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Montreal Mine (33 Company Mine; Section 33 Mine), Montreal, Gogebic Range, Iron County, Wisconsin, USAi
Regional Level Types
Montreal Mine (33 Company Mine; Section 33 Mine)Mine (Reclaimed)
Montreal- not defined -
Gogebic RangeDeposit
Iron CountyCounty
WisconsinState
USACountry

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Latitude & Longitude (WGS84):
46° 25' 41'' North , 90° 14' 1'' West
Latitude & Longitude (decimal):
46.42810,-90.23371
GeoHash:
G#: cbrb4evz6
GRN:
N31W46
Type:
Mine (Reclaimed) - last checked 2021
KΓΆppen climate type:
Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Montreal783 (2017)0.9km
Pence131 (2017)3.2km
Hurley1,493 (2017)4.3km
Ironwood5,002 (2017)5.6km
Iron Belt173 (2017)7.6km
Mindat Locality ID:
16506
Long-form identifier:
mindat:1:2:16506:3
GUID (UUID V4):
06871fba-9869-4600-b8c1-37b2c43d3d08
Other/historical names associated with this locality:
Ottawa; Trimble; Odanah; Moore; Jupiter; Bourne


An Fe-Mn occurrence/mine located in secs. 27, 28 & 33, T46N, R2E, 4th Principal Meridian, along state route 77 between the Hennepin and Cary properties, just west of Hurley, near Montreal, on private land. Discovered in 1848 by A. Randall, who discovered low-grade magnetic material during the survey of the Fourth Principal Meridian. Owned by the Montreal Mining Company (100%), Wisconsin (1976). Operated by Oglebay, Norton and Company, Minnesota (1976). First production occurred in 1886. Production years were 1886 to at least 1950, except for 1921. The mine was predominantly an open pit operation until 1886. At the height of mining, it employed over 400 workers. As the mine grew, it engulfed a number of adjacent operations. The last ore was shipped in 1963. The USGS MRDS database stated accuracy for this locality is 10 meters.

Mineralization is in a classic Proterozoic banded iron formation (the Ironwood Formation) (Mineral occurrence model information: Model code: 241; USGS model code: 34a; BC deposit profile: F10; Deposit model name: Superior Fe [BC name is Lake Superior & Rapitan types iron-formation]), hosted in the Neoproterozoic Ironwood Formation. The ore body is stratabound and dips 50-55N. Controls for ore emplacement included oxidation and leaching of unaltered banded-iron formation to soft iron-oxide ore bodies. The iron formation strikes NE-SW and dips north. It is cross-cut by diabasic dikes, which have localized a number of oxidized zone in the iron formation with large open pockets filled with a variety of minerals. Local alteration described as the Gogebic Iron Range is in the chlorite metamorphic zone in the least metamorphosed area of the Upper Peninsula. Local rocks include rocks of the Menominee Group; Ironwood Iron-formation.

Regional geologic structures include N-dipping sediments; regional trends are East To West. Local structures include an E-W linear iron formation going From Gogebic, Michigan, to Ironwood, Michigan, and to Mellen, Wisconsin, and a bit farther W.

Workings include underground openings. Test pits were first dug in the deposit and the first shaft sunk in 1882. Workings featured the #4, #5 & #6 shafts; 20th., 37th., 38th. & 42nd. levels. The workings extended to a depth of 4,518 feet.

The Montreal mine, operated by the Montreal Mining Co., is four miles west of Ironwood, Mich., in Iron County, Wisconsin. It is the westernmost producing property on the Gogebic Iron Range of the Lake Superior district. Its production is 4,000 tons of hematite per day from an average depth of 2300 feet. This tonnage is hoisted through a five-compartment vertical shaft. Several mining methods are in use but in the larger ore bodies the method is sub-level caving. … The main ore bodies of the Montreal mine lie in eastward-pitching troughs formed by the intersections of intrusive dikes with impervious members of the iron formation. The formation has an average width of 425 ft., strikes east and west and dips north at approximately 62. The dikes dip south at 45Β° and bear north 20' from the strike of the formation, making the intersections with various members pitch east at 16Β°. The dikes are not continuous across the formation but are interrupted by a longitudinal bedding fault, which has a throw of 380 ft. vertically and 885 ft. horizontally. North of the fault zone the formation is called "hanging," south it is called "footwall" formation. The faulting has created two ore-bearing horizons; viz., at the intersection of hanging dikes with the slate members and the foot dikes with the quartzite footwall. In each formation the main ore-bearing member consists of wavy beds of hard chert interlaid with hematite. In the most productive part of the mine, where the sub-level caving method is employed, a hanging-formation dike lies in juxtaposition with a footwall dike and the iron formation carries ore in certain sections from the quartzite footwall to the hanging dike. Here a horizontal section of the ore body may be 300 to 400 feet wide for a length of 150 feet or more and tail out lengthwise in both the foot and hanging formations. The footwall ore section is much longer than the hanging wall because of the ore body's greater height above the "pitching dike."

