Michigan · Houghton County
Past Producer

Atlantic Amygdaloid

Houghton County, Michigan, United States
Copper
⌖ Show on mapUSGS source ↗
Commodities
PrimaryCopper
Commodity typeM
Deposit
Deposit sizeS
Ore controlAmygdaloidal flow top
Materials
Ore mineralsCopper
GangueCalcite, Quartz, Epidote, Pumpellyite-(Mg), Datolite
Geology
Host rockAndesite · Portage Lake Volcanics
StructureNumerous cross-cutting fissures.
AlterationBleaching of ferric iron to ferrous
Economic & production
Development statusPast Producer
Production yearsATLANTIC (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 production1855
Last production1917
Identification
Deposit ID10111323
MRDS IDW060042
Alternate namesAshbed Lode, Ashbed Amygdaloid, Atlantic Amygdaloid Lode
RegionNA
Data scoreB
Coordinates47.09889, -88.62727
References
BUTLER, B.S., AND BURBANK, W.S., 1929, THE COPPER DEPOSITS OF MICHIGAN: USGS PROF. PAPER, NO. 144, 238 PP.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. 19-43WHITE, 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.WHITE, W.S, 1956, GEOLOGIC MAP OF THE CHASSELL QUADRANGLE, MICHIGAN: USGS MAP MF-43, SCALE 1:24000WHITE, W.S., AND WRIGHT, J.C., 1956, GEOLOGIC MAP OF THE SOUTH RANGE QUADRANGLE, MICHIGAN: USGS MAP MF-48, SCALE 1:24000.CORNWALL, H.R., AND WRIGHT, J.C., 1954, BEDROCK GEOLOGY OF THE EAGLE HARBOR QUADRANGLE, MICHIGAN: USGS MAP GQ-36, SCALE 1:24000.BODWELL, W.A., 1972, GEOLOGIC COMPILATION AND NONFERROUS METAL POTENTIAL, PRECAMBRIAN SECTION, NORTHERN MICHIGAN: HOUGHTON, MICHIGAN TECHNOLOGICAL UNIVERSITY, M.S. THESIS, 98 P.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.CORNWALL, H.R., 1954, BEDROCK GEOLOGY OF THE PHOENIX QUADRANGLE, MICHIGAN: USGS MAP GQ-34, SCALE 1:24000WHITE, 1968 WEEGE AND POLLACK, 1971