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Centennial Eureka Mine (Blue Rock), Eureka, Tintic District, East Tintic Mts, Juab Co., Utah, USA

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Latitude & Longitude (WGS84): 39° 56' 36'' North , 112° 7' 19'' West
Latitude & Longitude (decimal): 39.9436111111, -112.122222222


A former Pb-Ag-Zn-Cu-Au mine located in sec. 24, T10S, R3W, SLM, 1.2 km (0.7 miles) N of Eureka and 1,700 feet N45W of Eureka Peak, on private land. Discovered in 1870. Operated during the period 1875 to 1955. Owned by the Sharon Steel Corp., Miami, Florida. Operated by the U.S. Smelting, Refining and Mining Co. MRDS database accuracy for this location is not stated.

Mineralization is a polymetallic deposit hosted in dolomite. The ore bodies are lenticular/pipe-shaped structures with a depth-to-bottom of 548.64 meters and a maximum width of 30.48 meters (125 feet). The California pipe was the best in the mine. It has a strike of N5W, dip of 75 and a depth-to-bottom of 457.2 meters and a width of 38.1 meters. Controls for ore emplacement included 5 fracture zones. Local alteration resulted in calcite, sericite, pyrite and metals in rhyolite. An associated rock is Oligocene-Late Cambrian quartz monzonite. Local rocks include Middle Cambrian shale and carbonate rocks in central Utah.

Bedding rolls toward flat here and in mines to the S at and below the 16-18 levels. Beds strike N5-10W and dip 70-80E. Faults: the Centennial Fault (N45E, 67SE); California Fault (Left-Lateral, NW, 60-75SW, with 200 to 500 feet of horizontal displacement); E-W fractures dipping 68S. Structure description: easterly cross breaks.

Workings include underground openings with an overall depth of 695.25 meters and an overall length of 32,186 meters. The development consists of drifts, raise, and shafts covering a surface area of 400 to 800 feet wide and 2,800 feet long. The deepest shaft is 2,281 feet with 20 levels. A 2,207-foot adit connects with this shaft on the 525 level. The mine is connected with the Opex and Grand Central on the S and the Eureka Hill to the N.

Production information: An average of 100,000 tons of ore per year. $50,000,000 total value of production (period values).

Mineral List

Acanthite

Adamite

var: Cuprian Adamite

Anglesite

Antlerite

Arseniosiderite

Arsenocrandallite

Arsenogoyazite

Aurichalcite

Austinite

var: Cuprian Austinite

Azurite

Bariopharmacosiderite

Baryte

Bayldonite

Beudantite

'Bindheimite'

Brochantite

Bromargyrite

Calcite

Carminite

Cerussite

Cesbronite

Chalcocite

Chalcopyrite

Chenevixite

Chlorargyrite

Chrysocolla

Clinoclase

Colusite

Conichalcite

Connellite

Copper

Cornubite

Cornwallite

Coronadite

Covellite

Cuprite

Devilline

Dolomite

var: Ferroan Dolomite

Duftite

Dugganite

Enargite

Eurekadumpite (TL)

Frankhawthorneite (TL)

Galena

Gartrellite

Gilmarite

Goethite

Gold

Goldfieldite

Hematite

Hemimorphite

Hinsdalite

Hydrozincite

Jalpaite

Jarosite

Jensenite (TL)

Juabite (TL)

Kettnerite

Langite

Leisingite (TL)

Malachite

Marcasite

Mcalpineite

Metazeunerite

Mimetite

'Mimetite-M'

Minrecordite

Mixite

'Mixite Group'

Muscovite

var: Sericite

Natrojarosite

Olivenite

Pearceite

Philipsburgite

Plattnerite

Plumbojarosite

Polybasite

Posnjakite

Preisingerite

Pyrite

Pyrolusite

Quartz

Quetzalcoatlite

Rosasite

Scorodite

Segnitite

Silver

Strashimirite

Svanbergite

Tenorite

Tetrahedrite

Tsumcorite

Tyrolite

Utahite (TL)

Wurtzite

Xocomecatlite

Zeunerite


94 valid minerals. 6 (TL) - type locality of 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

Lindgren, Waldemar, and Loughlin, G.F. (1919), Geology and Ore Deposits of the Tintic Mining District, Utah: USGS Professional Paper 107, 276 pp.

American Mineralogist (1951): 36: 249-255.

Cook, D.R., Editor (1957), Geology of the East Tintic Mountains and Ore Deposits of the Tintic Mining Districts: Utah Geological Society Guidebook No. 12, 183 p.

Morris, H.T. (1964), Geology of the Eureka Quadrangle, Utah and Juab Counties, Utah: USGS Bulletin 1142-K: K1-K29.

Morris, H.T., and Lovering, T.S. (1979), General Geology and Mines of the East Tintic Mining District, Utah and Juab Counties, Utah, USGS Professional Paper 1024, 194 pp.

Rocks & Minerals (1993): 68(6): 406-416.

Roberts, A.C., Grice, J.D., Criddle, A.J., Jensen, M.C. Harris, D.C. & Moffatt, E.A. (1995): Frankhawthorneite, Cu2Te6+O4(OH)2, a new mineral species from the Centennial Eureka mine, Tintic District, Juab Co., Utah, USA. Canadian Mineralogist: 33: 641-647.

Canadian Mineralogist (1996): 34(1): 49-54.

Mineralogical Record (1996): 27: 464.

Roberts, A.C., Gault, R.A., Jensen, M.C., Criddle, A.J., Moffatt, E.A. (1997): Juabite, Cu5(Te6+O4)2(As5+O4)2•3H2O, a new mineral species from the Centennial Eureka mine, Juab County, Utah. Mineralogical Magazine: 61: 139-144.

Mineralogical Record (1997): 28: 177.

Burns, P.C., Clark, C.M., Gault, R.A. (2000), Juabite, CaCu10(Te4+O3)4(AsO4)4(OH)2(H2O)4: crystal structure and revision of chemical formula. Canadian Mineralogist: 38: 809-816.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10042156, 10055194 & 10102097.

Desborough, G. A., Smith, K. S., Lowers, H. A., Swayze, G. A., Hammarstrom, J. M., Diehl, S. F., Leinz, R. W. and Driscoll, R. L. (2010): Mineralogical and chemical characteristics of some natural jarosites. Geochimica et Cosmochimica Acta: 74: 1041-1056.

Pekov I.V., Chukanov N.V., Zadov A.E., Roberts A.C., Jensen M.C., Zubkova N.V., Nikischer A.J. (2010), Eurekadumpite, (Cu,Zn)16(TeO3)2(AsO4)3Cl(OH)18·7H2O, a new supergene mineral // Zapiski RMO.

Anthony, Bideaux, Bladh, Nichols: Handbook of Mineralogy, Vol. IV.

UGMS Bulletin 117, Minerals and Mineral Localities of Utah.

Mineral and/or Locality  
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