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United Verde Extension Mine (Little Daisy group of claims; Little Daisy shaft; The UVX; The U.V.X. property; Edith and Audrey shafts), Jerome, Verde District, Black Hills (Black Hill Range), Yavapai Co., Arizona, USA

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Latitude & Longitude (WGS84): 34° 45' 12'' North , 112° 6' 43'' West
Latitude & Longitude (decimal): 34.753334045410156, -112.11194610595703
 
‡Ref.: Weed, W.H. (1918) The Mines Handbook, Vol. XIII: 415-417.

Yavapai Magazine (1918) February, 1918: 4-6.

Lindgren, W. (1926), Ore deposits of the Jerome and Bradshaw Mountains quadrangles, Arizona, USGS Bull. 782: 27, 30, 79-88.

Butler, B.S. & Wilson E.D. (1938), Some Arizona Ore Deposits, Clifton-Morenci District, Arizona Bureau of Mines Bull. 145: 50.

Schwartz, G.M. (1938), Oxidized copper ores of the United Verde Extension Mine, Economic Geology: 33: 21-33.

Galbraith, F.W. (1947), Minerals of Arizona, Arizona Bureau of Mines Bull. 153: 9, 16, 31.

Anderson, C.A. & S.C. Creasy (1958), Geology and ore deposits of the Jerome area, Yavapai Co., AZ, USGS PP 308: 91, 94, 135-149.

Niemuth, N.J. (1987), Arizona Mineral Development 1984-1986, Arizona Department of Mines & Mineral Resources Directory 29, 46 pp.

Blair, Gerry (1992), The Rockhound's Guide to Arizona: Helena, MT, Falcon Press.

Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Rept. 92-10: 18 (Table 1).

Sawyer, M.B., Gurmendi, A.C., Daley, M.R., and Howell, S.B. (1992) Principal Deposits of Strategic and Critical Minerals in Arizona, U.S. Bureau of Mines Special Publication, 334 pp.

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 118, 121, 126, 186, 191, 197.

USGS Clarkdale Quadrangle map.

MRDS database Dep. ID #10102464, MRDS ID #M002668; and, Dep. ID #10137527, MAS ID #0040250684; and, Dep. ID #10137564, MAS ID #0040250018; and, Dep. ID #10137720, MAS ID #0040251294.

A former underground Cu-Ag-Au-Zn mine located in the NW¼ sec. 23, T.16N., R.2E. (Clarkdale 7.5 minute topo map). Discovered by J.J. Fisher in 1900. This property consists of a group of 4 claims and lies to the east of the United Verde Mine. Owned by the United Verde Extension Mining Co., more commonly known simply as "U.V.X." Later owned by the Mingus Mountain Mining Corp. Produced 1900-1974.

Mineralization is a deposit with an elliptical ore body hosted in the Deception Rhyolite, Grapevine Gulch Formation. Partly leached ore occurs on the 800 foot level; a chalcocite body 5 feet wide on the 1,200 level, 500 feet South of the Edith shaft. A main orebody of chalcocite was found on the 1400 level, 900 feet South of the Edith shaft. This body was 269 feet wide and 440 feet long on this level. This orebody is almost entirely in a rock described as "quartz porphyry." Strong kaolinization was found at the edges of the orebody. Diorite is seen only ion a small are aon the 1200 level. The predominant rock is a greenstone schist, very similar to other parts of the district. The schistosity is well defined but the rock is not fissile. The "quartz porphyry" is undoubtedly intruded into the greenstone. Ore control was stratigraphy and igneous activity. Ore concentration was hydrothermal with oxidation at near surface. Alteration was chloritization, sericitization, kalinization, and pyritization.

Area structures include foliation in metavolcanic rocks that trends N10W to N40W. Massive sulphide lenses elongated parallel to bedding occur in the metavolcanic rocks.

Workings include the Edith shaft, the Audrey shaft and the Little Daisy shaft. The Edith and the Audrey collars are both at 4,908 feet of altitude. The Little Daisy shaft was sunk to 800 feet deep to reach the Precambrian rocks. A winze went below the 800 foot level, where partly leached ore was encountered. The Edith shaft was deepened to 1,400 feet. The principal levels of the Edith and Audrey shafts are at depths of 800, 1200, 1300, 1400, 1500, 1600, and 1700 feet below the collar of the Little Daisy shaft. A 12,000 foot long drainage tunnel was driven as well. It drains the mine at the 1300 level, or 1100 feet below the collar. Total length of workings amounts to more than 10 miles. The square-set method of mining was employed in the heavy ground; the Mitchell method elsewhere.

Production included $600,000 of ore from the 1200 level orebody (period values). During 1917 the main orebody produced 6,991,480 pounds of copper, worth $2,167,358 (period values). During 1916 U.V.X. produced 36,402,972 pounds of copper from 77,461 tons of ore averaging 23.5% Cu, besides 2,570 oz. Au and 128,468 oz. Ag. Total tonnage was 3,878,825 dry tons of ore yielding 793,331,100 pounds of Cu, 6,449,156 oz. Ag, and 152,756 oz. Au. The total output being worth $9,949,918 (period values), of which $7,400,000 was profit!

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