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Ridge Mine, Mass Consolidated Mine, Mass City, Ontonagon Co., Michigan, USAi
Regional Level Types
Ridge MineMine
Mass Consolidated MineMine
Mass CityCity
Ontonagon Co.County
MichiganState
USACountry

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Key
Latitude & Longitude (WGS84):
46° 46' 0'' North , 89° 5' 50'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Ontonagon1,324 (2017)20.2km
White Pine474 (2017)37.1km
South Range746 (2017)48.2km


An underground copper mine consisting of one shaft and one adit near Mass City, MI. The Ridge Mining Co. organzied in 1850 and worked until 1855, when it was leased by tributers until 1863. In 1863 the company was reorganized and leased the mine ontribute until 1896, when the land title was lost due to unpaid taxes. The mine was absorbed by Mass in 1899. The mine produced approx. 5.5 million lbs. of refined copper. The Ridge Mine was exceptionally rich in silver, and some nice silver specimens can still be found today, as well as copper and copper crystals.

Regions containing this locality

North America PlateTectonic Plate
Keweenaw Peninsula, Michigan, USAPeninsula

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


6 valid minerals.

Detailed Mineral List:

Calcite
Formula: CaCO3
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Copper
Formula: Cu
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson; Rosemeyer, T. 2011 New from the Keweenaw: Part 4 - Recent Mineral Finds in Michigan's Copper Country. Rocks & Minerals 86:205-227
Datolite
Formula: CaB(SiO4)(OH)
Reference: Mineralogy of Michigan, 2004; Rosemeyer, T. 2011 New from the Keweenaw: Part 4 - Recent Mineral Finds in Michigan's Copper Country. Rocks & Minerals 86:205-227
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Yalmer Primeau Collection
'K Feldspar'
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson
Quartz
Formula: SiO2
Reference: Paul Brandes field observation ; Yalmer Primeau Collection
Silver
Formula: Ag
Reference: Mineralogy of Michigan (2004) Heinrich & Robinson

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
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 9 - Silicates
Datolite9.AJ.20CaB(SiO4)(OH)
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Unclassified Minerals, Rocks, etc.
'K Feldspar'-
'var: Adularia'-KAlSi3O8

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 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
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)
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'K Feldspar'-
'var: Adularia'-KAlSi3O8

List of minerals for each chemical element

HHydrogen
H DatoliteCaB(SiO4)(OH)
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
BBoron
B DatoliteCaB(SiO4)(OH)
CCarbon
C CalciteCaCO3
OOxygen
O QuartzSiO2
O CalciteCaCO3
O K Feldspar (var: Adularia)KAlSi3O8
O DatoliteCaB(SiO4)(OH)
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
AlAluminium
Al K Feldspar (var: Adularia)KAlSi3O8
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
SiSilicon
Si QuartzSiO2
Si K Feldspar (var: Adularia)KAlSi3O8
Si DatoliteCaB(SiO4)(OH)
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
KPotassium
K K Feldspar (var: Adularia)KAlSi3O8
CaCalcium
Ca CalciteCaCO3
Ca DatoliteCaB(SiO4)(OH)
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
FeIron
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
CuCopper
Cu CopperCu
AgSilver
Ag SilverAg

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Butler, B.S., and Burbank, W.S., 1929, The Copper Deposits of Michigan. U.S. Geological Survey. Professional Paper 144. 238 pp.
The Copper Country Rock & Mineral Club, 2001, Red Gold and Tarnished Silver, 2nd Ed., 44 pp.


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