mine is at the head of the canyon at Miller Peak. One must hike through Miller Canyon to get to the locality. It was originally the Holenstein mine (1880's). Reaching this locality is a chore since it requires an approximate 3 mile (5 km) hike, gaining approximately 1,500 feet (450 meters) of altitude, through a wilderness area (no motorized transport allowed). The locality is often snow-covered. Collecting is hard work and anything collected must be carried out.

Mineral List

8 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

Oxfordian - Hettangian
157.3 - 201.3 Ma
Jurassic volcanic rocks

Age: Jurassic (157.3 - 201.3 Ma)

Stratigraphic Name: Ali Molina Formation; Topawa Group; Mount Wrightson Formation; Canelo Hills Volcanics; Cobre Ridge Tuff; Black Rock volcanics; Planet Volcanics

Description: Massive quartz-feldspar porphyry, generally interpreted as thick, welded rhyolitic tuffs, with locally abundant lava, and sandstone and conglomerate derived from volcanic rocks. Rare eolian quartzite units are interbedded in southern Arizona. Includes Ali Molina Formation, Mount Wrightson Formation, part of the Canelo Hills Volcanics, Cobre Ridge tuff, Black Rock volcanics, Planet Volcanics, and equivalent rocks. (160-200 Ma)

Comments: The Jurassic quartz porphyry, Ali Molina, Mt Wrightson, Cobre Ridge, Black Rock volcanics, Planet Volcanics.

Lithology: Major:{rhyolite,sandstone,conglomerate}, Minor:{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, used under Creative Commons Attribution 4.0 License

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