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Central Mine, Central, Keweenaw Co., Michigan, USAi
Regional Level Types
Central MineMine
Central- not defined -
Keweenaw Co.County
MichiganState
USACountry

This page kindly sponsored by Keith A. Peregrine
Key
Latitude & Longitude (WGS84):
47° 24' 30'' North , 88° 11' 55'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Ahmeek146 (2017)19.2km
Copper City187 (2017)19.8km
Copper Harbor108 (2017)24.3km
Calumet703 (2017)26.3km
Laurium1,941 (2017)26.5km


The Central Mine is located on a fissure deposit and consists of 4 shafts and 2 adits. The Central Mining Company was organized in 1854 and has the distinction of being the first mine to turn a profit in its first year of operation. Work continued until 1898 when all operations ceased. It was sold to the Frontenac Copper Company in 1905 and later absorbed by Calumet & Hecla. In its 44 years of operation, the Central produced 51 million lbs. of refined copper and a large amount of silver. This mine is a favorite of collectors for its wide variety of minerals that can be found.

Select Mineral List Type

Standard Detailed Gallery Strunz Dana Chemical Elements

Commodity List

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


Mineral List


20 valid minerals.

Detailed Mineral List:

Analcime
Formula: Na(AlSi2O6) · H2O
Reference: Rocks & Min.:58:111.
Calcite
Formula: CaCO3
Reference: Henwood, W.J. (1871): Transactions of the Royal Geological Society of Cornwall 8(1), 385-489; Rocks & Min.:58:111.
Copper
Formula: Cu
Reference: Henwood, W.J. (1871): Transactions of the Royal Geological Society of Cornwall 8(1), 385-489; Mineralogical Record 23(2); Rocks & Minerals 58, 111; Rocks & Minerals 84, 298-323.
Cuprite
Formula: Cu2O
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Datolite
Formula: CaB(SiO4)(OH)
Reference: [Mineralogical Record - Vol 23 No. 2; Rocks & Min.:58:111.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: RWMW specimen
Fluorapophyllite-(K)
Formula: KCa4(Si8O20)(F,OH) · 8H2O
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Hematite
Formula: Fe2O3
Reference: [Mineralogical Record - Vol 23 No. 2]
Ilmenite
Formula: Fe2+TiO3
Reference: Justin Bank Collection
'K Feldspar'
Reference: Steve Sorrell Collection
'K Feldspar var. Adularia'
Formula: KAlSi3O8
Reference: Steve Sorrell Collection
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Reference: Henwood, W.J. (1871): Transactions of the Royal Geological Society of Cornwall 8(1), 385-489
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Rocks & Min.:58:111.
Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Rocks & Min.:58:111.
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Reference: [Mineralogical Record - Vol 23 No. 2; Rocks & Min.:58:111.; Rocks & Minerals 84:298-323.
'Pumpellyite'
Reference: Rocks & Min.:58:111.
Pumpellyite-(Mg)
Formula: Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH)
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Pumpellyite-(Mg) var. Chlorastrolite
Formula: Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Pumpellyite-(Mn2+)
Formula: Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH)
Reference: George Balogh collection
Quartz
Formula: SiO2
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson; Rocks & Minerals 84:298-323.
Rhodochrosite ?
Formula: MnCO3
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Silver
Formula: Ag
Reference: Rocks & Min.:58:111.; Rocks & Minerals 84:298-323.
'Stilbite subgroup'
Formula: M6-7[Al8-9Si27-28O72] · nH2O
Reference: Rocks & Min.:58:111.
Tenorite
Formula: CuO
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Thomsonite-Ca
Formula: NaCa2[Al5Si5O20] · 6H2O
Reference: Rocks & Min.:58:111.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Copper1.AA.05Cu
Silver1.AA.05Ag
Group 4 - Oxides and Hydroxides
Cuprite4.AA.10Cu2O
Hematite4.CB.05Fe2O3
Ilmenite4.CB.05Fe2+TiO3
Quartz4.DA.05SiO2
Tenorite4.AB.10CuO
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Rhodochrosite ?5.AB.05MnCO3
Group 9 - Silicates
Analcime9.GB.05Na(AlSi2O6) · H2O
Datolite9.AJ.20CaB(SiO4)(OH)
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fluorapophyllite-(K)9.EA.15KCa4(Si8O20)(F,OH) · 8H2O
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Pumpellyite-(Mg)9.BG.20Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH)
var. Chlorastrolite9.BG.20Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Pumpellyite-(Mn2+)9.BG.20Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH)
Thomsonite-Ca9.GA.10NaCa2[Al5Si5O20] · 6H2O
Unclassified Minerals, Rocks, etc.
'K Feldspar'-
'var. Adularia'-KAlSi3O8
'Pumpellyite'-
'Stilbite subgroup'-M6-7[Al8-9Si27-28O72] · nH2O

