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Evening Star Mine (Evening Star claims), Whetstone District, Whetstone Mts, Cochise Co., Arizona, USA

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Latitude & Longitude (WGS84): 31° 49' 59'' North , 110° 24' 5'' West
Latitude & Longitude (decimal): 31.8330555556, -110.401388889
Other regions containing this locality:Sonoran Desert, North America


A former small surface and underground W mine located on 5 unpatented claims, West of the Chadwick's claims, in the SW ¼ sec. 27, T.18S., R.19E. First produced 1917. Owned by J. Christie (1937- ).

Mineralization is sparse, scattered wolframite, iron oxide, and pyrite in coarsely crystalline quartz veins and stringers cutting pegmatite dikes in Precambrian Pinal Schist on the northern flank of an Eastward-draining canyon. The schist strikes N10ºW and dips 80ºSE and is intruded on the SE by granite. Several pegmatite dikes trend N20º to 30ºNE through the granite & schist and are up to 15 or more feet wide. Quartz stringers in the pegmatite & other quartz stringers of N10ºE & N45ºW strike carry a little wolframite. Some of these stringers intersect the main vein which strikes N50ºE and dips 30ºNW and ranges from 5 inches (13 cm) to about 2 feet (0.6 meters) thick. The vein consists of coarsely crystalline, grayish-white quartz with mineralization. The wall rocks of the vein and of the quartz stringers have been strongly sericitized.

Local structures include schist that strikes N10W and dips 80SE, and is intruded by granite on the SE.

Workings include a 32 foot deep incline and several shallow surface openings. A few tons of tungsten ore were produced since 1937.

Mineral List


2 valid minerals.

The above list 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.

References

Wilson, E.D. (1941), Tungsten Deposits of Arizona, Geological Series No. 14, Arizona Bureau of Mines Bulletin 148: 46.

Dale, V.B., Stewart, L.A., and McKinney, W.A. (1960), Tungsten deposits of Cochise, Pima, and Santa Cruz Counties., Arizona, U.S. Bureau of Mines Report of Investigation 5650: 56-57.

Keith, Stanton B. (1973), Arizona Bureau of Mines Bull. 187, Index of Mining Properties in Cochise County, Arizona: 91 (Table 4).

Chatman, M.L. (1994) U.S. Bureau of Mines Open File Report Mineral Land Assessment (MLA) 2-94: 17-18.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10102427, MRDS ID #M001779 and ID #10210062

U.S. Bureau of Mines, Minerals Availability System (MAS) file #0040030272.

Mineral and/or Locality  
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