Hermada Antimony Mine

The Hermada Antimony Mine is a antimony mine located in Elmore county, Idaho at an elevation of 5,801 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Name: Hermada Antimony Mine  

State:  Idaho

County:  Elmore

Elevation: 5,801 Feet (1,768 Meters)

Commodity: Antimony

Lat, Long: 43.8597, -115.34360

Map: View on Google Maps

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Satelite image of the Hermada Antimony Mine

Hermada Antimony Mine MRDS details

Site Name

Primary: Hermada Antimony Mine


Primary: Antimony


State: Idaho
County: Elmore
District: Black Warrior Basin District

Land Status

Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Administrative Organization: Boise National Forest


Type: Patented
Type: Located Claim


Not available


Owner Name: Hermada Mining Co.


Year: 1950
Time Period: 1947-1950
Material type: ORE
Description: Cp_Grade: ^12.74% Sb


Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Surface-Underground
Year First Production: 1947
Discovery Year: 1947
Discovery Method: Unknown
Years of Production:
Significant: N
Deposit Size: S


General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Sawtooth Mountains

Mineral Deposit Model

Not available





Type: L
Description: Nnw Hermada Fault And Fissure Zone


Alteration Type: L
Alteration Text: Sericitization, Silicification, Pyritization, Calcification, Chloritization, Hydrothermal Alteration


Name: Plutonic Rock
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene

Name: Plutonic Rock
Role: Associated
Age Type: Host Rock
Age Young: Late Jurassic

Analytical Data

Not available


Ore: Stibnite
Ore: Kermesite
Ore: Stibiconite
Ore: Antimony
Ore: Cervantite
Gangue: Sericite
Gangue: Limonite
Gangue: Pyrite
Gangue: Quartz


Comment (Development): Other Claims Belonging To Hermada Mining Co.: Hermada Nos. 1 - 49, White Knob Nos. 19 - 30, Diana Lee, Carol Lee, Yellow Tom. ; Econ.Com: Low Lead And Arsenic Content Makes The Concentrate Desirable For The Chemical Industry.

Comment (Deposit): Veins Trend N 15 Deg W - N 10 Deg E


Reference (Deposit): Popoff, C. C., 1953, Hermada Antimony Deposit, Elmore County, Idaho: USBM Rept. Inv. 4950, 21 P.

Reference (Deposit): Idaho Dept. Of Labor And Industrial Services, July 1974 - June 1975, First Annual Rept. Addendum, 95 P.

Reference (Deposit): Hubbard, C.R., 1955 , A Survey Of The Mineral Resources Of Idaho: Idaho Bureau Of Mines And Geology Pamphlet 105 , 56 P.

Reference (Deposit): 1948 Geolmap USBM Rept. Inv. 4950

Reference (Deposit): 1955 Compile Idaho Bureau Of Mines And Geology Pamphlet 105

Reference (Deposit): 1975 Compile Idaho Dept. Labor And Ind. Serv., 1st Ann. Rept. Addendum

Reference (Production): Popoff, C. C., 1953, USBM Rept. Inv. 4950

Idaho Gold

Where to Find Gold in Idaho

"Where to Find Gold in Idaho" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Idaho. Read more at Where to Find Gold in Idaho.