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Ohio Mines (Imperial Mine; Webster Mine), Imperial Heights, Baraga Co., Michigan, USAi
Regional Level Types
Ohio Mines (Imperial Mine; Webster Mine)Group of Mines
Imperial Heights- not defined -
Baraga Co.County
MichiganState
USACountry

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Key
Latitude & Longitude (WGS84):
46° 32' 16'' North , 88° 10' 16'' West
Latitude & Longitude (decimal):
Locality type:
Group of Mines
Nearest Settlements:
PlacePopulationDistance
Michigamme271 (2017)4.7km
Republic570 (2017)20.9km
L'Anse1,934 (2017)32.5km
Zeba480 (2017)34.8km
Baraga1,996 (2017)36.1km


A group of two mines located at Imperial Heights near Michigamme. The mines worked the Proterozoic Bijiki Iron-formation unit of the Michigamme Formation.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


16 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and 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:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Analcime
Formula: Na(AlSi2O6) · H2O
Reference: Personal Collection - Bill Morgenstern
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Reference: Rocks & Min.: 58:108.
Calcite
Formula: CaCO3
Reference: Rocks & Min.: 58:108.
Chalcopyrite
Formula: CuFeS2
Reference: Rocks & Min.: 58:108.
Dolomite
Formula: CaMg(CO3)2
Reference: Rocks & Min.: 58:108.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Personal Collection - Bill Morgenstern
Goethite
Formula: α-Fe3+O(OH)
Reference: Rocks & Min.: 58:108.
Graphite
Formula: C
Reference: Rocks & Min.: 58:108.
Grunerite
Formula: ☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2
Reference: Rocks & Min.: 58:108.
Gypsum
Formula: CaSO4 · 2H2O
Reference: Rocks & Min.: 58:108.
Hematite
Formula: Fe2O3
Reference: Rocks & Min.: 58:108.
'Hornblende'
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Marcasite
Formula: FeS2
Reference: Rocks & Min.: 58:108.
'Mica Group'
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Palygorskite
Formula: (Mg,Al)5(Si,Al)8O20(OH)2 · 8H2O
Reference: Rocks & Min.: 58:108.
Pyrite
Formula: FeS2
Reference: Rocks & Min.: 58:108.
Quartz
Formula: SiO2
Reference: Rocks & Min.: 58:108.
Quartz var: Amethyst
Formula: SiO2
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Sphalerite
Formula: ZnS
Reference: Rocks & Min.: 58:108.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Graphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Marcasite2.EB.10aFeS2
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Hematite4.CB.05Fe2O3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Gypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Analcime9.GB.05Na(AlSi2O6) · H2O
Grunerite9.DE.05☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2
Palygorskite9.EE.20(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2O
Unclassified Minerals, Rocks, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Garnet Group'-X3Z2(SiO4)3
'Hornblende'-
'Limonite'-(Fe,O,OH,H2O)
'Mica Group'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Semi-metals and non-metals
Graphite1.3.6.2C
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Marcasite2.12.2.1FeS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Palygorskite74.3.1a.1(Mg,Al)5(Si,Al)8O20(OH)2 · 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
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Garnet Group'-X3Z2(SiO4)3
Grunerite-☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2
'Hornblende'-
'Limonite'-(Fe,O,OH,H2O)
'Mica Group'-
Quartz
var: Amethyst
-SiO2

List of minerals for each chemical element

HHydrogen
H ApatiteCa5(PO4)3(Cl/F/OH)
H Goethiteα-Fe3+O(OH)
H Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
H GypsumCaSO4 · 2H2O
H Palygorskite(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2O
H AnalcimeNa(AlSi2O6) · H2O
H Limonite(Fe,O,OH,H2O)
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
CCarbon
C CalciteCaCO3
C DolomiteCaMg(CO3)2
C GraphiteC
OOxygen
O ApatiteCa5(PO4)3(Cl/F/OH)
O CalciteCaCO3
O DolomiteCaMg(CO3)2
O Goethiteα-Fe3+O(OH)
O Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
O GypsumCaSO4 · 2H2O
O HematiteFe2O3
O Palygorskite(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2O
O QuartzSiO2
O AnalcimeNa(AlSi2O6) · H2O
O Garnet GroupX3Z2(SiO4)3
O Limonite(Fe,O,OH,H2O)
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O MagnetiteFe2+Fe23+O4
O Quartz (var: Amethyst)SiO2
FFluorine
F ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Na AnalcimeNa(AlSi2O6) · H2O
MgMagnesium
Mg DolomiteCaMg(CO3)2
Mg Palygorskite(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2O
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
AlAluminium
Al Palygorskite(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2O
Al AnalcimeNa(AlSi2O6) · H2O
SiSilicon
Si Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
Si Palygorskite(Mg,Al)5(Si,Al)8O20(OH)2 · 8H2O
Si QuartzSiO2
Si AnalcimeNa(AlSi2O6) · H2O
Si Garnet GroupX3Z2(SiO4)3
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si Quartz (var: Amethyst)SiO2
PPhosphorus
P ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
S ChalcopyriteCuFeS2
S GypsumCaSO4 · 2H2O
S MarcasiteFeS2
S PyriteFeS2
S SphaleriteZnS
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
CaCalcium
Ca ApatiteCa5(PO4)3(Cl/F/OH)
Ca CalciteCaCO3
Ca DolomiteCaMg(CO3)2
Ca GypsumCaSO4 · 2H2O
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
FeIron
Fe ChalcopyriteCuFeS2
Fe Goethiteα-Fe3+O(OH)
Fe Grunerite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
Fe HematiteFe2O3
Fe MarcasiteFeS2
Fe PyriteFeS2
Fe Limonite(Fe,O,OH,H2O)
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe MagnetiteFe2+Fe23+O4
CuCopper
Cu ChalcopyriteCuFeS2
ZnZinc
Zn SphaleriteZnS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Rocks & Minerals (1983): 58: 108.
Cannon, W.F. (1999) Digital Geologic Map of the Penokean Continental Margin, Northern Michigan and Wisconsin, U.S. Geological Survey Open-File Report 99-547, Reston, VA.

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

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