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


30 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

β“˜ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
β“˜ Analcime
Formula: Na(AlSi2O6) · H2O
β“˜ Baryte
Formula: BaSO4
Habit: elongated baldes and spear shaped crystals.
Colour: pink, orange
β“˜ Braunite
Formula: Mn2+Mn3+6(SiO4)O8
β“˜ Calcite
Formula: CaCO3
β“˜ Calcite var. Manganese-bearing Calcite
Formula: (Ca,Mn)CO3
β“˜ Celestine
Formula: SrSO4
β“˜ Cryptomelane
Formula: K(Mn4+7Mn3+)O16
β“˜ Dickite
Formula: Al2(Si2O5)(OH)4
β“˜ Dolomite
Formula: CaMg(CO3)2
β“˜ Galena
Formula: PbS
β“˜ Goethite
Formula: Ξ±-Fe3+O(OH)
β“˜ Gypsum
Formula: CaSO4 · 2H2O
β“˜ Gypsum var. Selenite
Formula: CaSO4 · 2H2O
β“˜ Hematite
Formula: Fe2O3
β“˜ Hollandite
Formula: Ba(Mn4+6Mn3+2)O16
β“˜ Kaolinite
Formula: Al2(Si2O5)(OH)4
β“˜ Kutnohorite
Formula: CaMn2+(CO3)2
β“˜ Magnetite
Formula: Fe2+Fe3+2O4
β“˜ Manganite
Formula: Mn3+O(OH)
β“˜ Marcasite
Formula: FeS2
β“˜ Minnesotaite
Formula: Fe2+3Si4O10(OH)2
β“˜ Neotocite
Formula: (Mn,Fe,Mg)SiO3 · H2O
β“˜ Pyrite
Formula: FeS2
β“˜ Pyrolusite
Formula: Mn4+O2
β“˜ Quartz
Formula: SiO2
β“˜ Rhodochrosite
Formula: MnCO3
β“˜ RomanΓ¨chite
Formula: (Ba,H2O)2(Mn4+,Mn3+)5O10
β“˜ Siderite
Formula: FeCO3
β“˜ Stilpnomelane
Formula: (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
β“˜ Talc
Formula: Mg3Si4O10(OH)2
β“˜ Vanadinite ?
Formula: Pb5(VO4)3Cl

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
β“˜Galena2.CD.10PbS
β“˜Pyrite2.EB.05aFeS2
β“˜Marcasite2.EB.10aFeS2
Group 4 - Oxides and Hydroxides
β“˜Goethite4.00.Ξ±-Fe3+O(OH)
β“˜Magnetite4.BB.05Fe2+Fe3+2O4
β“˜Hematite4.CB.05Fe2O3
β“˜Quartz4.DA.05SiO2
β“˜Pyrolusite4.DB.05Mn4+O2
β“˜Cryptomelane4.DK.05aK(Mn4+7Mn3+)O16
β“˜Hollandite4.DK.05aBa(Mn4+6Mn3+2)O16
β“˜RomanΓ¨chite4.DK.10(Ba,H2O)2(Mn4+,Mn3+)5O10
β“˜Manganite4.FD.15Mn3+O(OH)
Group 5 - Nitrates and Carbonates
β“˜Calcite5.AB.05CaCO3
β“˜Siderite5.AB.05FeCO3
β“˜Rhodochrosite5.AB.05MnCO3
β“˜Calcite
var. Manganese-bearing Calcite		5.AB.05(Ca,Mn)CO3
β“˜Dolomite5.AB.10CaMg(CO3)2
β“˜Kutnohorite5.AB.10CaMn2+(CO3)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
β“˜Celestine7.AD.35SrSO4
β“˜Baryte7.AD.35BaSO4
β“˜Gypsum
var. Selenite		7.CD.40CaSO4 Β· 2H2O
β“˜7.CD.40CaSO4 Β· 2H2O
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Vanadinite ?8.BN.05Pb5(VO4)3Cl
Group 9 - Silicates
β“˜Braunite9.AG.05Mn2+Mn3+6(SiO4)O8
β“˜Actinolite9.DE.10β—»Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
β“˜Minnesotaite9.EC.05Fe2+3Si4O10(OH)2
β“˜Talc9.EC.05Mg3Si4O10(OH)2
β“˜Kaolinite9.ED.05Al2(Si2O5)(OH)4
β“˜Dickite9.ED.05Al2(Si2O5)(OH)4
β“˜Neotocite9.ED.20(Mn,Fe,Mg)SiO3 Β· H2O
β“˜Stilpnomelane9.EG.40(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 Β· nH2O
β“˜Analcime9.GB.05Na(AlSi2O6) Β· H2O

