Mine detail: Standard - Mammoth Mine

Previously called 'Greenhill - Cleveland MineMammoth MineStandard MineMace Mine'

<< Back to the map

Location

Lat / long:

47.52427, -115.83742

Resource(M)

Primary:	Silver, Lead
Secondary:	Zinc
Tertiary:	Gold, Copper
Ore:	Chalcopyrite, Galena, Sphalerite, Tetrahedrite
Gangue:	Barite, Hematite, Magnetite, Pyrite, Pyrrhotite, Quartz, Siderite
Orebody form:	PINCH AND SWELL
Discovery year:	1887

Production

Operation type:	Underground
Deposit type:	HYDROTHERMAL VEIN AND REPLACEMENT
Production size:	Medium
Development status:	Past Producer
Production years:	1890-1952, 1969
First production started:	1890
Last production ended:	1965

Geology

Host rock:	Burke Formation
Host type:	Quartzite
Structure:	Standard Fault, a shear plane subsidiary to the Osburn Fault to the south.
Tectonic:	Belt Basin
Alteration processes:	Zone of disseminated siderite extends 10s to 100s of meters out from the veins, passing into a siderite-ankerite zone up to 10s of meters wide, and then into a zone of ankerite-calcite 100s of meters wide.

References

MRDS	W026657
DEP	10078364
Reference	{Deposit:: Fryklund, V. C., Jr., 1964 , Ore deposits of the Coeur *lene district, Shoshone County, Idaho: US Geological Survey Professional Paper 445 , 103 p.}{Deposit:: Ransome, F. L., and Calkins, F. C., 1908 , The geology and ore deposits of the Coeur *lene district, Idaho: US Geological Survey Professional Paper 62 , 203 p.}{Deposit:: Umpleby, J. B., and Jones, E. L., Jr., 1923 , Geology and ore deposits of Shoshone County, Idaho: US Geological Survey Bulletin 732 , 156 p.}{Geology:: Griggs, A. B., 1952 , Geology and notes on ore deposits of Canyon - Nine Mile Creeks Area, Shoshone County, Idaho: US Geological Survey Open File Report 55-55, 108 p.}{Production:: Crosby, Garth M., 1959, The mineral belts north of Osburn fault, Coeur *lene district, Shoshone County, Idaho: Minneapolis, University of Minnesota, GE thesis, 39 p.}{Production:: Mitchell, V.E., and Bennett, E.H., 1983, Production statistics for the Coeur *lene mining district, Shoshone County, Idaho, 1884-1980: Idaho Geological Survey Technical Report 83-3, 33 p.}
Reporter	Miller, Pat J., Kauffman, John D., Long, Keith R.