Mine detail: Terrible Mine

Previously called 'Ilse Lead Mine'

<< Back to the map

Location

Lat / long:

38.21862, -105.24724

Resource(M)

Primary:	Lead
Secondary:	Silver, Gold
Ore:	Phosgenite, Cerussite
Gangue:	Calcite, Chalcedony, Chert, Limonite, Manganese Ox-Hydrous
Orebody form:	LENS
Discovery year:	1879

Production

Operation type:	Surface-Underground
Production size:	Small
Development status:	Past Producer
First production started:	1884
Last production ended:	1943

Geology

Host rock:	Undivided Gneiss
Host type:	Gneiss
Associated rock:	Syenite Dike;Diorite Dike
Associated type:	Syenite,Diorite
Structure:	Wet Mountains, Ilse Fault; Mine Near Intersection Of Ilse And Another Nw-Trending Fault
Tectonic:	Central Cordillera, Southern Rocky Mountains
Alteration processes:	Extensive Oxidation, Iron Staining

References

MRDS	D008909
DEP	10012903
Reference	{Deposit:: HUNTER, J.F., 1915, SOME CERUSITE DEPOSITS IN CUSTER COUNTY, COLORADO, IN CONTRIBUTIONS TO ECONOMIC GEOLOGY: USGS BULLETIN 580, P. 25-37}{Deposit:: ECKEL, E.B., 1961, MINERALS OF COLORADO, A 100-YEAR RECORD: USGS BULLETIN 1114, P. 96}{Deposit:: VANDERWILT, J.W., 1947, MINERAL RESOURCES OF COLORADO: COLORADO MINERAL RESOURCES BOARD, P. 69}{Deposit:: SCOTT, G.R., TAYLOR, R.B., EPIS, R.C. AND WOBUS, R.A., 1978, GEOLOGIC MAP OF THE PUEBLO 1 DEGREE X 2 DEGREE QUADRANGLE, SOUTH-CENTRAL COLORADO: USGS MAP I-1022, 1:250,000}{Deposit:: COLORADO DIVISION OF MINES, 1982, INSPECTION RECORDS 1921-1942.}{Production:: VANDERWILT, 1947; COLORADO DIVISION MINES, 1982;}{Reserve-Resource:: COLORADO DIVISION MINES, INSPECTION RECORDS.}
Reporter	Collins, Donna B., Spanksi, Gregory T.