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Mabbs Mine, Houghton, Houghton Co., Michigan, USAi
Regional Level Types
Mabbs MineMine
Houghton- not defined -
Houghton Co.County
MichiganState
USACountry

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Key
Latitude & Longitude (WGS84):
47° 6' 41'' North , 88° 33' 6'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Houghton7,970 (2017)1.8km
Hancock4,555 (2017)2.8km
Dollar Bay1,082 (2017)3.2km
South Range746 (2017)8.3km
Hubbell946 (2017)11.5km


Commodities (Major) - Copper
Deposit Type: Secondary Enrichment
Development Status: Past Producer
Deposit Model: 96: Native Cu

An underground copper mine consisting of four shafts located south of Houghton. John and Austin Mabbs, working on the Isle Royal Mine on tribute, discovered a rich vein of copper (richer than anything the Isle Royal had produced) crossing the property in 1864. The shafts were sunk to between 80 and 250 feet in depth where much barrel and stamp copper was removed. The first of several large masses of copper was removed in 1865 and continued until 1867 when the brothers stopped mining after Isle Royal resumed operation. The brothers came back to mine the vein in 1875 and only recovered one large mass; after this, the mine was closed for good. The main Mabbs “F Shaft” would remain covered until 2010 when contractors building the new AE Seaman Mineral Museum broke into the shaft while laying foundations for the building. The shaft was capped and is currently under the northwest corner of the Museum. Several pieces of copper were found around the shaft with some going into private collections and others on display in the new Museum.

Regions containing this locality

North America PlateTectonic Plate
Keweenaw Peninsula, Michigan, USAPeninsula

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

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


Mineral List


4 valid minerals.

Detailed Mineral List:

Azurite
Formula: Cu3(CO3)2(OH)2
Description: Found as third and final secondary on native copper recovered from a near-surface outcrop of the Mabbs Vein during construction of the Seaman Mineral Museum
Reference: Bornhorst, T. J., 2018, The Mabbs vein and the A. E. Seaman Mineral Museum of Michigan Tech: A. E. Seaman Mineral Museum, Web Publication 5, 21p. This is version 1 of A. E. Seaman Mineral Museum Web Publication 5 which was internally reviewed.
Copper
Formula: Cu
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Cuprite
Formula: Cu2O
Description: Found as the first growth of three secondaries on native copper recovered from a near-surface outcrop of the Mabbs Vein during construction of the Seaman Mineral Museum
Reference: Bornhorst, T. J., 2018, The Mabbs vein and the A. E. Seaman Mineral Museum of Michigan Tech: A. E. Seaman Mineral Museum, Web Publication 5, 21p. This is version 1 of A. E. Seaman Mineral Museum Web Publication 5 which was internally reviewed.
Malachite
Formula: Cu2(CO3)(OH)2
Description: Found as second of three secondaries on native copper recovered from a near-surface outcrop of the Mabbs Vein during construction of the Seaman Mineral Museum
Reference: Bornhorst, T. J., 2018, The Mabbs vein and the A. E. Seaman Mineral Museum of Michigan Tech: A. E. Seaman Mineral Museum, Web Publication 5, 21p. This is version 1 of A. E. Seaman Mineral Museum Web Publication 5 which was internally reviewed.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Copper1.AA.05Cu
Group 4 - Oxides and Hydroxides
Cuprite4.AA.10Cu2O
Group 5 - Nitrates and Carbonates
Azurite5.BA.05Cu3(CO3)2(OH)2
Malachite5.BA.10Cu2(CO3)(OH)2

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
Group 4 - SIMPLE OXIDES
A2X
Cuprite4.1.1.1Cu2O
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Azurite16a.2.1.1Cu3(CO3)2(OH)2
Malachite16a.3.1.1Cu2(CO3)(OH)2

List of minerals for each chemical element

HHydrogen
H MalachiteCu2(CO3)(OH)2
H AzuriteCu3(CO3)2(OH)2
CCarbon
C MalachiteCu2(CO3)(OH)2
C AzuriteCu3(CO3)2(OH)2
OOxygen
O MalachiteCu2(CO3)(OH)2
O CupriteCu2O
O AzuriteCu3(CO3)2(OH)2
CuCopper
Cu CopperCu
Cu MalachiteCu2(CO3)(OH)2
Cu CupriteCu2O
Cu AzuriteCu3(CO3)2(OH)2

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, HOUGHTON COUNTY, SITE ID 310042, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.
Kaminski-Hamka, T., 2011, Copper Mines of Houghton County, Michigan. Copperlady Press, 120 pp.
Kilpela, T, 1995, The Hard Rock Mining Era in the Copper Country. 89 pp.
This document may be cited as: Bornhorst, T. J., 2018, The Mabbs vein and the A. E. Seaman Mineral Museum of Michigan Tech: A. E. Seaman Mineral Museum, Web Publication 5, 21p. This is version 1 of A. E. Seaman Mineral Museum Web Publication 5 which was internally reviewed.


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