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Ajax Mine (Copperopolis; Sioux Ajax; American Eagle; Am. Eagle), Mammoth, Tintic District, East Tintic Mts, Juab Co., Utah, USA

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Latitude & Longitude (WGS84): 39° 55' 39'' North , 112° 6' 45'' West
Latitude & Longitude (decimal): 39.92750,-112.11250
GeoHash:G#: 9x070ud4t
Locality type:Mine
Köppen climate type:Dfb : Warm-summer humid continental climate


A former Ag-Au-Cu-Pb-Fe occurrence/mine located 1.2 km (0.7 mile) E of Mammoth (head of canyon, 3000 feet S 57 W of Mammoth Peak on lower W slope of the mountain), on private land. Owned by the Gold Chain Mining Co., C/O E.S. Mcintyre, Eureka, Utah. Operated by the Mammoth Mining Company (1930- ). MRDS database accuracy for this location is not stated. Consolidated in 1909 with the Cleveland, Pedro and Gold Chain group as the Gold Chain Mine. Explored in 1926 from the 1800 level of the Lower Mammoth Mine.

Mineralization is hosted in Late Cambrian dolomite (Ajax Dolomite; Opex Formation). The ore body is a chimney with a length of 609.6 meters, a depth-to-bottom of 304.8 meters. North-trending fissures with NE offshoots are present. Beds strike N55W and dip 20NE. Fractures trend N-S, N25E, N35E, N65E, N55W and dip 70-90W. Gossan deposit. Strikes N to W of the Mammoth pipe. Local geologic structures include horizontal ore shoots along beddings. Local alteration includes contact metamorphism. Local rocks include Upper Cambrian carbonate rocks in central Utah.

Workings include underground openings with an overall depth of 335.28 meters and an overall length of 609.6 meters. The old shaft is caved into the stopes and is dangerous. There is a 400 foot adit (Ajax adit), an internal shaft (winze ?) and shallow surface workings. The Ajax shaft at 1,100 feet deep was used in 1917, and was sunk from the Ajax adit 400 feet from the portal. In all there are several shafts.

Production amounted to $3,000,000 (period values) of Cu, Ag & Au from the Ajax and Gold Chain mines during the period 1899 to 1917.

Analytical data results: 0.6 ounce Au; 2 to 14 ounces Ag; 2 to 8% Cu; 50 to 70% Si; 1% Zn.

Regions containing this locality

Rocky Mountains, North America

Mountain Range - 2,039 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


15 valid minerals.

Detailed Mineral List:

Aragonite
Formula: CaCO3
Arseniosiderite ?
Formula: Ca2Fe3+3(AsO4)3O2 · 3H2O
Reference: Rick Dalrymple Collection
Chalcophyllite
Formula: Cu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
Reference: UGMS Bull 117 Minerals and Mineral Localities of Utah
Conichalcite
Formula: CaCu(AsO4)(OH)
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Copper
Formula: Cu
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Descloizite ?
Formula: PbZn(VO4)(OH)
Reference: In the collection of Alex Earl
Enargite
Formula: Cu3AsS4
Reference: UGMS Bull 117 Minerals and Mineral Localities of Utah; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Goethite
Formula: α-Fe3+O(OH)
Reference: Harvard Museum of Natural History specimen no. 96656
Hemimorphite
Formula: Zn4Si2O7(OH)2 · H2O
Reference: In the collection of Alex Earl
Kettnerite
Formula: CaBiCO3OF
Reference: Collected by and in the collection of Brent Thorne.
Mixite
Formula: BiCu6(AsO4)3(OH)6 · 3H2O
Reference: UGMS Bull 117 Minerals and Mineral Localities of Utah
Olivenite
Formula: Cu2(AsO4)(OH)
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Quartz
Formula: SiO2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Scorodite
Formula: Fe3+AsO4 · 2H2O
Reference: Rob Lavinsky specimen
Tyrolite
Formula: Ca2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
Reference: UGMS Bull 117 Minerals and Mineral Localities of Utah

