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Mohawk Mine, Mohawk, Allouez Township, Keweenaw County, Michigan, USAi
Regional Level Types
Mohawk MineMine
MohawkUnincorporated Community
Allouez TownshipTownship
Keweenaw CountyCounty
MichiganState
USACountry

This page kindly sponsored by Dana Slaughter
PhotosMapsSearch
Latitude & Longitude (WGS84):
47° 18' 29'' North , 88° 21' 19'' West
Latitude & Longitude (decimal):
Type:
Nearest Settlements:
PlacePopulationDistance
Ahmeek146 (2017)3.3km
Copper City187 (2017)3.6km
Calumet703 (2017)10.1km
Laurium1,941 (2017)10.3km
Lake Linden989 (2017)13.3km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Copper Country Rock and Mineral ClubDollar Bay, Michigan24km
Mindat Locality ID:
3851
Long-form identifier:
mindat:1:2:3851:8
GUID (UUID V4):
351bf0a8-aa7f-4274-b6da-06f85bc69dc9


A Cu-Ag-As occurrence/mine located in the SW¼SW¼SW¼ sec. 27, T57N, R32W, Michigan Meridian, at Mohawk (headframe hamlet), approximately 6 miles (ca. 10 km) north of Calumet on the east side of Route 41, on private land. Owned by the Fulton Mining Company (1898). Owned by Universal Oil Products (100%), Illinois (1977). The USGS MRDS database stated accuracy for this locality is 100 meters.

The Mohawk Mining Company was incorporated in 1898 with Joseph Gay as president, who took over part of the lands of Fulton Mining Company, after lumberman Ernest Koch found copper on the property in 1896. It is best known to collectors for the occurrence of mohawkite (a mixture of algodonite, domeykite, and copper). The mine also produced a large amount of native silver, especially in the upper levels. In 1923 the Mohawk Mining Company took over the Wolverine Copper Mining Company and the Michigan Copper Mining Company.

Mineralization is a Cu-Ag-As deposit (Mineral occurrence model information: Model code: 96; USGS model code: unassigned; Deposit model name: Native Cu; Mark3 model number: 99), hosted in the Stenian (1095 MA) Portage Lake Volcanics (basalt), and in the Stenian (1095 MA) Kearsarge Amygdaloid (basalt). The orebody strikes N45E and dips 35W at a thickness of 2.9 meters, a width of 1,490 meters, and a length of 3,250 meters, over an area of 250 hectares. Orebody #1 is tabular, #2 is a replacement body and lenticular, #3 is a fissure vein. The primary mode of origin was "other" and the secondary mode was fracturing. Controls for ore emplacement included an amygdaloidal basalt flow top. Wallrock alteration is slight (propylitic & bleaching).

Copper grade in the productive part of the Kearsarge lode appears to have been as rich at, or very near, the outcrop as at greater depth, but the remainder of the lode was relatively poor at the surface. Areas of low-grade ore near the surface are coincident with areas of relatively thin or cellular, impermeable lode rocks. At the S end of Mohawk, there was very good ground in the upper levels of the mine. Apparently, rocks in the upper levels of the mine were as good as those deeper. Kearsarge was one of the richest lodes – especially near the hanging wall. The lode averaged 6 to 13 feet (ca. 4 m) thick in the area of mining activity.

Local geologic structures include the Mohawkite Fissure, a fissure crossing the Kearsarge lode.

Production statistics for the Mohawkite Fissure: Period: 1900-1901, 104.7 metric tons of mohawkite ore (accurate). Further production occurred during the period 1902-1925 and totalled 117,530 metric tons of Cu (accurate).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

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

44 valid minerals. 1 (TL) - type locality of valid minerals.

