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Copper Mountain Mine (Manganese Blue Mine; Copper Mountain claim working; Old Blue shaft; Detroit Copper Co. group; Manganese Blue ore body), Morenci, Copper Mountain District (Clifton-Morenci District), Shannon Mts, Greenlee Co., Arizona, USAi
Regional Level Types
Copper Mountain Mine (Manganese Blue Mine; Copper Mountain claim working; Old Blue shaft; Detroit Copper Co. group; Manganese Blue ore body)Mine
Morenci- not defined -
Copper Mountain District (Clifton-Morenci District)Mining District
Shannon MtsMountain Range
Greenlee Co.County
ArizonaState
USACountry

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Key
Latitude & Longitude (WGS84):
33° 4' 32'' North , 109° 22' 4'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Morenci1,489 (2011)0.4km
Clifton3,685 (2017)7.2km
York557 (2011)25.4km
San Jose506 (2011)35.3km
Solomon426 (2011)38.4km


A former surface and underground Cu-Zn mine located in the SE¼SW¼SW¼SE¼ sec. 16, T4S, R29E, SW of the Humboldt shaft, SE of the Arizona Central shaft, under the present town of Morenci, on private land. Discovered in 1872 by W.L. Ryerson, John Swisshelm, Jim Bullard and Joe Yankie. Produced 1882-1920. Owned and operated by the Phelps Dodge Corp., Morenci Branch (1917-____). Past owners included the Detroit Copper Mining Co. of Arizona. The Copper Mountain Mine opens onto the Arizona Central vein and onto several irregular carbonate deposits in limestone. The Manganese Blue ore body and shaft are also located on the Copper Mountain claim; the Copper Mountain Mine tunnel extends onto the Arizona Central claim.

Mineralization is an irregular ore body hosted in the Longfellow Limestone. The ore zone has a depth to top of 30.48 meters and a depth to bottom of 121.92 meters, striking N15E and dipping 70SE. An associated rock unit is the Morenci Granite Porphyry. Ore control was NE-trending fissure veins containing an enormous deposit of low-grade chalcocite ore, changing to poor primary sulfides at varying depth. Ore concentration was extensive surface leaching on the downthrow side of the Copper Mountain fault to depths of 200 feet. Secondary enrichment of chalcocite ore about 300 feet deep. Alteration is oxidation to greatly varying depths. Chalcocite coats large bodies of sericitized porphyry containing disseminated pyrite.

Intergrowths of magnetite, pyrite, sphalerite, and chalcopyrite are irregularly distributed in the carbonates. The chalcocite ore body is usually considered to be a part of the Humboldt lode or an extension of the Wellington vein. The Copper Mountain claim has only a few central veins or seams, unlike the other great ore bodies of Copper Mountain.
Area structures include the Copper Mountain fault, which separates rich, disseminated chalcocite ore from barren porphyry. Cuprite and copper carbonates occur, associated with a small mass of limestone embedded in porphyry, on the boundary between the Copper Mountain and Humboldt Mines. South of the main adit is a rich, well-defined chalcocite seam about 14 inches wide. The ore bodies are contained between two porphyry dikes about 400 to 500 fet apart (Joy Dike and the Hummingbird Dike).


Tectonic component is the complex Copper Mountain fault system with substantial vertical displacement. Fault blocks generally downthrown to the NE.

Workings total 304.8 meters long and 152.4 meters deep. Developments included a 1000 foot tunnel that runs to the NW, 500 feet below the western crest of Copper Mountain, in the Arizona Central claim. Several stopes in the Copper Mountain and Blue Manganese lodes, reaching 100 feet in width; extensive drifting along veins. Production data included in Detroit Copper Co. mines; other Detroit Copper Co. mines are the Arizona Central, Manganese Blue, Ryerson, Yankie, and Montezuma mines.

Regions containing this locality

North America PlateTectonic Plate
Sonoran Desert, North AmericaDesert

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


16 valid minerals.

Detailed Mineral List:

