Latitude: 32°34'19"N
Longitude: 110°43'47"W
A former surface and underground W-Ag-V-Mo-Au mine located on 8 unpatented claims in sec. 8, T10S, R16E, about 1½ miles WSW of Campo Bonito and about 4 miles South of Oracle on the NE flank of the Santa Catalina Mountains, on National Forest land. Claims include the Bearcat No. 5, Bearcat No. 6, Silver Cliff, Madre del Oro, and the American Flag. Discovered by E.D. Lovejoy in 1939. The claims were held by E.B. Lovejoy in 1941 Owned by Paul H.M.P. Brinton.
Mineralization is a vein deposit hosted in Quartz Monzonite and diabase. The ore bodies are tabular shoots which strike N10E, dip 45-50E, and are 0.61 meters thick, with a length of 365.76 meters. The Footwall vein is nearly barren of Scheelite in its wider portions. An associated rock unit is diorite.
Diorite porphyry intrudes granite along a fault creating a 50-60 foot wide dike. Granite also is in contact with shale. See the American Flag Mine entry for information on the adjoining Cu-Ag producer, also in the Bearcat group. Tungsten occurs in quartz veins at contacts of dikes with granite. Scheelite, possibly some gold and silver. Regional features include block faulting trending NNW.
Workings in 1941 included a 50 foot long open cut X 15 foot deep & a 20 foot inclined shaft; 4 adits: 90 & 40 feet long, on the Bearcat No. 6, 150 foot on the Silver Cliff, 75 feet on the Madre Del Oro. One 80 foot shaft on the Madre Del Oro. One 10 foot winze on the Bearcat No. 6. Numerous small pits. A 150 lb/hr gravity mill was working in 1941.
Production was small amounts of tungsten produced during WWI; 600 pounds of concentrates were produced to February, 1942.
References
Wilson, E.D. (1941), Arizona Bureau of Mines Bull. 148: 34.
Dale, V.B. (1959) Tungsten Deposits of Yuma, Maricopa, Pinal, and Graham Counties, Arizona. U.S. Bureau of Mines Report of Investigation 5516: 49-52.
Lemmon, D.M., and Tweto, O.L. (1962) Tungsten in the U.S., USGS map, MR-25.
USGS Campo Bonito Quadrangle map.
US Bureau of Mines cared file.
Arizona Department of Mineral Resources American Flag mine file.
MRDS database Dep. ID #10088609, MRDS ID #M050214.
Mineral List
1 entry listed. 1 valid mineral.
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