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
Silver1.1.1.2Ag
Group 4 - SIMPLE OXIDES
A2X
Cuprite4.1.1.1Cu2O
AX
Tenorite4.2.3.1CuO
A2X3
Hematite4.3.1.2Fe2O3
Ilmenite4.3.5.1Fe2+TiO3
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Rhodochrosite ?14.1.1.4MnCO3
Group 54 - NESOSILICATES Borosilicates and Some Beryllosilicates
Borosilicates and Some Beryllosilicates with B in [4] coordination
Datolite54.2.1a.1CaB(SiO4)(OH)
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)
Pumpellyite-(Mg)58.2.2.7Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH)
Pumpellyite-(Mn2+)58.2.2.8Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(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
Group 72 - PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 4-membered rings
Prehnite72.1.3.1Ca2Al2Si3O10(OH)2
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 3-, 4-, or 5-membered rings and 8-membered rings
Fluorapophyllite-(K)72.3.1.1KCa4(Si8O20)(F,OH) · 8H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O
Unclassified Minerals, Mixtures, etc.
'K Feldspar'-
'var. Adularia'-KAlSi3O8
Muscovite
var. Sericite
-KAl2(AlSi3O10)(OH)2
'Pumpellyite'-
Pumpellyite-(Mg)
var. Chlorastrolite
-Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
'Stilbite subgroup'-M6-7[Al8-9Si27-28O72] · nH2O
Thomsonite-Ca-NaCa2[Al5Si5O20] · 6H2O

List of minerals for each chemical element

HHydrogen
H DatoliteCaB(SiO4)(OH)
H PrehniteCa2Al2Si3O10(OH)2
H AnalcimeNa(AlSi2O6) · H2O
H Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
H Stilbite subgroupM6-7[Al8-9Si27-28O72] · nH2O
H Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H NatroliteNa2Al2Si3O10 · 2H2O
H Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
H Pumpellyite-(Mg) var. ChlorastroliteCa2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
H LaumontiteCaAl2Si4O12 · 4H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
H Pumpellyite-(Mg)Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH)
H Pumpellyite-(Mn2+)Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH)
BBoron
B DatoliteCaB(SiO4)(OH)
CCarbon
C CalciteCaCO3
C RhodochrositeMnCO3
OOxygen
O DatoliteCaB(SiO4)(OH)
O HematiteFe2O3
O PrehniteCa2Al2Si3O10(OH)2
O AnalcimeNa(AlSi2O6) · H2O
O CalciteCaCO3
O Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
O Stilbite subgroupM6-7[Al8-9Si27-28O72] · nH2O
O Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
O QuartzSiO2
O TenoriteCuO
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O CupriteCu2O
O NatroliteNa2Al2Si3O10 · 2H2O
O Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
O Pumpellyite-(Mg) var. ChlorastroliteCa2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
O K Feldspar var. AdulariaKAlSi3O8
O LaumontiteCaAl2Si4O12 · 4H2O
O MuscoviteKAl2(AlSi3O10)(OH)2
O Pumpellyite-(Mg)Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH)
O IlmeniteFe2+TiO3
O Pumpellyite-(Mn2+)Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH)
O RhodochrositeMnCO3
FFluorine
F Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
NaSodium
Na AnalcimeNa(AlSi2O6) · H2O
Na Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Na NatroliteNa2Al2Si3O10 · 2H2O
MgMagnesium
Mg Pumpellyite-(Mg) var. ChlorastroliteCa2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Mg Pumpellyite-(Mg)Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH)
AlAluminium
Al PrehniteCa2Al2Si3O10(OH)2
Al AnalcimeNa(AlSi2O6) · H2O
Al Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Al Stilbite subgroupM6-7[Al8-9Si27-28O72] · nH2O
Al Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al NatroliteNa2Al2Si3O10 · 2H2O
Al Pumpellyite-(Mg) var. ChlorastroliteCa2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Al K Feldspar var. AdulariaKAlSi3O8
Al LaumontiteCaAl2Si4O12 · 4H2O
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Pumpellyite-(Mg)Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH)
Al Pumpellyite-(Mn2+)Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH)
SiSilicon
Si DatoliteCaB(SiO4)(OH)
Si PrehniteCa2Al2Si3O10(OH)2
Si AnalcimeNa(AlSi2O6) · H2O
Si Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Si Stilbite subgroupM6-7[Al8-9Si27-28O72] · nH2O
Si Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Si QuartzSiO2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si NatroliteNa2Al2Si3O10 · 2H2O
Si Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Si Pumpellyite-(Mg) var. ChlorastroliteCa2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Si K Feldspar var. AdulariaKAlSi3O8
Si LaumontiteCaAl2Si4O12 · 4H2O
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Pumpellyite-(Mg)Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH)
Si Pumpellyite-(Mn2+)Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH)
KPotassium
K Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
K Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
K K Feldspar var. AdulariaKAlSi3O8
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca DatoliteCaB(SiO4)(OH)
Ca PrehniteCa2Al2Si3O10(OH)2
Ca CalciteCaCO3
Ca Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Ca Pumpellyite-(Mg) var. ChlorastroliteCa2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca Pumpellyite-(Mg)Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH)
Ca Pumpellyite-(Mn2+)Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH)
TiTitanium
Ti IlmeniteFe2+TiO3
MnManganese
Mn Pumpellyite-(Mn2+)Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH)
Mn RhodochrositeMnCO3
FeIron
Fe HematiteFe2O3
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe IlmeniteFe2+TiO3
CuCopper
Cu CopperCu
Cu TenoriteCuO
Cu CupriteCu2O
AgSilver
Ag SilverAg

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Henwood, W.J. (1871) Observations on Metalliferous Deposits: On the Native Copper of Lake Superior. Transactions of the Royal Geological Society of Cornwall 8(1), 385-489.
Butler, B.S., and Burbank, W.S. (1929) The Copper Deposits of Michigan. U.S. Geological Survey. Professional Paper 144. 238 pages.
The Copper Country Rock & Mineral Club (2001) Red Gold and Tarnished Silver, 2nd Ed. 44 pages.

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate
USA

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