List of minerals for each chemical element

HHydrogen
Hβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hβ“˜ AnalcimeNa(AlSi2O6) · H2O
Hβ“˜ DickiteAl2(Si2O5)(OH)4
Hβ“˜ GoethiteΞ±-Fe3+O(OH)
Hβ“˜ GypsumCaSO4 · 2H2O
Hβ“˜ KaoliniteAl2(Si2O5)(OH)4
Hβ“˜ ManganiteMn3+O(OH)
Hβ“˜ MinnesotaiteFe32+Si4O10(OH)2
Hβ“˜ Neotocite(Mn,Fe,Mg)SiO3 · H2O
Hβ“˜ RomanΓ¨chite(Ba,H2O)2(Mn4+,Mn3+)5O10
Hβ“˜ Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Hβ“˜ TalcMg3Si4O10(OH)2
Hβ“˜ Gypsum var. SeleniteCaSO4 · 2H2O
CCarbon
Cβ“˜ CalciteCaCO3
Cβ“˜ DolomiteCaMg(CO3)2
Cβ“˜ KutnohoriteCaMn2+(CO3)2
Cβ“˜ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Cβ“˜ RhodochrositeMnCO3
Cβ“˜ SideriteFeCO3
OOxygen
Oβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oβ“˜ AnalcimeNa(AlSi2O6) · H2O
Oβ“˜ BaryteBaSO4
Oβ“˜ BrauniteMn2+Mn63+(SiO4)O8
Oβ“˜ CalciteCaCO3
Oβ“˜ CelestineSrSO4
Oβ“˜ CryptomelaneK(Mn74+Mn3+)O16
Oβ“˜ DickiteAl2(Si2O5)(OH)4
Oβ“˜ DolomiteCaMg(CO3)2
Oβ“˜ GoethiteΞ±-Fe3+O(OH)
Oβ“˜ GypsumCaSO4 · 2H2O
Oβ“˜ HematiteFe2O3
Oβ“˜ HollanditeBa(Mn64+Mn23+)O16
Oβ“˜ KaoliniteAl2(Si2O5)(OH)4
Oβ“˜ KutnohoriteCaMn2+(CO3)2
Oβ“˜ ManganiteMn3+O(OH)
Oβ“˜ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Oβ“˜ MagnetiteFe2+Fe23+O4
Oβ“˜ MinnesotaiteFe32+Si4O10(OH)2
Oβ“˜ Neotocite(Mn,Fe,Mg)SiO3 · H2O
Oβ“˜ PyrolusiteMn4+O2
Oβ“˜ QuartzSiO2
Oβ“˜ RhodochrositeMnCO3
Oβ“˜ RomanΓ¨chite(Ba,H2O)2(Mn4+,Mn3+)5O10
Oβ“˜ SideriteFeCO3
Oβ“˜ Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Oβ“˜ TalcMg3Si4O10(OH)2
Oβ“˜ VanadinitePb5(VO4)3Cl
Oβ“˜ Gypsum var. SeleniteCaSO4 · 2H2O
NaSodium
Naβ“˜ AnalcimeNa(AlSi2O6) · H2O
Naβ“˜ Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
MgMagnesium
Mgβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mgβ“˜ DolomiteCaMg(CO3)2
Mgβ“˜ Neotocite(Mn,Fe,Mg)SiO3 · H2O
Mgβ“˜ Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Mgβ“˜ TalcMg3Si4O10(OH)2
AlAluminium
Alβ“˜ AnalcimeNa(AlSi2O6) · H2O
Alβ“˜ DickiteAl2(Si2O5)(OH)4
Alβ“˜ KaoliniteAl2(Si2O5)(OH)4
Alβ“˜ Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
SiSilicon
Siβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siβ“˜ AnalcimeNa(AlSi2O6) · H2O
Siβ“˜ BrauniteMn2+Mn63+(SiO4)O8
Siβ“˜ DickiteAl2(Si2O5)(OH)4
Siβ“˜ KaoliniteAl2(Si2O5)(OH)4
Siβ“˜ MinnesotaiteFe32+Si4O10(OH)2
Siβ“˜ Neotocite(Mn,Fe,Mg)SiO3 · H2O
Siβ“˜ QuartzSiO2
Siβ“˜ Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Siβ“˜ TalcMg3Si4O10(OH)2
SSulfur
Sβ“˜ BaryteBaSO4
Sβ“˜ CelestineSrSO4
Sβ“˜ GalenaPbS
Sβ“˜ GypsumCaSO4 · 2H2O
Sβ“˜ MarcasiteFeS2
Sβ“˜ PyriteFeS2
Sβ“˜ Gypsum var. SeleniteCaSO4 · 2H2O
ClChlorine
Clβ“˜ VanadinitePb5(VO4)3Cl
KPotassium
Kβ“˜ CryptomelaneK(Mn74+Mn3+)O16
Kβ“˜ Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
CaCalcium
Caβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caβ“˜ CalciteCaCO3
Caβ“˜ DolomiteCaMg(CO3)2
Caβ“˜ GypsumCaSO4 · 2H2O
Caβ“˜ KutnohoriteCaMn2+(CO3)2
Caβ“˜ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Caβ“˜ Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Caβ“˜ Gypsum var. SeleniteCaSO4 · 2H2O
VVanadium
Vβ“˜ VanadinitePb5(VO4)3Cl
MnManganese
Mnβ“˜ BrauniteMn2+Mn63+(SiO4)O8
Mnβ“˜ CryptomelaneK(Mn74+Mn3+)O16
Mnβ“˜ HollanditeBa(Mn64+Mn23+)O16
Mnβ“˜ KutnohoriteCaMn2+(CO3)2
Mnβ“˜ ManganiteMn3+O(OH)
Mnβ“˜ Calcite var. Manganese-bearing Calcite(Ca,Mn)CO3
Mnβ“˜ Neotocite(Mn,Fe,Mg)SiO3 · H2O
Mnβ“˜ PyrolusiteMn4+O2
Mnβ“˜ RhodochrositeMnCO3
Mnβ“˜ RomanΓ¨chite(Ba,H2O)2(Mn4+,Mn3+)5O10
FeIron
Feβ“˜ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feβ“˜ GoethiteΞ±-Fe3+O(OH)
Feβ“˜ HematiteFe2O3
Feβ“˜ MagnetiteFe2+Fe23+O4
Feβ“˜ MarcasiteFeS2
Feβ“˜ MinnesotaiteFe32+Si4O10(OH)2
Feβ“˜ Neotocite(Mn,Fe,Mg)SiO3 · H2O
Feβ“˜ PyriteFeS2
Feβ“˜ SideriteFeCO3
Feβ“˜ Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
SrStrontium
Srβ“˜ CelestineSrSO4
BaBarium
Baβ“˜ BaryteBaSO4
Baβ“˜ HollanditeBa(Mn64+Mn23+)O16
Baβ“˜ RomanΓ¨chite(Ba,H2O)2(Mn4+,Mn3+)5O10
PbLead
Pbβ“˜ GalenaPbS
Pbβ“˜ VanadinitePb5(VO4)3Cl