Rock Types Recorded

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

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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Algodonite
Formula: (Cu1-xAsx)
Analcime
Formula: Na(AlSi2O6) · H2O
Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Annabergite
Formula: Ni3(AsO4)2 · 8H2O
Azurite
Formula: Cu3(CO3)2(OH)2
Calcite
Formula: CaCO3
Chalcocite
Formula: Cu2S
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Copper
Formula: Cu
Cuprite
Formula: Cu2O
Datolite
Formula: CaB(SiO4)(OH)
Dolomite
Formula: CaMg(CO3)2
Domeykite
Formula: Cu3As
Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Erythrite
Formula: Co3(AsO4)2 · 8H2O
Guérinite
Formula: Ca6(HAsO4)3(AsO4)2 · 10.5H2O
Gypsum
Formula: CaSO4 · 2H2O
Hematite
Formula: Fe2O3
Jeankempite (TL)
Formula: Ca5(AsO4)2(HAsO4)2 · 7H2O
Type Locality:
Kamiokite
Formula: Fe2Mo3O8
'K Feldspar'
Koutekite
Formula: Cu5As2
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Lavendulan
Formula: NaCaCu5(AsO4)4Cl · 5H2O
Maucherite
Formula: Ni11As8
Microcline
Formula: K(AlSi3O8)
'Mohawkite'
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Nickeline
Formula: NiAs
Nickelskutterudite
Formula: (Ni,Co,Fe)As3
Olivenite
Formula: Cu2(AsO4)(OH)
Pararammelsbergite
Formula: NiAs2
Paratacamite
Formula: Cu3(Cu,Zn)(OH)6Cl2
Paxite
Formula: CuAs2
Pharmacolite
Formula: Ca(HAsO4) · 2H2O
Picropharmacolite
Formula: Ca4Mg(AsO4)2(HAsO4)2 · 11H2O
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Quartz
Formula: SiO2
Quartz var. Agate
Rammelsbergite
Formula: NiAs2
Description: In veins cutting the native copper lodes. Particularly associated with domeykite, nickeline, and other arsenide minerals.
Rauenthalite
Formula: Ca3(AsO4)2 · 10H2O
Sainfeldite
Formula: Ca5(AsO4)2(AsO3OH)2 · 4H2O
Silver
Formula: Ag
Skutterudite
Formula: CoAs3
Tyrolite
Formula: Ca2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
Vladimirite
Formula: Ca4(AsO4)2(AsO3OH) · 4H2O
Weilite
Formula: Ca(HAsO4)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Copper1.AA.05Cu
Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
Algodonite2.AA.10a(Cu1-xAsx)
Domeykite2.AA.10bCu3As
Koutekite2.AA.10dCu5As2
Maucherite2.AB.15Ni11As8
Chalcocite2.BA.05Cu2S
Nickeline2.CC.05NiAs
Pararammelsbergite2.EB.10eNiAs2
Rammelsbergite2.EB.15aNiAs2
Paxite2.EB.15cCuAs2
Nickelskutterudite2.EC.05(Ni,Co,Fe)As3
Skutterudite2.EC.05CoAs3
Group 3 - Halides
Paratacamite3.DA.10cCu3(Cu,Zn)(OH)6Cl2
Group 4 - Oxides and Hydroxides
Cuprite4.AA.10Cu2O
Hematite4.CB.05Fe2O3
Kamiokite4.CB.40Fe2Mo3O8
Quartz4.DA.05SiO2
var. Agate4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Ankerite5.AB.10Ca(Fe2+,Mg)(CO3)2
Azurite5.BA.05Cu3(CO3)2(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Gypsum7.CD.40CaSO4 · 2H2O
Group 8 - Phosphates, Arsenates and Vanadates
Weilite8.AD.10Ca(HAsO4)
Olivenite8.BB.30Cu2(AsO4)(OH)
Erythrite8.CE.40Co3(AsO4)2 · 8H2O
Annabergite8.CE.40Ni3(AsO4)2 · 8H2O
Picropharmacolite8.CH.15Ca4Mg(AsO4)2(HAsO4)2 · 11H2O
Sainfeldite8.CJ.Ca5(AsO4)2(AsO3OH)2 · 4H2O
Jeankempite (TL)8.CJ.Ca5(AsO4)2(HAsO4)2 · 7H2O
Vladimirite8.CJ.25Ca4(AsO4)2(AsO3OH) · 4H2O
Rauenthalite8.CJ.40Ca3(AsO4)2 · 10H2O
Pharmacolite8.CJ.50Ca(HAsO4) · 2H2O
Guérinite8.CJ.75Ca6(HAsO4)3(AsO4)2 · 10.5H2O
Lavendulan8.DG.05NaCaCu5(AsO4)4Cl · 5H2O
Tyrolite8.DM.10Ca2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
Group 9 - Silicates
Datolite9.AJ.20CaB(SiO4)(OH)
Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Microcline9.FA.30K(AlSi3O8)
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Analcime9.GB.05Na(AlSi2O6) · H2O
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Unclassified
'Mohawkite'-
'K Feldspar'-

