Mine detail: Atlantic Amygdaloid

Previously called 'Ashbed LodeAshbed AmygdaloidAtlantic Amygdaloid Lode'

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Location

Lat / long: 47.09889, -88.62727

Resource(M)

Primary: Copper
Ore: Copper
Gangue: Calcite, Quartz, Epidote, Pumpellyite-(Mg), Datolite

Production

Operation type: Underground
Production size: Small
Development status: Past Producer
Production years: ATLANTIC (1873-1910); S. PEWABIC (1866-70); GARDEN CITY (1859-66); ARNOLD (1989-1900); COPPER FALLS (1858-93); PETHERICK (1862-77); ASHBED (1881-84); PHOENIX (1855-62; 1865; 1916-17)
First production started: 1855
Last production ended: 1917

Geology

Host rock:Portage Lake Volcanics
Host type:Andesite
Structure:Numerous cross-cutting fissures.
Alteration processes:Bleaching of ferric iron to ferrous

References

MRDSW060042
DEP10111323
Reference{Deposit:: BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF. PAPER, NO. 144, 238 PP.}{Deposit:: WEEGE, R.J., AND POLLACK, J.P., 1971, RECENT DEVELOPMENTS IN THE NATIVE-COPPER DISTRICT OF MICHIGAN: IN W.S. WHITE, (EDITOR) GUIDEBOOK FOR FIELD CONFERENCE, MICHIGAN COPPER DISTRICT, SEPT. 30-0CT. 21,971, SOC. ECON. GEOL., P. 19-43}{Deposit:: WHITE, W.S., 1968, THE NATIVE COPPER DEPOSITS OF NORTHERN MICHIGAN: IN J.D. RIDGE, (EDITOR) ORE DEPOSITS OF THE UNITED STATES 1933-1967 (GRATON-SALES VOLUME), AM. INSTIT. MIN. METALL. PETROL. ENG., V. 1, P. 303-325.}{Deposit:: WHITE, W.S, 1956, GEOLOGIC MAP OF THE CHASSELL QUADRANGLE, MICHIGAN: USGS MAP MF-43, SCALE 1:24000}{Deposit:: WHITE, W.S., AND WRIGHT, J.C., 1956, GEOLOGIC MAP OF THE SOUTH RANGE QUADRANGLE, MICHIGAN: USGS MAP MF-48, SCALE 1:24000.}{Deposit:: CORNWALL, H.R., AND WRIGHT, J.C., 1954, BEDROCK GEOLOGY OF THE EAGLE HARBOR QUADRANGLE, MICHIGAN: USGS MAP GQ-36, SCALE 1:24000.}{Deposit:: BODWELL, W.A., 1972, GEOLOGIC COMPILATION AND NONFERROUS METAL POTENTIAL, PRECAMBRIAN SECTION, NORTHERN MICHIGAN: HOUGHTON, MICHIGAN TECHNOLOGICAL UNIVERSITY, M.S. THESIS, 98 P.}{Deposit:: BORNHORST, THEODORE J., 1992, KEWEENAWAN COPPER DEPOSITS OF WESTERN UPPER MICHIGAN; AN OVERVIEW OF THE KEWEENAW PENINSULA NATIVE COPPER DISTRICT, MICHIGAN: GUIDEBOOK SERIES, VOL. 13, P. 33-62.}{Deposit:: CORNWALL, H.R., 1954, BEDROCK GEOLOGY OF THE PHOENIX QUADRANGLE, MICHIGAN: USGS MAP GQ-34, SCALE 1:24000}{Production:: WHITE, 1968 WEEGE AND POLLACK, 1971}
ReporterNicholson, Suzanne, Sutphin, D.M., Mason Jr., G.T., Woodruff, Laurel G.