Commodities
PrimaryCopper
Commodity typeM
Deposit
Deposit typeSecondary Enrichment
Model96: Native Cu
Deposit sizeS
Orebody formIRREGULAR
Ore controlStratigraphic-in top few feet of sandstone immediately under the lake shore trap.
Materials
Ore mineralsCopper, Chalcocite
GangueQuartz, Calcite, Chlorite, Feldspar, Silver
Geology
Host rockSandstone · Copper Harbor Formation
AlterationRemoval of hematite, copper replacement, sandstone bleaching
Economic & production
Development statusPast Producer
First production1858
Last production1898
Identification
Deposit ID10080401
MRDS IDW031531
RegionNA
Data scoreB
Coordinates46.81472, -89.7162
References
COPPER RANGE CO., UNPUBLISHED, 1968, BEDROCK GEOLOGY MAP OF THE WHITE PINE (SW 1/4) QUADRANGLE, ONTONAGON COUNTY, MICHIGAN. GEOLOGY MAPPED AND COMPILED BY COPPER RANGE EXPLORATION CO., INC., AND BY H. HUBBARD (U.S.G.S.)BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: U.S. GEOLOGICAL SURVEY PROF. PAPER 144, 238P.WILBAND, J.T., 1978, THE COPPER RESOURCES OF NORTHERN MICHIGAN; PREPARED FOR THE U.S. BUREAU OF MINES, CONTRACT NO. J0366067, 66P.JOHNSON, A.M., AND GROTH, E.H.,1998, INVENTORY OF UNDERGROUND MINES, ONTONAGON COUNTY, P. 33-36, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.BUTLER AND BURBANK (1929)