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Copper'1.AA.05Cu
Group 2 - Sulphides and Sulfosalts
'Enargite'2.KA.05Cu3AsS4
Group 4 - Oxides and Hydroxides
'Goethite'4.00.α-Fe3+O(OH)
'Quartz'4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Aragonite'5.AB.15CaCO3
'Kettnerite'5.BE.30CaBiCO3OF
Group 8 - Phosphates, Arsenates and Vanadates
'Arseniosiderite' ?8.DH.30Ca2Fe3+3(AsO4)3O2 · 3H2O
'Chalcophyllite'8.DF.30Cu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
'Conichalcite'8.BH.35CaCu(AsO4)(OH)
'Descloizite' ?8.BH.40PbZn(VO4)(OH)
'Mixite'8.DL.15BiCu6(AsO4)3(OH)6 · 3H2O
'Olivenite'8.BB.30Cu2(AsO4)(OH)
'Scorodite'8.CD.10Fe3+AsO4 · 2H2O
'Tyrolite'8.DM.10Ca2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
Group 9 - Silicates
'Hemimorphite'9.BD.10Zn4Si2O7(OH)2 · H2O

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Copper1.1.1.3Cu
Group 3 - SULFOSALTS
ø = 4
Enargite3.2.1.1Cu3AsS4
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Kettnerite16a.3.7.1CaBiCO3OF
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
(AB)5(XO4)2·xH2O
Scorodite40.4.1.3Fe3+AsO4 · 2H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Conichalcite41.5.1.2CaCu(AsO4)(OH)
Descloizite ?41.5.2.1PbZn(VO4)(OH)
A2(XO4)Zq
Olivenite41.6.6.1Cu2(AsO4)(OH)
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)5(XO4)2Zq·xH2O
Tyrolite42.4.3.1Ca2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
(AB)7(XO4)3Zq·xH2O
Mixite42.5.1.1BiCu6(AsO4)3(OH)6 · 3H2O
(AB)5(XO4)3Zq·xH2O
Arseniosiderite ?42.8.4.3Ca2Fe3+3(AsO4)3O2 · 3H2O
Group 43 - COMPOUND PHOSPHATES, ETC.
Hydrated Compound Phosphates, etc·, Containing Hydroxyl or Halogen
Chalcophyllite43.5.14.1Cu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] coordination
Hemimorphite56.1.2.1Zn4Si2O7(OH)2 · H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
Aragonite-CaCO3

List of minerals for each chemical element

HHydrogen
H ArseniosideriteCa2Fe33+(AsO4)3O2 · 3H2O
H ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
H ConichalciteCaCu(AsO4)(OH)
H DescloizitePbZn(VO4)(OH)
H Goethiteα-Fe3+O(OH)
H HemimorphiteZn4Si2O7(OH)2 · H2O
H MixiteBiCu6(AsO4)3(OH)6 · 3H2O
H OliveniteCu2(AsO4)(OH)
H ScoroditeFe3+AsO4 · 2H2O
H TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
CCarbon
C AragoniteCaCO3
C KettneriteCaBiCO3OF
C TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
OOxygen
O AragoniteCaCO3
O ArseniosideriteCa2Fe33+(AsO4)3O2 · 3H2O
O ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
O ConichalciteCaCu(AsO4)(OH)
O DescloizitePbZn(VO4)(OH)
O Goethiteα-Fe3+O(OH)
O HemimorphiteZn4Si2O7(OH)2 · H2O
O KettneriteCaBiCO3OF
O MixiteBiCu6(AsO4)3(OH)6 · 3H2O
O OliveniteCu2(AsO4)(OH)
O QuartzSiO2
O ScoroditeFe3+AsO4 · 2H2O
O TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
FFluorine
F KettneriteCaBiCO3OF
AlAluminium
Al ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
SiSilicon
Si HemimorphiteZn4Si2O7(OH)2 · H2O
Si QuartzSiO2
SSulfur
S ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
S EnargiteCu3AsS4
CaCalcium
Ca AragoniteCaCO3
Ca ArseniosideriteCa2Fe33+(AsO4)3O2 · 3H2O
Ca ConichalciteCaCu(AsO4)(OH)
Ca KettneriteCaBiCO3OF
Ca TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
VVanadium
V DescloizitePbZn(VO4)(OH)
FeIron
Fe ArseniosideriteCa2Fe33+(AsO4)3O2 · 3H2O
Fe Goethiteα-Fe3+O(OH)
Fe ScoroditeFe3+AsO4 · 2H2O
CuCopper
Cu ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
Cu ConichalciteCaCu(AsO4)(OH)
Cu CopperCu
Cu EnargiteCu3AsS4
Cu MixiteBiCu6(AsO4)3(OH)6 · 3H2O
Cu OliveniteCu2(AsO4)(OH)
Cu TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
ZnZinc
Zn DescloizitePbZn(VO4)(OH)
Zn HemimorphiteZn4Si2O7(OH)2 · H2O
AsArsenic
As ArseniosideriteCa2Fe33+(AsO4)3O2 · 3H2O
As ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
As ConichalciteCaCu(AsO4)(OH)
As EnargiteCu3AsS4
As MixiteBiCu6(AsO4)3(OH)6 · 3H2O
As OliveniteCu2(AsO4)(OH)
As ScoroditeFe3+AsO4 · 2H2O
As TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
PbLead
Pb DescloizitePbZn(VO4)(OH)
BiBismuth
Bi KettneriteCaBiCO3OF
Bi MixiteBiCu6(AsO4)3(OH)6 · 3H2O

