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Medora Mine, Mandan, Keweenaw Co., Michigan, USAi
Regional Level Types
Medora MineMine (Abandoned)
Mandan- not defined -
Keweenaw Co.County
MichiganState
USACountry

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Key
Latitude & Longitude (WGS84):
47° 25' 37'' North , 88° 0' 29'' West
Latitude & Longitude (decimal):
Locality type:
Mine (Abandoned) - last checked 2020
Nearest Settlements:
PlacePopulationDistance
Copper Harbor108 (2017)10.1km
Ahmeek146 (2017)32.5km
Copper City187 (2017)32.7km
Laurium1,941 (2017)39.0km
Calumet703 (2017)39.1km


An underground copper mine consisting of one shaft located near Mandan. The Medora Mining Company was organized in 1848 east of Mandan. Not much else is known of the mine other than it operated until about 1866 when it closed due to monetary issues. The mine is easily accessible and many minerals can be found on the pile, including copper, silver, pumpellyite, and prehnite.

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


15 valid minerals. 1 erroneous literature entry.

Detailed Mineral List:

Babingtonite
Formula: Ca2(Fe,Mn)FeSi5O14(OH)
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Calcite
Formula: CaCO3
Reference: Rocks & Min.: 58:111.
Celadonite
Formula: K(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
'Chlorite Group'
Description: Certainly misidentified.
Reference: Rocks & Min.: 58:111.
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Copper
Formula: Cu
Reference: Rocks & Min.: 58:111.
Datolite
Formula: CaB(SiO4)(OH)
Reference: Paul Brandes
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: E. W. Heinrich, G. W. Robinson, 2oo1, Mineralogy of Michigan
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Reference: Rocks & Min.: 58:111.
'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
Quartz
Formula: SiO2
Reference: Paul Brandes
Quartz var. Jasper
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Quartz var. Milky Quartz
Formula: SiO2
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Saponite
Formula: Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Reference: Rocks & Min.: 58:111.
Silver
Formula: Ag
Reference: Rocks & Min.: 58:111.
Tenorite
Formula: CuO
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Copper1.AA.05Cu
Silver1.AA.05Ag
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
var. Jasper4.DA.05SiO2
var. Milky Quartz4.DA.05SiO2
Tenorite4.AB.10CuO
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Group 9 - Silicates
Babingtonite9.DK.05Ca2(Fe,Mn)FeSi5O14(OH)
Celadonite9.EC.15K(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
Datolite9.AJ.20CaB(SiO4)(OH)
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Pumpellyite-(Mg)9.BG.20Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH)
var. Chlorastrolite9.BG.20Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Saponite9.EC.45Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Unclassified Minerals, Rocks, etc.
'Chlorite Group' ?-
'Pumpellyite'-

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
AX
Tenorite4.2.3.1CuO
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
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)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=5
Babingtonite65.4.1.2Ca2(Fe,Mn)FeSi5O14(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Celadonite71.2.2a.6K(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Sheets of 6-membered rings with 2:1 clays
Saponite71.3.1b.2Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Clinochlore71.4.1.4Mg5Al(AlSi3O10)(OH)8
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
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Chlorite Group' ?-
'Pumpellyite'-
Pumpellyite-(Mg)
var. Chlorastrolite
-Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Quartz
var. Jasper
-SiO2
var. Milky Quartz-SiO2

List of minerals for each chemical element

HHydrogen
H PrehniteCa2Al2Si3O10(OH)2
H SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
H BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
H CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
H ClinochloreMg5Al(AlSi3O10)(OH)8
H Pumpellyite-(Mg) var. ChlorastroliteCa2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
H MalachiteCu2(CO3)(OH)2
H DatoliteCaB(SiO4)(OH)
H Pumpellyite-(Mg)Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH)
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
BBoron
B DatoliteCaB(SiO4)(OH)
CCarbon
C CalciteCaCO3
C MalachiteCu2(CO3)(OH)2
OOxygen
O CalciteCaCO3
O PrehniteCa2Al2Si3O10(OH)2
O SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
O BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
O CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
O ClinochloreMg5Al(AlSi3O10)(OH)8
O Pumpellyite-(Mg) var. ChlorastroliteCa2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
O Quartz var. Milky QuartzSiO2
O MalachiteCu2(CO3)(OH)2
O TenoriteCuO
O DatoliteCaB(SiO4)(OH)
O QuartzSiO2
O Pumpellyite-(Mg)Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH)
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
MgMagnesium
Mg SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Mg CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Mg ClinochloreMg5Al(AlSi3O10)(OH)8
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 SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Al ClinochloreMg5Al(AlSi3O10)(OH)8
Al Pumpellyite-(Mg) var. ChlorastroliteCa2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Al Pumpellyite-(Mg)Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH)
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
SiSilicon
Si PrehniteCa2Al2Si3O10(OH)2
Si SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Si BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Si CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Si ClinochloreMg5Al(AlSi3O10)(OH)8
Si Pumpellyite-(Mg) var. ChlorastroliteCa2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Si Quartz var. Milky QuartzSiO2
Si DatoliteCaB(SiO4)(OH)
Si QuartzSiO2
Si Pumpellyite-(Mg)Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH)
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
KPotassium
K CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
CaCalcium
Ca CalciteCaCO3
Ca PrehniteCa2Al2Si3O10(OH)2
Ca SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Ca BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Ca Pumpellyite-(Mg) var. ChlorastroliteCa2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Ca DatoliteCaB(SiO4)(OH)
Ca Pumpellyite-(Mg)Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH)
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
MnManganese
Mn BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
FeIron
Fe SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Fe BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Fe CeladoniteK(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
CuCopper
Cu CopperCu
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Cu MalachiteCu2(CO3)(OH)2
Cu TenoriteCuO
AgSilver
Ag SilverAg

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Rocks & Minerals (1983) 58: 108.
The Copper Country Rock & Mineral Club (2001) Red Gold and Tarnished Silver, 2nd Ed. 44 pages.
DeGood, L. (2011) Michigan Copper Mining Stocks and Bonds. 401 pages.
Kaminski-Hamka, T. (2011) The Copper Mines of Keweenaw County, Michigan. Copperlady Press. 150 pages.

Other Regions, Features and Areas containing this locality

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