Mine detail: Railroad Mine

Previously called 'Held Mine'

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Location

Lat / long: 44.7631, -116.79222

Resource(M)

Primary: Copper
Secondary: Bismuth, Gold, Silver
Ore: Bornite, Chalcopyrite
Gangue: Actinolite, Bismuth, Epidote, Pyrite, Quartz, Tremolite
Orebody form: IRREGULAR PODS, CHIMNEYS

Production

Operation type: Underground
Deposit type: Contact Metasomatic
Production size: Small
Development status: Past Producer

Geology

Host rock:Cuddy Mountain Limestone
Host type:Skarn (Tactite),Limestone
Associated type:Volcanic Rock (Aphanitic)
Structure:Domes And Folds; Faults And Steeply Tilted Beds
Tectonic:Island Arc
Alteration processes:Pyritization

References

MRDSW013003
MAS160870009
DEP10070239
Reference{Deposit:: BELL, R. N., 1904, REPORT OF THE MINING DISTRICTS OF IDAHO FOR THE YEAR 1903, P. 139 - 140.}{Deposit:: LIVINGSTON, D. C., 1925, RECON. OF MINERAL AND CUDDY MOUNTAIN DISTRICTS: IDAHO BUREAU OF MINES AND GEOLOGY PAMPHLET 13, P. 15 - 16.}{Deposit:: FANKHAUSER, R. E., 1969, GEOLOGY AND MINERALIZATION OF THE SOUTHERN CUDDY MOUNTAINS, WASHINGTON COUNTY, IDAHO: CORVALLIS, OREGON STATE UNIV., MS THESIS, 138 P.}{Deposit:: BRUCE, W. R., 1971, GEOLOGY, MINERAL DEPOSITS, AND ALTERATION OF PARTS OF THE CUDDY MTN. DIST., WESTERN IDAHO: CORVALLIS, OREGON STATE UNIV., PH.D. THESIS, 165 P.}{Deposit:: 5) BELL, R.N., 1907 , EIGHTH ANNUAL REPORT OF THE MINING INDUSTRY OF IDAHO FOR THE YEAR 1906 , 172 P.}{Deposit:: 1904 COMPILE ANN. REPT. OF IDAHO MINING INDUSTRY FOR 1903}{Deposit:: 1907 COMPILE ANN. REPT. OF IDAHO MINING INDUSTRY FOR 1906}{Deposit:: 1925 RECON IDAHO BUREAU OF MINES AND GEOLOGY PAMPHLET 13}{Deposit:: SEVENTH ANNUAL REPORT MINING INDUSTRY OF IDAHO PG.139-142}{Deposit:: EIGHTH ANNUAL REPORT MINING INDUSTRY OF IDAHO.PG 168-172}{Deposit:: NINTH ANNUAL REPORT MINING INDUSTRY OF IDAHO PG 207- 210}
ReporterNakai, Terry L.; Miller, Pat, Winters, Dick