Mine detail: Lafayette Mine

Location:	Ontonagon County, Michigan, United States, North America
Lat / long:	46.77778, -89.82093
dep_id:	10080395
mrds_id:	W031523
Commodity type:	metallic
Major mineral:	Copper
Operation type:	Underground
Deposit type:	Secondary Enrichment
Production size:	Small ammount of material produced
Development status:	Past Producer
ore:	Copper, Chalcocite
gangue:	Quartz, Calcite, Chlorite, Feldspar, Silver
model:	96: Native Cu
alteration:	Copper replacement, sandstone bleaching
ore_ctrl:	Stratigraphic-in top few feet of sandstone immediately beneath lake shore trap.
Reporter:	Yeager, Keith (Cannon, W.), Sutphin, D.M., Mason Jr., G.T., Anderson, Arlene (M. Gere)
hrock_unit:	Copper Harbor Formation
hrock_type:	Sandstone
Year first produced:	1844
yr_lst_prd:	1865
References:	Deposit:: COPPER RANGE CO., UNPUBLISHED, 1968, REDROCK GEOLOGY MAP OF THE CARP RIVER (SE 1/4 QUADRANGLE, ONTONAGON COUNTY, MICHIGAN. GEOLOGY MAPPED AND COMPILED BY COPPER RANGE EXPLORATION CO., INC., AND BY H. HUBBARD (U.S.G.S.) Deposit:: BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: U.S. GEOLOGICAL SURVEY PROF. PAPER 144, 238 P. Deposit:: WILBAND, J.T., 1978, THE COPPER RESOURCES OF NORTHERN MICHIGAN, PREPARED FOR THE U.S. BUREAU OF MINES, CONTRACT NO. J0366067, 66P. Deposit:: JOHNSON, A.M., AND GROTH, E.H., 1998, INVENTORY OF UNDERGROUND MINES, ONTONAGON COUNTY, P. 102-103, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.