Mine detail: Eagle Mine

Previously called 'New Jersey Zinc Co. Eagle MineGilman Mineincludes the Little Chief, Iron Mask, Belden, and Black Iron mines'

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Location

Lat / long:

39.52859, -106.39591

Resource(M)

Primary:	Zinc, Silver, Copper, Lead, Gold
Secondary:	Manganese
Ore:	Chalcopyrite, Galena, Sphalerite, Tetrahedrite
Gangue:	Dolomite, Pyrite, Quartz, Siderite, Barite
Discovery year:	1879

Production

Operation type:	Underground
Development status:	Past Producer
First production started:	1879

Geology

Host rock:	Sawatch Quartzite, Peerless Formation, Parting Formation, Dyer Dolomite, Leadville Dolomite, Belden Formation, Minturn Formation
Host type:	Orthoquartzite,Mixed Clastic/Carbonate Rock,Dolomite,Clastic Sedimentary Rock
Associated rock:	Cross Creek Granite, Harding Sandstone, Gilman Sandstone, Pando Porphyry
Associated type:	Granite,Sandstone,Quartz Latite
Structure:	NE flank of Sawatch anticline
Alteration processes:	dolomitization and dissolution

References

MRDS	DC04486
MAS	80370001
DEP	10190716
Reference	{Deposit:: Long, K. R., DeYoung, J. H., Jr., and Ludington, S. D., 1998, Database of significant deposits of gold, silver, copper, lead, and zinc in the United States: Geological Survey Open-File Report 98-206, pt. B.}{Deposit:: Radabaugh, R. E., Merchant, J. S., and Brown, J. M., 1968, Geology and ore deposits of the Gilman (Red Cliff, Battle Mountain) district, Eagle County, Colorado, in Ridge, J. D., editor, Ore deposits of the United States, 1933-1967 (Graton-Sales volume): New York, American Institute of Mining Engineers, p. 641-664.}{Geology:: LOVERING, T. S., OGDEN TWETO, AND T. G. LOVERING. ORE DEPOSITS OF THE GILMAN DISTRICT, EAGLE COUNTY, COLORADO, U.S. GEOLOGICAL SURVEY PROF. PAPER 1017, 1978, 90 PP.}{Reserve-Resource:: GULF & WESTERN SEC FORM 10-K, JUL 31, 1977, P. 7.}{Reserve-Resource:: GULF & WESTERN SEC FORM 10-K, JUL 31, 1978, P. 26, 27.}{Workings:: GENTRY, D. W. LEAD & ZINC IN COLORADO & WYOMING, BUMINES GRANT GO264005, SEP 1976, 211 PP.}{Workings:: MINING ENGINEERING MAGAZINE. NEW JERSEY ZINC, THE EAGLE MINE, DECEMBER 1953, PP. 1224-5.}
Reporter	Hite, Alan G., Beach, Richard A.