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Sheep Tanks District, Little Horn Mts, Yuma Co., Arizona, USA

A Au-Ag-Mn-Fe-Cu-Pb-Ba (Be) mining district located in T1N-T1S, R14-15W, within a mile of the southern margin of the Little Horn Mountains. Started in 1909 and owned by J.G. Wetterhall.

Mineralization is varied: (1) Gold and silver with local, minor, lead and copper mineralization in irregular vein deposits along fault zones cutting Tertiary volcanics; (2) Irregular manganese oxides in stringers, pods, and overlapping lenses along shear zones in Tertiary volcanics; and, (3) Minor gold placers.

Workings are numerous prospects, but few producing mines, worked from about 1909 through 1950, producing some 17,411 tons of precious and base metal ores containing about 20,900 oz. of gold, 39,730 oz. of silver and one ton of copper. Some 250 long tons of low-grade manganese ore and a few ounces of placer gold were also produced.



References:
Cousins, N.B. (1972), Relationship of black calcite to gold and silver mineralization in the Sheep Tanks mining district, Yuma County, Arizona, Arizona State University M.S. thesis.

Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geological Survey Branch Bull. 192, Index of Mining Properties in Yuma County, Arizona: 174 (Table 4).

Wilson, E.D. (1933) Geology and Mineral Deposits of Southern Yuma County, Arizona. Arizona Bureau of Mines Bulletin 134: 132-133.

Wilson, E.D., Cunningham, J.B., and Butler, G.M. (1934), Arizona Lode Gold Mines and Gold Mining (revised 1967), Arizona Bureau of Mines Bull. 137: 143-147.

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 118, 124, 240.

Arizona Bureau of Mines file data.




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


Mineral List:
'Adularia'
Anglesite
Aragonite
Aurorite
Baryte
Calcite
var: Manganoan Calcite
Cerussite
Chalcophanite
'Chlorite Group'
Chrysocolla
Galena
var: Argentiferous Galena

Gold
Groutite
Hematite
Hollandite
Limonite
'Psilomelane'
Pyrolusite
Quartz
Rhodochrosite
'Sericite'


47 entries listed. 15 valid minerals.

Localities in this Region:
USA
 
  • Arizona
    • Yuma Co.
      • Little Horn Mts
        • Sheep Tanks District
          • Kofa Game Range

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Copyright © Jolyon Ralph and Ida Chau 1993-2009. Jobs in Arizona, USA Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 22nd Oct 2009 18:34:12