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Mandan, Grant Township, Keweenaw County, Michigan, USA i
Regional Level Types
Mandan Unincorporated Community
Grant Township Township
Keweenaw County County
Michigan State
USA Country

Regional Level Types
Mandan	Unincorporated Community
Grant Township	Township
Keweenaw County	County
Michigan	State
USA	Country

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Abandoned House in Mandan

Mandan, Grant Township, Keweenaw County, Michigan, USA

Mandan Esker

Mandan Esker, Mandan, Grant Township, Keweenaw County, Michigan, USA

Mandan Gravel Pit

Mandan Sand/Gravel pit, Mandan, Grant Township, Keweenaw County, Michigan, USA

Abandoned House in Mandan

Mandan, Grant Township, Keweenaw County, Michigan, USA

Mandan Esker

Mandan Esker, Mandan, Grant Township, Keweenaw County, Michigan, USA

Mandan Gravel Pit

Mandan Sand/Gravel pit, Mandan, Grant Township, Keweenaw County, Michigan, USA

Abandoned House in Mandan

Mandan, Grant Township, Keweenaw County, Michigan, USA

Mandan Esker

Mandan Esker, Mandan, Grant Township, Keweenaw County, Michigan, USA

Latitude & Longitude (WGS84):

47° 25' 29'' North , 88° 0' 56'' West

Latitude & Longitude (decimal):

47.42500,-88.01556

GRN:

N32W44

Type:

Unincorporated Community

Köppen climate type:

Dfb : Warm-summer humid continental climate

Mindat Locality ID:

34392

Long-form identifier:

mindat:1:2:34392:6

GUID (UUID V4):

An unincorporated community and ghost town located along U.S. Route 41. The area was home to the Mandan and Medora copper mines, established in 1864 and operated intermittently until they were abandoned in 1909.

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.

ⓘ Copper

ⓘ Sand and Gravel

Mineral List

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

16 valid minerals.

Rock Types Recorded

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

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ Basalt

ⓘ 'Jasper'

Detailed Mineral List:

ⓘ Babingtonite

Formula: Ca₂Fe²⁺Fe³⁺Si₅O₁₄(OH)

Locality: Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

References:

Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.

ⓘ Calcite

Formula: CaCO₃

Localities:

Mandan Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA
Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA
Resolute Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

ⓘ Celadonite

Formula: K(MgFe³⁺◻)(Si₄O₁₀)(OH)₂

Locality: Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

References:

Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.

ⓘ 'Chlorite Group'

Locality: Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

Description: Certainly misidentified.

References:

Morris, Tom (1983) Michigan Mineralogy. A locality Index. Rocks & Minerals, 58 (3). 107-113 doi:10.1080/00357529.1983.11767128p.111

ⓘ Chrysocolla

Formula: Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1

Locality: Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

References:

Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.

ⓘ Clinochlore

Formula: Mg₅Al(AlSi₃O₁₀)(OH)₈

Locality: Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

References:

Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.

ⓘ Datolite

Formula: CaB(SiO₄)(OH)

Localities:

Mandan Sand/Gravel pit, Mandan, Grant Township, Keweenaw County, Michigan, USA
Mandan Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA
Resolute Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA
Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

ⓘ Epidote

Formula: (CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)

Locality: Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

References:

Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.

ⓘ Malachite

Formula: Cu₂(CO₃)(OH)₂

Locality: Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

References:

Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.

ⓘ Native Copper

Formula: Cu

Localities:

ⓘ Native Silver

Formula: Ag

Locality: Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

References:

Morris, Tom (1983) Michigan Mineralogy. A locality Index. Rocks & Minerals, 58 (3). 107-113 doi:10.1080/00357529.1983.11767128p.111

ⓘ Natrolite

Formula: Na₂Al₂Si₃O₁₀ · 2H₂O

Locality: Mandan Sand/Gravel pit, Mandan, Grant Township, Keweenaw County, Michigan, USA

References:

Yalmer Primeau collection

ⓘ Prehnite

Formula: Ca₂Al₂Si₃O₁₀(OH)₂

Localities:

ⓘ Pumpellyite-(Mg)

Formula: Ca₂MgAl₂[Si₂O₆OH][SiO₄](OH)₂(OH)

Locality: Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

References:

Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.

