Michigan · Ontonagon County
Past Producer

Old Mass

Ontonagon County, Michigan, United States
CopperSilver
⌖ Show on mapUSGS source ↗
Commodities
TertiaryCopper, Silver
Commodity typeM
Economic & production
Development statusPast Producer
First production1857
Discovery year1856
Identification
Deposit ID10243231
RegionNA
Data scoreB
Coordinates46.8139, -89.10757
References
BUTLER,B.S. AND BURBANK,W.S. (1929) THE COPPER DEPOSITS OF M: USGS PROF. PAPER 144.WHITLOW,J.W. (1974) GEOLOGIC MAP OF THE GREENLAND AND ROCKLARANGLES, ONTONAGON COUNTY, MICHIGAN. USGS MAP MF-596.PATRICK,J.L.(1966) REPORT ON THE CALEDONIA: UNPUBLISHED COMPORT, WHITEPINE COPPER COMPANY.MILLER,E.W. (1958) HISTORICAL RESUME OF THE MASS CONSOLIDATEG COMPANY, ONTONAGON, MICHIGAN: UNPUBLISHED COMPANY REPORT,AND HECLA, INC.POLLOCK,J. (1959) PRELIMINARY REPORT ON THE CALEDONIA PROJECBLISHED COMPANY REPORT, CALUMET AND HECLA CONSOLIDATED MININWHITE,W.S.(1968) THE NATIVE-COPPER DEPOSITS OF NORTHERN MICHN ORE DEPOSITS OF THE UNITED STATES,1933-1967. JOHN D.RIDGE,THE AMERICAN INSTITUTE OF MINING, METALLURGICAL,AND PETROLENEERS, INC. 1970.BRODERICK,T.M., HOHL,C.D., EIDEMILLER,H.N. (1946), RECENT COIONS TO THE GEOLOGY OF THE MICHIGAN COPPER DISTRICT: IN ECONOLOGY AND THE BULLETIN OF THE SOCIETY OF ECONOMIC GEOLOGISTSXLI.