Deposit
Model96: Native Cu
Deposit sizeS
Ore controlFissure
Geology
Host rockAndesite · "Ashbed Amygdaloid", "Portage Lake Volcanics"
Economic & production
Development statusPast Producer
Production yearsARNOLD MINE PROPER OPENED IN 1863 AND OPERATED FROM 1863 TO ABOUT 1869; CLOSED 1869-1892; ACTIVE 1892-1894; IDLE 1894 TO FEB 1897 WHEN WORK RESUMED.
First production1860
Last production1900
Identification
Deposit ID10082839
MRDS IDW062197
RegionNA
Data scoreB
Coordinates47.43, -88.19393
References
BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF PAPER NO. 144, 238 PP.CORNWALL, H. R., AND WRIGHT, J.C., 1954, BEDROCK GEOLOGY OF THE EAGLE HARBOR QUADRANGLE, MICHIGAN: U.S. GEOLOGICAL SURVEY, GEOLOGIC QUADRANGLE MAPS OF THE UNITED STATES, GQ 36, 1:24,000.BUTLER AND BURBANK, 1929