ⓘ Pumpellyite-(Mg) var. Chlorastrolite

Formula: Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O

Locality: Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

References:

Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.

ⓘ 'Pumpellyite Subgroup'

Formula: Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A

Locality: Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

References:

Morris, Tom (1983) Michigan Mineralogy. A locality Index. Rocks & Minerals, 58 (3). 107-113 doi:10.1080/00357529.1983.11767128p.111

ⓘ Quartz

Formula: SiO₂

Localities:

Mandan Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA
Resolute Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA
Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

ⓘ Quartz var. Milky Quartz

Formula: SiO₂

Locality: Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

References:

Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.

ⓘ Saponite

Formula: Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O

Locality: Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

References:

Morris, Tom (1983) Michigan Mineralogy. A locality Index. Rocks & Minerals, 58 (3). 107-113 doi:10.1080/00357529.1983.11767128p.111

ⓘ Tenorite

Formula: CuO

Locality: Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

References:

Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.

Gallery:

CaCO₃ⓘ Calcite

Calcite, etc.

Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

Calcite, etc.

Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

Calcite, etc.

Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

Agⓘ Native Silver

Native Silver, etc.

Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

Native Silver, etc.

Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

Native Silver, etc.

Medora Mine, Mandan, Grant Township, Keweenaw County, Michigan, USA

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Native Copper	1.AA.05	Cu
ⓘ	Native Silver	1.AA.05	Ag
Group 4 - Oxides and Hydroxides
ⓘ	Tenorite	4.AB.10	CuO
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	var. Milky Quartz	4.DA.05	SiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Malachite	5.BA.10	Cu₂(CO₃)(OH)₂
Group 9 - Silicates
ⓘ	Datolite	9.AJ.20	CaB(SiO₄)(OH)
ⓘ	Epidote	9.BG.05a	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
ⓘ	Pumpellyite-(Mg)	9.BG.20	Ca₂MgAl₂[Si₂O₆OH][SiO₄](OH)₂(OH)
ⓘ	var. Chlorastrolite	9.BG.20	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
ⓘ	Babingtonite	9.DK.05	Ca₂Fe²⁺Fe³⁺Si₅O₁₄(OH)
ⓘ	Prehnite	9.DP.20	Ca₂Al₂Si₃O₁₀(OH)₂
ⓘ	Celadonite	9.EC.15	K(MgFe³⁺◻)(Si₄O₁₀)(OH)₂
ⓘ	Saponite	9.EC.45	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
ⓘ	Clinochlore	9.EC.55	Mg₅Al(AlSi₃O₁₀)(OH)₈
ⓘ	Chrysocolla	9.ED.20	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
ⓘ	Natrolite	9.GA.05	Na₂Al₂Si₃O₁₀ · 2H₂O
Unclassified
ⓘ	'Chlorite Group'	-
ⓘ	'Pumpellyite Subgroup'	-	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Babingtonite	Ca₂Fe²⁺Fe³⁺Si₅O₁₄(OH)
H	ⓘ Celadonite	K(MgFe³⁺◻)(Si₄O₁₀)(OH)₂
H	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
H	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
H	ⓘ Datolite	CaB(SiO₄)(OH)
H	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
H	ⓘ Malachite	Cu₂(CO₃)(OH)₂
H	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
H	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
H	ⓘ Pumpellyite Subgroup	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A
H	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂[Si₂O₆OH][SiO₄](OH)₂(OH)
H	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
H	ⓘ Pumpellyite-(Mg) var. Chlorastrolite	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
B	Boron
B	ⓘ Datolite	CaB(SiO₄)(OH)
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Malachite	Cu₂(CO₃)(OH)₂
O	Oxygen
O	ⓘ Babingtonite	Ca₂Fe²⁺Fe³⁺Si₅O₁₄(OH)
O	ⓘ Calcite	CaCO₃
O	ⓘ Celadonite	K(MgFe³⁺◻)(Si₄O₁₀)(OH)₂
O	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
O	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
O	ⓘ Datolite	CaB(SiO₄)(OH)
O	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
O	ⓘ Malachite	Cu₂(CO₃)(OH)₂
O	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
O	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
O	ⓘ Pumpellyite Subgroup	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A