List of minerals for each chemical element

HHydrogen
H AnalcimeNa(AlSi2O6) · H2O
H AnnabergiteNi3(AsO4)2 · 8H2O
H AzuriteCu3(CO3)2(OH)2
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
H DatoliteCaB(SiO4)(OH)
H Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
H ErythriteCo3(AsO4)2 · 8H2O
H GuériniteCa6(HAsO4)3(AsO4)2 · 10.5H2O
H GypsumCaSO4 · 2H2O
H LaumontiteCaAl2Si4O12 · 4H2O
H LavendulanNaCaCu5(AsO4)4Cl · 5H2O
H NatroliteNa2Al2Si3O10 · 2H2O
H OliveniteCu2(AsO4)(OH)
H ParatacamiteCu3(Cu,Zn)(OH)6Cl2
H PharmacoliteCa(HAsO4) · 2H2O
H PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2O
H PrehniteCa2Al2Si3O10(OH)2
H RauenthaliteCa3(AsO4)2 · 10H2O
H SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2O
H TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
H VladimiriteCa4(AsO4)2(AsO3OH) · 4H2O
H WeiliteCa(HAsO4)
H JeankempiteCa5(AsO4)2(HAsO4)2 · 7H2O
BBoron
B DatoliteCaB(SiO4)(OH)
CCarbon
C AnkeriteCa(Fe2+,Mg)(CO3)2
C AzuriteCu3(CO3)2(OH)2
C CalciteCaCO3
C DolomiteCaMg(CO3)2
C TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
OOxygen
O AnalcimeNa(AlSi2O6) · H2O
O AnkeriteCa(Fe2+,Mg)(CO3)2
O AnnabergiteNi3(AsO4)2 · 8H2O
O AzuriteCu3(CO3)2(OH)2
O CalciteCaCO3
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
O CupriteCu2O
O DolomiteCaMg(CO3)2
O DatoliteCaB(SiO4)(OH)
O Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
O ErythriteCo3(AsO4)2 · 8H2O
O GuériniteCa6(HAsO4)3(AsO4)2 · 10.5H2O
O GypsumCaSO4 · 2H2O
O HematiteFe2O3
O KamiokiteFe2Mo3O8
O LaumontiteCaAl2Si4O12 · 4H2O
O LavendulanNaCaCu5(AsO4)4Cl · 5H2O
O MicroclineK(AlSi3O8)
O NatroliteNa2Al2Si3O10 · 2H2O
O OliveniteCu2(AsO4)(OH)
O ParatacamiteCu3(Cu,Zn)(OH)6Cl2
O PharmacoliteCa(HAsO4) · 2H2O
O PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2O
O PrehniteCa2Al2Si3O10(OH)2
O QuartzSiO2
O RauenthaliteCa3(AsO4)2 · 10H2O
O SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2O
O TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
O VladimiriteCa4(AsO4)2(AsO3OH) · 4H2O
O WeiliteCa(HAsO4)
O JeankempiteCa5(AsO4)2(HAsO4)2 · 7H2O
NaSodium
Na AnalcimeNa(AlSi2O6) · H2O
Na LavendulanNaCaCu5(AsO4)4Cl · 5H2O
Na NatroliteNa2Al2Si3O10 · 2H2O
MgMagnesium
Mg AnkeriteCa(Fe2+,Mg)(CO3)2
Mg DolomiteCaMg(CO3)2
Mg PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2O
AlAluminium
Al AnalcimeNa(AlSi2O6) · H2O
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Al Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Al LaumontiteCaAl2Si4O12 · 4H2O
Al MicroclineK(AlSi3O8)
Al NatroliteNa2Al2Si3O10 · 2H2O
Al PrehniteCa2Al2Si3O10(OH)2
SiSilicon
Si AnalcimeNa(AlSi2O6) · H2O
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Si DatoliteCaB(SiO4)(OH)
Si Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Si LaumontiteCaAl2Si4O12 · 4H2O
Si MicroclineK(AlSi3O8)