Azurite
Formula: Cu3(CO3)2(OH)2
Description: Occurs as sheaflike & spherical masses up to 40 pounds in kaolinized shale.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 125; Kunz, G.F. (1885), On remarkable copper minerals from AZ, Annals N.Y. Acad. Sci.: 3: 275-278; Farrington, O.C. (1891), On crystallized azurite from AZ, Amer. Jour. Sci.: 41: 300-307; Schwartz, G.M. (1934), Paragenesis of the oxidized ores of copper, Econ.Geol.: 29: 55-75; Univ. AZ Bull. 41 (1916-17), Mineralogy of Useful Minerals in AZ: 23; Bideaux, R.A. (1973), The collector (on azurite), Min.Rec.: 4: 34-35; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 55.
Brochantite
Formula: Cu4(SO4)(OH)6
Reference: MRDS database Dep. ID #10088902, MRDS ID #M800424.
Chalcanthite
Formula: CuSO4 · 5H2O
Reference: MRDS database Dep. ID #10088902, MRDS ID #M800424.
Chalcocite
Formula: Cu2S
Reference: MRDS database Dep. ID #10088902, MRDS ID #M800424.
Chalcopyrite
Formula: CuFeS2
Reference: MRDS database Dep. ID #10104152, MRDS ID #M800423.
Copper
Formula: Cu
Reference: Dana 6:1094.
Cuprite
Formula: Cu2O
Reference: Dana 6:1094.
Cuprite var: Chalcotrichite
Formula: Cu2O
Reference: Dana 6:1094.
Cyanotrichite
Formula: Cu4Al2(SO4)(OH)12 · 2H2O
Description: Occurs as narrow seams in siliceous gangue, coated with earthy hematite; incrustations t0 2mm thick & thin fibers & small tufts in cavities.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 198; Genth, F.A. (1890), Contributions to Mineralogy, Amer. Jour. Sci,. 40: 114.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: MRDS database Dep. ID #10088902, MRDS ID #M800424.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: MRDS database Dep. ID #10088902, MRDS ID #M800424.
Gypsum
Formula: CaSO4 · 2H2O
Reference: MRDS database Dep. ID #10104152, MRDS ID #M800423.
Hematite
Formula: Fe2O3
Description: As earthy coatings on cyanotrichite.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 246; Lindgren, W. (1905), The copper deposits of the Clifton-Morenci district, AZ, USGS PP 43; Univ. AZ Bull. 41 (1916-17), Mineralogy of Useful Minerals in AZ: 40.
Kaolinite
Formula: Al2(Si2O5)(OH)4
Colour: Snow-white
Description: Occurs in kaolinized shale.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 266; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 108; Lindgren, W. (1905), The copper deposits of the Clifton-Morenci district, AZ, USGS PP 43: 212.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: MRDS database Dep. ID #10104152, MRDS ID #M800423.
Magnetite
Formula: Fe2+Fe3+2O4
Description: Mined as a flux.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 284; Lindgren, W. (1905), The copper deposits of the Clifton-Morenci district, AZ, USGS PP 43; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 39.
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 286; Lindgren, W. (1903), The copper deposits of Clifton, AZ, Engr. Mining Jour.: 75: 705; Lindgren, W. (1904), The genesis of copper deposits, Engr. MiningJour.: 78: 987; Lindgren, W. (1905), The copper deposits of the Clifton-Morenci district, AZ, USGS PP 43; Reber, Jr., L.E. (1916), The mineralization at Clifton-Morenci, Econ.Geol.: 11: 528-573; Schwartz, G.M. (1934), Paragenesis of the oxidized ores of copper, Econ.Geol.: 29: 55-75; Grout, F.E. (1946), Microscopic characters of vein carbonates, Econ.Geol.: 41: 475-502; Univ. AZ Bull. 41 (1916-17), Mineralogy of Useful Minerals in AZ: 44.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: MRDS database Dep. ID #10088902, MRDS ID #M800424.
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Reference: MRDS database Dep. ID #10088902, MRDS ID #M800424.
Pyrite
Formula: FeS2
Reference: MRDS database Dep. ID #10088902, MRDS ID #M800424.
'Pyroxene Group'
Reference: MRDS database Dep. ID #10104152, MRDS ID #M800423.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Copper1.AA.05Cu
Group 2 - Sulphides and Sulfosalts
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Cuprite4.AA.10Cu2O
var: Chalcotrichite4.AA.10Cu2O
Hematite4.CB.05Fe2O3
Magnetite4.BB.05Fe2+Fe3+2O4
Group 5 - Nitrates and Carbonates
Azurite5.BA.05Cu3(CO3)2(OH)2
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Brochantite7.BB.25Cu4(SO4)(OH)6
Chalcanthite7.CB.20CuSO4 · 5H2O
Cyanotrichite7.DE.10Cu4Al2(SO4)(OH)12 · 2H2O
Gypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified Minerals, Rocks, etc.
'Garnet Group'-X3Z2(SiO4)3
'Limonite'-(Fe,O,OH,H2O)
'Pyroxene Group'-

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 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X
Cuprite4.1.1.1Cu2O
A2X3
Hematite4.3.1.2Fe2O3
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Azurite16a.2.1.1Cu3(CO3)2(OH)2
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Chalcanthite29.6.7.1CuSO4 · 5H2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)m(XO4)pZq, where m:p>2:1
Brochantite30.1.3.1Cu4(SO4)(OH)6
Group 31 - HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)6(XO4)Zq·xH2O
Cyanotrichite31.2.1.1Cu4Al2(SO4)(OH)12 · 2H2O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Unclassified Minerals, Mixtures, etc.
Cuprite
var: Chalcotrichite
-Cu2O
'Garnet Group'-X3Z2(SiO4)3
Kaolinite-Al2(Si2O5)(OH)4
'Limonite'-(Fe,O,OH,H2O)
Muscovite
var: Sericite
-KAl2(AlSi3O10)(OH)2
'Pyroxene Group'-