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Quaternary - Miocene
0 - 23.03 Ma



ID: 3185380
Cenozoic sedimentary rocks

Age: Cenozoic (0 - 23.03 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Early Ordovician - Furongian
470 - 497 Ma



ID: 3012991
Ajax Dolomite and Opex Formation

Age: Paleozoic (470 - 497 Ma)

Stratigraphic Name: Ajax Dolomite; Opex Formation

Description: Ajax Dolomite and Opex Formation (upper member of Maxfield Limestone).

Comments: Original map source: Hintze, L.F., Willis, G.C., Laes, D.Y.M., Sprinkel, D.A., and Brown, K.D., 2000, Digital Geologic Map of Utah: Utah Geological Survey, Map 179DM, scale 1:500,000.

Lithology: Major:{dolostone}, Minor:{limestone,shale}, Incidental:{chert}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Late Cambrian
485.4 - 501 Ma



ID: 3342345
Ajax Dolomite and Opex Formation, undivided

Age: Cambrian (485.4 - 501 Ma)

Stratigraphic Name: Ajax Dolomite; Opex Formation

Description: Medium- to dark-gray, partly mottled, medium-bedded cherty dolomite, creamy-white, medium and
coarse-grained massive dolomite, medium- to dark-gray, massive-bedded cherty dolomite, and light-gray, thin-bedded limestone, shale, sandstone and dolomite. Present in northeast corner of map, in the lower plate of the Tintic Valley thrust, where it is 225-310 m thick

Reference: Pampeyan, E.H. Geologic map of the Lynndyl 30′ x 60′ quadrangle, west-central Utah (digitized 2005). Utah Geological Survey Miscellaneous Investigations Series Map I-1830. [193]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Tower, Jr., G.W., and Smith, G.O. (1898), USGS 19th. Annual Report, volume III: 744.
Lindgren, Waldemar, and Loughlin, G.F. (1919), Geology and Ore Deposits of the Tintic Mining District, USGS Professional Paper 107, 276 pp.: 134.
Cook, D.R. (1957), Geology of the East Tintic Mountains and Ore Deposits of the Tintic Mining District: Utah Geological Society Guidebook 12: 9, Pl. 3.
Morris, H.T. (1964), Geology of the Eureka Quadrangle, Utah and Juab Counties, Utah,USGS Bulletin 1142-K: K1-K29.
Morris, H.T. (1968), The Main Tintic Mining District, in: Ridge, J.D., editor, Graton Sales Volume, A.I.M.E.
Conservation Division Comp. date (1970), (08-07-1970).
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.
McIntyre, E. Steele (1983), personal interview (October, 1983) (Mammoth Mine; Gold Chain Mine).
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10020098 & 10042164.
UGMS Bulletin 117 Minerals and Mineral Localities of Utah.


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