Si NatroliteNa2Al2Si3O10 · 2H2O
Si PrehniteCa2Al2Si3O10(OH)2
Si QuartzSiO2
SSulfur
S ChalcociteCu2S
S GypsumCaSO4 · 2H2O
ClChlorine
Cl LavendulanNaCaCu5(AsO4)4Cl · 5H2O
Cl ParatacamiteCu3(Cu,Zn)(OH)6Cl2
KPotassium
K MicroclineK(AlSi3O8)
CaCalcium
Ca AnkeriteCa(Fe2+,Mg)(CO3)2
Ca CalciteCaCO3
Ca DolomiteCaMg(CO3)2
Ca DatoliteCaB(SiO4)(OH)
Ca Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Ca GuériniteCa6(HAsO4)3(AsO4)2 · 10.5H2O
Ca GypsumCaSO4 · 2H2O
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca LavendulanNaCaCu5(AsO4)4Cl · 5H2O
Ca PharmacoliteCa(HAsO4) · 2H2O
Ca PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2O
Ca PrehniteCa2Al2Si3O10(OH)2
Ca RauenthaliteCa3(AsO4)2 · 10H2O
Ca SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2O
Ca TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
Ca VladimiriteCa4(AsO4)2(AsO3OH) · 4H2O
Ca WeiliteCa(HAsO4)
Ca JeankempiteCa5(AsO4)2(HAsO4)2 · 7H2O
FeIron
Fe AnkeriteCa(Fe2+,Mg)(CO3)2
Fe Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Fe HematiteFe2O3
Fe KamiokiteFe2Mo3O8
Fe Nickelskutterudite(Ni,Co,Fe)As3
CoCobalt
Co ErythriteCo3(AsO4)2 · 8H2O
Co Nickelskutterudite(Ni,Co,Fe)As3
Co SkutteruditeCoAs3
NiNickel
Ni AnnabergiteNi3(AsO4)2 · 8H2O
Ni MaucheriteNi11As8
Ni Nickelskutterudite(Ni,Co,Fe)As3
Ni NickelineNiAs
Ni PararammelsbergiteNiAs2
Ni RammelsbergiteNiAs2
CuCopper
Cu Algodonite(Cu1-xAsx)
Cu AzuriteCu3(CO3)2(OH)2
Cu ChalcociteCu2S
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Cu CupriteCu2O
Cu CopperCu
Cu DomeykiteCu3As
Cu KoutekiteCu5As2
Cu LavendulanNaCaCu5(AsO4)4Cl · 5H2O
Cu OliveniteCu2(AsO4)(OH)
Cu ParatacamiteCu3(Cu,Zn)(OH)6Cl2
Cu PaxiteCuAs2
Cu TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
ZnZinc
Zn ParatacamiteCu3(Cu,Zn)(OH)6Cl2
AsArsenic
As Algodonite(Cu1-xAsx)
As AnnabergiteNi3(AsO4)2 · 8H2O
As DomeykiteCu3As
As ErythriteCo3(AsO4)2 · 8H2O
As GuériniteCa6(HAsO4)3(AsO4)2 · 10.5H2O
As KoutekiteCu5As2
As LavendulanNaCaCu5(AsO4)4Cl · 5H2O
As MaucheriteNi11As8
As Nickelskutterudite(Ni,Co,Fe)As3
As NickelineNiAs
As OliveniteCu2(AsO4)(OH)
As PararammelsbergiteNiAs2
As PaxiteCuAs2
As PharmacoliteCa(HAsO4) · 2H2O
As PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2O
As RammelsbergiteNiAs2
As RauenthaliteCa3(AsO4)2 · 10H2O
As SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2O
As SkutteruditeCoAs3
As TyroliteCa2Cu9(AsO4)4(CO3)(OH)8 · 11H2O
As VladimiriteCa4(AsO4)2(AsO3OH) · 4H2O
As WeiliteCa(HAsO4)
As JeankempiteCa5(AsO4)2(HAsO4)2 · 7H2O
MoMolybdenum
Mo KamiokiteFe2Mo3O8
AgSilver
Ag SilverAg

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Mohawk_Mining_Company
Wikidata ID:Q14716232

Localities in this Region

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

 
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