Mine detail: F. M. D. Mine

Previously called 'FMD Mine'

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Location

Lat / long:

39.68072, -105.2882

Resource(M)

Primary:	Copper
Tertiary:	Zinc
Ore:	Chalcopyrite, Pyrite
Gangue:	Apatite, Hematite, Labradorite, Limonite, Magnetite, Malachite, Siderite

Production

Operation type:	Surface-Underground
Production size:	Small
Development status:	Past Producer

Geology

Host rock:	Idaho Springs Formation-Hornblende Gneiss And Amphibolite
Host type:	Schist
Associated rock:	Pegmatite;Silver Plume Quartz Monzonite
Associated type:	Quartz Monzonite,Pegmatite
Structure:	Front Range Uplift, Denver Basin, Floyd Hill Fault Zone, Bear Creek Shear Zone, Yankee Creek Pluton
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Fe Oxidation

References

MRDS	D010213
DEP	10013752
Reference	{Deposit:: LINDGREN, WALDEMAR, 1908, NOTES ON COPPER DEPOSITS IN CHAFFEE, FREMONT, AND JEFFERSON COUNTIES, COLO.: USGS BULL. 340, P. 157-174}{Deposit:: SHERIDAN, D.M., AND OTHERS, 1972, GEOLOGIC MAP OF THE EVERGREEN QUADRANGLE, JEFFERSON COUNTY, COLORADO: USGS MAP I-786-A}{Deposit:: LOVERING, T.S., AND GODDARD, E.N., 1950, GEOLOGY AND ORE DEPOSITS OF THE FRONT RANGE, COLORADO: USGS PROF. PAPER 223, P. 67-68.}
Reporter	Schwochow, Stephen D.