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Mayflower Old Colony Mine, Centennial Heights, Houghton Co., Michigan, USAi
Regional Level Types
Mayflower Old Colony MineMine
Centennial Heights- not defined -
Houghton Co.County

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Latitude & Longitude (WGS84):
47° 15' 24'' North , 88° 23' 40'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
Copper City187 (2017)3.0km
Laurium1,941 (2017)4.2km
Calumet703 (2017)4.6km
Ahmeek146 (2017)4.7km
Lake Linden989 (2017)7.0km

Commodities (Major) - Copper; (Minor) - Silver
Deposit Type: Lode
Development Status: Past Producer
Deposit Model: 96: Native Cu
Host Rock Unit: Kearsarge Amygdaloid, Portage Lake Volcanics
Host Rock: Basalt

An underground copper mine consisting of five shafts located near Laurium. This mine was the result of the merger of the Mayflower and Old Colony Mining Companies in 1911. Both companies organized in 1898 and are located adjacent to each other. Both companies worked the same amygdaloid lode (some said this was the Isle Royal Lode, but geologic studies doubt this). This property is located very close to the Keweenaw Fault, the major structural feature of the Keweenaw Peninsula. Reports from both companies state the rock was highly fractured and in some cases, sandstone was encountered. Another fault, the Mayflower, was also discovered on the property. According to company reports for the combined venture, these faults made it very difficult to consistently follow the ore lodes. Another shaft was sunk in 1919 to work the Mayflower Lode. By 1920, most work was concentrated on crosscuts and by 1926, the company was focusing on a conglomerate in search of copper. The last company report known is from 1930; it is assumed the company closed sometime after this time. Today, there is a rock pile from the Mayflower operations that exists, but it lies on private property and permission must be obtained before entering. Local collectors note that copper and chalcocite can be found on the piles.

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

5 valid minerals.

Rock Types Recorded

Note: 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:

Formula: CaCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Formula: Cu
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Formula: CaB(SiO4)(OH)
Reference: Heinrich and Robinson, 2004, Mineralogy of Michigan
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'K Feldspar'
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Formula: SiO2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.


List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Group 4 - Oxides and Hydroxides
Group 5 - Nitrates and Carbonates
Group 9 - Silicates
Unclassified Minerals, Rocks, etc.
'K Feldspar'-

List of minerals arranged by Dana 8th Edition classification

Metals, other than the Platinum Group
Group 54 - NESOSILICATES Borosilicates and Some Beryllosilicates
Borosilicates and Some Beryllosilicates with B in [4] coordination
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)
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Unclassified Minerals, Mixtures, etc.
'K Feldspar'-

List of minerals for each chemical element

H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H DatoliteCaB(SiO4)(OH)
B DatoliteCaB(SiO4)(OH)
C CalciteCaCO3
O QuartzSiO2
O CalciteCaCO3
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O DatoliteCaB(SiO4)(OH)
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si QuartzSiO2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si DatoliteCaB(SiO4)(OH)
Ca CalciteCaCO3
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca DatoliteCaB(SiO4)(OH)
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Cu CopperCu


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Robinson, G.W. (2004) Mineralogy of Michigan by E.W. Heinrich (2nd edition). A.E. Seaman Mineral Museum, Michigan Technological University, Houghton, Michigan, 252 pages.
The Copper Country Rock & Mineral Club (2001) Red Gold and Tarnished Silver, 2nd Ed. 44 pages.
Stevens, H.J. (1902) The Copper Handbook, Vol 2. Mining Gazette Press, Houghton, Michigan. 494 pages.
Butler, B.S., Burbank, W.S. (1929) The Copper Deposits of Michigan. U.S. Geological Survey. Professional Paper 144. 238 pages.
Kaminski-Hamka, T. (2011) Copper Mines of Houghton County, Michigan. Copperlady Press. 120 pages.
DeGood, L. (2011) Michigan Copper Mining Stocks and Bonds. Self-Published. 401 pages.
White, W.S., Cornwall, H.R., Swanson, R.W. (1953) Bedrock Geology of the Ahmeek Quadrangle, Michigan. United States Geological Survey Map GQ-27, scale 1:24,000.

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

This page contains all mineral locality references listed on 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 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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