Adventure mine, Greenland, Greenland Township, Ontonagon County, Michigan, USA i
Regional Level Types
Adventure mine Mine
Greenland - not defined -
Greenland Township Township
Ontonagon County County
Michigan State
USA Country

An underground copper mine consisting of three shafts and at least one adit. It is located just south of the town of Greenland, about 15 miles SE of Ontonagon. The Adventure Mining Co. organized in 1850. In 1858 it purchased the Merchants Co. property. In 1870 the company was sold and reorganized under the same name. In 1898, the company was sold again and reorganized under the Adventure Consolidated Copper Co. This consolidation included the Adventure, Hilton, and Knowlton mines. The company suspended all operation in October of 1917. The mine produced approx. 11 million lbs. of refined copper. The mine is currently open as a tourist attraction, and tours are given underground during the summer months. Minerals that can be found here include copper, silver, and quartz.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

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

ⓘ Copper

Mineral List

13 valid minerals.

Detailed Mineral List:

ⓘ Calcite

Formula: CaCO₃

References:

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.

Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 112. Rosemeyer, T. (1990) Through the Scope: Microminerals of the Caledonia Mine Ontonagon County, Michigan. Rocks & Minerals: 65(3): 240.

ⓘ 'Chlorite Group'

References:

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

✪ Copper

Formula: Cu

Habit: Wires to several cm

Colour: red brown

Fluorescence: none

Description: The wires were found in 1980

References:

ⓘ Cuprite

Formula: Cu₂O

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)

References:

ⓘ Epidote

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

References:

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.

Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 112 Rosemeyer, T. (1990) Through the Scope: Microminerals of the Caledonia Mine Ontonagon County, Michigan. Rocks & Minerals: 65(3): 240.

ⓘ 'K Feldspar'

References:

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

ⓘ 'K Feldspar var. Adularia'

Formula: KAlSi₃O₈

References:

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

ⓘ Laumontite

Formula: CaAl₂Si₄O₁₂ · 4H₂O

References:

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

ⓘ Microcline

Formula: K(AlSi₃O₈)

References:

ⓘ Prehnite

Formula: Ca₂Al₂Si₃O₁₀(OH)₂

References:

see photos

ⓘ Pumpellyite-(Mg)

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

References:

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

ⓘ Quartz

Formula: SiO₂

References:

ⓘ Saponite

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

References:

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

ⓘ Silver

Formula: Ag

References:

ⓘ Tenorite

Formula: CuO

References:

Paul T. Brandes

Gallery:

CaCO₃ⓘ Calcite

Cuⓘ Copper

KAlSi₃O₈ⓘ 'K Feldspar var. Adularia'

Agⓘ Silver

CuOⓘ Tenorite

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Copper	1.AA.05	Cu
ⓘ	Silver	1.AA.05	Ag
Group 4 - Oxides and Hydroxides
ⓘ	Cuprite	4.AA.10	Cu₂O
ⓘ	Tenorite	4.AB.10	CuO
ⓘ	Quartz	4.DA.05	SiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
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(Si₂O₇)(SiO₄)(OH)₂ · H₂O
ⓘ	Prehnite	9.DP.20	Ca₂Al₂Si₃O₁₀(OH)₂
ⓘ	Saponite	9.EC.45	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
ⓘ	Microcline	9.FA.30	K(AlSi₃O₈)
ⓘ	Laumontite	9.GB.10	CaAl₂Si₄O₁₂ · 4H₂O
Unclassified
ⓘ	'K Feldspar var. Adularia'	-	KAlSi₃O₈
ⓘ	'Chlorite Group'	-
ⓘ	'K Feldspar'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Datolite	CaB(SiO₄)(OH)
H	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
H	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
H	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
H	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
H	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
B	Boron
B	ⓘ Datolite	CaB(SiO₄)(OH)
C	Carbon
C	ⓘ Calcite	CaCO₃
O	Oxygen
O	ⓘ K Feldspar var. Adularia	KAlSi₃O₈
O	ⓘ Calcite	CaCO₃
O	ⓘ Cuprite	Cu₂O
O	ⓘ Datolite	CaB(SiO₄)(OH)
O	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
O	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
O	ⓘ Microcline	K(AlSi₃O₈)
O	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
O	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
O	ⓘ Quartz	SiO₂
O	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
O	ⓘ Tenorite	CuO
Mg	Magnesium
Mg	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
Mg	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Al	Aluminium
Al	ⓘ K Feldspar var. Adularia	KAlSi₃O₈
Al	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Al	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Al	ⓘ Microcline	K(AlSi₃O₈)
Al	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Al	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
Al	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Si	Silicon
Si	ⓘ K Feldspar var. Adularia	KAlSi₃O₈
Si	ⓘ Datolite	CaB(SiO₄)(OH)
Si	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Si	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Si	ⓘ Microcline	K(AlSi₃O₈)
Si	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Si	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
Si	ⓘ Quartz	SiO₂
Si	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
K	Potassium
K	ⓘ K Feldspar var. Adularia	KAlSi₃O₈
K	ⓘ Microcline	K(AlSi₃O₈)
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Datolite	CaB(SiO₄)(OH)
Ca	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Ca	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Ca	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Ca	ⓘ Pumpellyite-(Mg)	Ca₂MgAl₂(Si₂O₇)(SiO₄)(OH)₂ · H₂O
Ca	ⓘ Saponite	Ca_0.25(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Fe	Iron
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	ⓘ Cuprite	Cu₂O
Cu	ⓘ Copper	Cu
Cu	ⓘ Tenorite	CuO
Ag	Silver
Ag	ⓘ Silver	Ag

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

Mid-continent DomainDomain

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.

References

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., Burbank, W.S. (1929) The Copper Deposits of Michigan. U.S. Geological Survey. Professional Paper 144. 238 pages.

Rocks & Minerals (1983) 58: 112

Rocks & Minerals (1990) 65: 240

Kaminski-Hamka, T. (2011) The Copper Mines of Ontonagon County, Michigan. Copperlady Press. 154 pages.

Quick NavTop Commodities Mineral List Other Regions References