Delaware Mine

Keweenaw County, Michigan, United States

Copper

Land & claims · BLM · live

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BLM MLRS ↗Claims at this point ↗Surface mgmt ↗

Surface manager + active mining claims at this point, live from BLM. The "open to location" notes are a general 1872-Mining-Law guide, not BLM output — decision-support only; verify with BLM MLRS and on the ground before staking or entry.

Commodities

PrimaryCopper

Commodity typeMetallic

Deposit

Deposit typeVeins/Fissures

Model96: Native Cu

Deposit sizeSmall

Orebody formIRREGULAR

Materials

Ore mineralsCopper

Geology

Host rockBasalt · Portage Lake Volcanics

StructureSyncline, Four veins worked south of the Greenstone flow and under the Allouez conglo

Economic & production

Development statusPast Producer

First production1847

Last production1886

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References

BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF. PAPER NO. 144, 238 PP.CORNWALL, H.R., 1954, BEDROCK GEOLOGY OF THE DELAWARE QUADRANGLE, MICHIGAN: USGS MAP GQ-51, SCALE 1:24000JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, KEWEENAW COUNTY, P. 104-106, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.BUTLER AND BURBANK (1929)

Identification

Deposit ID10082630

MRDS IDW060068

Alternate namesConglomerate Mine

RegionNA

Data scoreB

Coordinates47.41972, -88.10643