Mine detail: Delaware Mine

Previously called 'Conglomerate Mine'

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Location

Lat / long:

47.41972, -88.10643

Resource(M)

Primary:	Copper
Ore:	Copper
Orebody form:	IRREGULAR

Production

Operation type:	Underground
Deposit type:	Veins/Fissures
Production size:	Small
Development status:	Past Producer
First production started:	1847
Last production ended:	1886

Geology

Host rock:	Portage Lake Volcanics
Host type:	Basalt
Structure:	Syncline, Four veins worked south of the Greenstone flow and under the Allouez conglo

References

MRDS	W060068
DEP	10082630
Reference	{Deposit:: BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF. PAPER NO. 144, 238 PP.}{Deposit:: CORNWALL, H.R., 1954, BEDROCK GEOLOGY OF THE DELAWARE QUADRANGLE, MICHIGAN: USGS MAP GQ-51, SCALE 1:24000}{Deposit:: JOHNSON, A.M. AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, KEWEENAW COUNTY, P. 104-106, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.}{Production:: BUTLER AND BURBANK (1929)}
Reporter	Nicholson, Suzanne, Sutphin, D.M., Mason Jr., G.T., Anderson, Arlene (M. Gere)