O	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂[Si₂O₆OH][SiO₄](OH)₂(OH)
O	ⓘ Quartz	SiO₂
O	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
O	ⓘ Tenorite	CuO
O	ⓘ Quartz var. Milky Quartz	SiO₂
O	ⓘ Pumpellyite-(Mg) var. Chlorastrolite	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
Na	Sodium
Na	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
Mg	Magnesium
Mg	ⓘ Celadonite	K(MgFe³⁺◻)(Si₄O₁₀)(OH)₂
Mg	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
Mg	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂[Si₂O₆OH][SiO₄](OH)₂(OH)
Mg	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Mg	ⓘ Pumpellyite-(Mg) var. Chlorastrolite	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
Al	Aluminium
Al	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
Al	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
Al	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Al	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
Al	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Al	ⓘ Pumpellyite Subgroup	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A
Al	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂[Si₂O₆OH][SiO₄](OH)₂(OH)
Al	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Al	ⓘ Pumpellyite-(Mg) var. Chlorastrolite	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
Si	Silicon
Si	ⓘ Babingtonite	Ca₂Fe²⁺Fe³⁺Si₅O₁₄(OH)
Si	ⓘ Celadonite	K(MgFe³⁺◻)(Si₄O₁₀)(OH)₂
Si	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
Si	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
Si	ⓘ Datolite	CaB(SiO₄)(OH)
Si	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Si	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
Si	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Si	ⓘ Pumpellyite Subgroup	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A
Si	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂[Si₂O₆OH][SiO₄](OH)₂(OH)
Si	ⓘ Quartz	SiO₂
Si	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Si	ⓘ Quartz var. Milky Quartz	SiO₂
Si	ⓘ Pumpellyite-(Mg) var. Chlorastrolite	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
K	Potassium
K	ⓘ Celadonite	K(MgFe³⁺◻)(Si₄O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Babingtonite	Ca₂Fe²⁺Fe³⁺Si₅O₁₄(OH)
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Datolite	CaB(SiO₄)(OH)
Ca	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Ca	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Ca	ⓘ Pumpellyite Subgroup	Ca₂XAl₂[Si₂O₆(OH)][SiO₄](OH)₂A
Ca	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂[Si₂O₆OH][SiO₄](OH)₂(OH)
Ca	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Ca	ⓘ Pumpellyite-(Mg) var. Chlorastrolite	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
Fe	Iron
Fe	ⓘ Babingtonite	Ca₂Fe²⁺Fe³⁺Si₅O₁₄(OH)
Fe	ⓘ Celadonite	K(MgFe³⁺◻)(Si₄O₁₀)(OH)₂
Fe	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Fe	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Cu	Copper
Cu	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
Cu	ⓘ Native Copper	Cu
Cu	ⓘ Malachite	Cu₂(CO₃)(OH)₂
Cu	ⓘ Tenorite	CuO
Ag	Silver
Ag	ⓘ Native Silver	Ag

Other Databases

Wikipedia:	https://en.wikipedia.org/wiki/Mandan,_Michigan
Wikidata ID:	Q6747799
GeoNames ID:	5000601

Localities in this Region

USA

Michigan
- Keweenaw County
  - Grant Township
    - Mandan

Other Regions, Features and Areas containing this locality

North AmericaContinent

North America PlateTectonic Plate

Mid-continent DomainDomain
Mid-continent RiftNarrow Rift

USA

Michigan
- Keweenaw PeninsulaPeninsula
Midcontinent RiftGeologic Province

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.

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Mandan, Grant Township, Keweenaw County, Michigan, USAiRegional Level TypesMandanUnincorporated Community Grant TownshipTownship Keweenaw CountyCounty MichiganState USACountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

Select Mineral List Type

Commodity List

Mineral List

Rock Types Recorded

Select Rock List Type

Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Other Databases

Localities in this Region

Other Regions, Features and Areas containing this locality

Mandan, Grant Township, Keweenaw County, Michigan, USA i
Regional Level Types
Mandan Unincorporated Community
Grant Township Township
Keweenaw County County
Michigan State
USA Country