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Hermada Antimony Mine

Past Producer in Elmore county in Idaho, United States with commodity Antimony
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Mineral rights holdings
  17. Land status
  18. Ownership information
  19. Production statistics
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10070739
MRDS ID W013806
MAS/MILS ID 0160390044
Record type Site
Current site name Hermada Antimony Mine

Geographic coordinates

Geographic coordinates: -115.34454, 43.85958 (WGS84)
Elevation 1768
Relative position 77 MI. BY ROAD NE OF BOISE; 20 MI. W. OF ATLANTA, IDAHO; 24.75 MI. ENE OF IDAHO CITY, ID.

Site location context

Political divisions (FIPS codes)

Elmore(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Phifer Creek(quadrangle 1:24,000 scale)

Idaho City(quadrangle 1:100,000 scale)

Hailey(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

North and Middle Forks Boise(hydrologic unit)

Middle Snake-Boise(hydrologic accounting unit)

Middle Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Boise National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Idaho Elmore

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 006N 009E 13 SWSENW Idaho

Commodities

Commodity Importance
Antimony Critical Primary

Materials information

Materials Type of material
Antimony Ore
Cervantite Ore
Kermesite Ore
Stibiconite Ore
Stibnite Ore
Limonite Gangue
Pyrite Gangue
Quartz Gangue
Sericite Gangue

Alteration

  • (Local) Sericitization, Silicification, Pyritization, Calcification, Chloritization, Hydrothermal Alteration

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Idaho Batholith-Granite;Intrusive Dikes
    Rock description Idaho Batholith-Granite;Intrusive Dikes
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite

Nearby scientific data

(1) -115.34454, 43.85958
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Nnw Hermada Fault And Fissure Zone

Ore body information

  • General form IRREGULAR
    Strike N
    Dip 55 DEG E
    Thickness 0.91M
    Length 35.05M
    Width 1.52M
  • General form IRREGULAR
    Dip 55 DEG E

Controls for ore emplacement

  • Sheared, Fractured, Faulting

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1947
Year of first production 1947

Mining district

District name Swanholm District
District name Black Warrior Basin District

Mineral rights holdings

Type of mineral rights Patented
Type of mineral rights Located Claim

Land status

Ownership category National Forest
Area name Boise National Forest

Ownership information

  • Type Owner-Operator
    Owner Hermada Mining Co.

Production statistics

  • Year 1950
    Period 1947-1950
    Material ORE
    Accuracy Accurate
    Description Cp_Grade: ^12.74% Sb
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Antimony Antimony 13wt-pct

Comments on 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.

Reference information

Bibliographic references

  • Deposit

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

  • Deposit

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

  • Deposit

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

  • Deposit

    1948 Geolmap USBM Rept. Inv. 4950

  • Deposit

    1955 Compile Idaho Bureau Of Mines And Geology Pamphlet 105

  • Deposit

    1975 Compile Idaho Dept. Labor And Ind. Serv., 1st Ann. Rept. Addendum

  • Production

    Popoff, C. C., 1953, USBM Rept. Inv. 4950

General comments

Subject category Comment text
Deposit Veins Trend N 15 Deg W - N 10 Deg E

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1976 Everett, Sandra E. (Miller, Pat) U.S. Geological Survey
Reporter 13-MAR-1995 Ridenour, James U.S. Bureau of Mines

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site