Mine detail: Mass Fissure

Previously called ''

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Location

Lat / long:

47.29306, -88.37644

Resource(M)

Primary:	Copper
Ore:	Copper
Gangue:	Calcite, Quartz, Prehnite, Epidote, Laumontite
Orebody form:	FISSURE

Production

Operation type:	Underground
Production size:	Small
Development status:	Past Producer
Production years:	STILL ACTIVE IN 1925
First production started:	1909
Last production ended:	1925

Geology

Host rock:	Portage Lake Volcanics
Host type:	Basalt
Structure:	Mass fissure of the ahmeek mine was mined where it crossed the Kearsarge lo
Alteration processes:	Chloritization

References

MRDS	W060054
DEP	10082617
Reference	{Deposit:: BUTLER,B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF. PAPER NO. 144, 238 PP.}{Deposit:: WHITE, W.S., CORNWALL, H.R., AND SWANSON, R.W., 1953, BEDROCK GEOLOGY OF THE AHMEEK QUADRANGLE, MICHIGAN: USGS MAP GQ-27, SCALE 1:24000}{Production:: BUTLER AND BURBANK, 1929}
Reporter	Nicholson, Suzanne, Sutphin, D.M., Mason Jr., G.T.