Other Databases

Link to USGS MRDS:10082661

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate
USA

This page 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

USGS MRDS ID #W062010.
Dickey, R. M. (1938): Manganese in the Montreal Mine, Montreal, Wisconsin: Economic Geology, 33: 600-624.
[1]AIME (1940), Report (1/1/1940).
Fritz, D. E. (1942), The Elimination of Chutes for Tram-Car Loading at the Montreal Mine. Proceedings of the 19th Mine Safety Conference, Lake Superior Mining Section, National Safety Council ... 1940, 43 pp.
Lake Superior Iron Ore Association (1952), Lake Superior iron ores: mining directory and statistics: 56-57.
Schmidt, R G. (1980): The Marquette Range Supergroup in the Gogebic iron district, Michigan and Wisconsin: U. S. Geological Survey Bulletin 1460, 96 p.
La Berge, G. (1984) The Geologic History of Wisconsin: Rocks and Minerals 59 (2), 60-73.
U.S. Bureau of Mines (1995), Minerals Availability System/Mineral Industry Location System (MAS/MILS), U.S. Bureau of Mines, file ID #0550510001.
Cox, B. (2005) Mines of the Pewabic Country of Michigan and Wisconsin: vol. 3 Wisconsin Iron: Agogebic Press: 88-91.
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
Robinson, G. & G. LaBerge (2013) Minerals of the Lake Superior Iron Ranges: A. E. Seaman Mineral Museum: Michigan Technological University, 52 p.
Stefano, C. (2020) The Montreal Mine, Iron County, Wisconsin: The Mineralogical Record 51 (3), 413-455.
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