Mine detail: Elkhorn Mine

Previously called 'Holter'

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Location

Lat / long:

46.2724, -111.94254

Resource(M)

Primary:	Lead, Zinc, Silver
Secondary:	Copper, Gold
Tertiary:	Bismuth
Ore:	Bournonite, Galena, Silver, Sphalerite, Tetradymite, Tetrahedrite
Gangue:	Quartz
Orebody form:	IRREGULARLY TABULAR AND ALSO PIPE-LIKE
Discovery year:	1875

Production

Operation type:	Unknown
Deposit type:	Polymetalic Replacement
Production size:	Yes
Development status:	Past Producer
First production started:	1875

Geology

Host rock:	Pilgrim Dolomite-Dolomite;Red Lion Formation-Siliceous Cherty Argillite
Host type:	Dolomite
Structure:	Ore Is Localized In Anticlinal Arches Along Pilgrim Dolomite-Red Lion Contact
Alteration processes:	Some Bleaching Of Slate Near Ore Bodies

References

MRDS	M060835
DEP	10042800
Reference	{Deposit:: KLEPPER, M.R., WEEKS, R.A., RUPPEL, E.T., 1957, GEOLOGY OF THE SOUTHERN ELKHORN MOUNTAINS, JEFFERSON AND BROADWATER COUNTIES, MONTANA: USGS PROF. PAPER, P. 67-68}{Deposit:: WEED, W.H., 1901, GEOLOGY AND ORE DEPOSITS OF THE ELKHORN MINING DISTRICT, JEFFERSON COUNTY, MONTANA: USGS 22ND ANN. RPT. PT. 2 P. 399-550}{Deposit:: 1896 GEOLMAP WEED, W.H., 22ND ANN. RPT.}{Deposit:: 1949 GEOLMAP KLEPPER, WEEKS, AND RUPPEL, PROF. PAPER 292}{Deposit:: FOSTER, FESS, AND CHILDS, J.F., 1993, AN OVERVIEW OF SIGNIFICANT LODE GOLD SYSTEMS IN MONTANA, AND THEIR REGIONAL GEOLOGIC SETTING: EXPLORATION AND MINING GEOLOGY, V. 2, P. 217-244.}{Deposit:: KOSCHMANN, A.H., AND BERGENDAHL, M.H., 1968, PRINCIPAL GOLD-PRODUCING DISTRICTS OF THE UNITED STATES: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 610, P. 153.}{Production:: WEED, W.H., 1901, P. 415; KLEPPER ETAL, 1957, P. 67 AND OME FILES.}
Reporter	Puffett, Willard P.