List of minerals for each chemical element

HHydrogen
H AzuriteCu3(CO3)2(OH)2
H CyanotrichiteCu4Al2(SO4)(OH)12 · 2H2O
H KaoliniteAl2(Si2O5)(OH)4
H MalachiteCu2(CO3)(OH)2
H GypsumCaSO4 · 2H2O
H Limonite(Fe,O,OH,H2O)
H BrochantiteCu4(SO4)(OH)6
H ChalcanthiteCuSO4 · 5H2O
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
CCarbon
C AzuriteCu3(CO3)2(OH)2
C MalachiteCu2(CO3)(OH)2
OOxygen
O CupriteCu2O
O Cuprite (var: Chalcotrichite)Cu2O
O AzuriteCu3(CO3)2(OH)2
O CyanotrichiteCu4Al2(SO4)(OH)12 · 2H2O
O HematiteFe2O3
O KaoliniteAl2(Si2O5)(OH)4
O MalachiteCu2(CO3)(OH)2
O GypsumCaSO4 · 2H2O
O Limonite(Fe,O,OH,H2O)
O MagnetiteFe2+Fe23+O4
O BrochantiteCu4(SO4)(OH)6
O ChalcanthiteCuSO4 · 5H2O
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O Garnet GroupX3Z2(SiO4)3
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O MuscoviteKAl2(AlSi3O10)(OH)2
AlAluminium
Al CyanotrichiteCu4Al2(SO4)(OH)12 · 2H2O
Al KaoliniteAl2(Si2O5)(OH)4
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si KaoliniteAl2(Si2O5)(OH)4
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si Garnet GroupX3Z2(SiO4)3
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
SSulfur
S CyanotrichiteCu4Al2(SO4)(OH)12 · 2H2O
S GypsumCaSO4 · 2H2O
S ChalcopyriteCuFeS2
S BrochantiteCu4(SO4)(OH)6
S ChalcanthiteCuSO4 · 5H2O
S ChalcociteCu2S
S PyriteFeS2
KPotassium
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca GypsumCaSO4 · 2H2O
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
FeIron
Fe HematiteFe2O3
Fe Limonite(Fe,O,OH,H2O)
Fe MagnetiteFe2+Fe23+O4
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
CuCopper
Cu CupriteCu2O
Cu Cuprite (var: Chalcotrichite)Cu2O
Cu CopperCu
Cu AzuriteCu3(CO3)2(OH)2
Cu CyanotrichiteCu4Al2(SO4)(OH)12 · 2H2O
Cu MalachiteCu2(CO3)(OH)2
Cu ChalcopyriteCuFeS2
Cu BrochantiteCu4(SO4)(OH)6
Cu ChalcanthiteCuSO4 · 5H2O
Cu ChalcociteCu2S

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Kunz, G.F. (1885), On remarkable copper minerals from Arizona, Annals of the New York Academy of Science: 3: 275-278.
Genth, F.A. (1890), Contributions to Mineralogy, American Journal of Science: 40: 114.
Farrington, O.C. (1891), On crystallized azurite from Arizona, American Journal of Science: 41: 300-307.
Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 1094.
Lindgren, W. (1903), The copper deposits of Clifton, Arizona, Engineering and Mining Journal: 75: 705.
Lindgren, W. (1904), The genesis of copper deposits, Engineering and Mining Journal: 78: 987.
Lindgren, W. (1905), The copper deposits of the Clifton-Morenci district, Arizona, USGS PP 43: 212, 276-278.
Stevens, P. (1911) The Copper Handbook: Vol. X: 734-735, Detroit Copper Mining Co. of Arizona.
Reber, Jr., L.E. (1916), The mineralization at Clifton-Morenci, Economic Geolgy: 11: 528-573.
University of Arizona Bull. 41 (1916-17), Mineralogy of Useful Minerals in Arizona: 23, 40, 44.
Schwartz, G.M. (1934), Paragenesis of the oxidized ores of copper, Economic Geology: 29: 55-75.
Grout, F.E. (1946), Microscopic characters of vein carbonates, Economic Geology: 41: 475-502.
Watt, Roberta (1956) History of Morenci, Arizona. M.A. thesis, University of Arizona.
Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 39, 55, 108.
Bideaux, R.A. (1973), The collector (on azurite), Mineralogical Record: 4: 34-35.
Bennett (1975) Geology and Origin of the Breccias in the Morenci-Metcalf District, Greenlee County, Arizona, MS thesis, University of Arizona, 153 pp.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 125, 198, 246, 266, 284, 286.
Arizona Bureau of Mines Bull. 149, No. 15.
U.S. Bureau of Mines - Arizona Bureau of Geology and Mining Technology production file data.
U.S. Bureau of Land Management Mining District Sheet #840.
MRDS database Dep. ID #10088902, MRDS ID #M800424; and Dep. ID #10104152, MRDS ID #M800423.

USGS MRDS Record:10088902
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