Mine detail: Fanny Fern Mine

Previously called 'Patented Claim: Fanny Fern, MS 699Unpatented Claims: Fanny Fern No. 2B. R. LodeJ. C. LodeSpringfieldMayday Lode'

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Location

Lat / long:

38.01473, -107.33757

Resource(M)

Primary:	Silver, Gold, Lead
Secondary:	Copper, Zinc
Tertiary:	Antimony
Ore:	Chalcopyrite, Galena, Malachite, Pyrargyrite, Smithsonite, Sphalerite
Gangue:	Barite, Quartz

Production

Operation type:	Unknown
Deposit type:	Vein
Production size:	Small
Development status:	Past Producer
Last production ended:	1952

Geology

Host type:	Rhyolite
Associated rock:	Eureka Member Of Sapinero Mesa Tuff
Associated type:	Rhyolite
Structure:	San Juan Volcanic Field, San Juan Depression, San Juan-Uncompahgre Calderas, Lake City Caldera
Tectonic:	Central Cordillera (Southern Rocky Mtns)

References

MRDS	D011556
DEP	10014675
Reference	{Deposit:: IRVING, J.D., AND BANCROFT, HOWLAND, 1911, GEOLOGY AND ORE DEPOSITS NEAR LAKE CITY, COLORADO: USGS BULL. 478.}{Deposit:: LIPMAN, P.W., 1976, GEOLOGIC MAP OF THE LAKE CITY CALDERA AREA, WESTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-962.}{Deposit:: LIPMAN, P.W., AND OTHERS, 1976, MULTIPLE AGES OF MID-TERTIARY MINERALIZATION AND ALTERATION IN THE WESTERN SAN JUAN MOUNTAINS, COLORADO: ECON. GEOLOGY, V. 71, NO. 3, P. 571-588.}{Deposit:: SLACK, J.F., 1980, MULTISTAGE VEIN ORES OF THE LAKE CITY DISTRICT, WESTERN SAN JUAN MOUNTAINS, COLORADO: ECON. GEOLOGY, V. 75, NO. 7, P. 963-991.}{Deposit:: COLORADO DIV. MINES INF. REPTS. AND ANNUAL OPERATOR REPTS.}{Deposit:: BLM MINERAL SURVEY MS 699}{Deposit:: BROWN, W.H., 1926, THE MINERAL ZONES OF THE WHITE CROSS DISTRICT AND NEIGHBORING DEPOSITS IN HINSDALE COUNTY, COLORADO: MINES MAG., V. 15, NO. 11, P. 5-15.}{Production:: COLORADO DIV. MINES ANNUAL OPERATOR REPTS.}
Reporter	Schwochow, Stephen D.