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  3. Mineral Resource Data System (MRDS)

Lemhi Union Mine

Past Producer in Lemhi county in Idaho, United States with commodities Lead, Silver, Gold, Copper
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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. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Ownership information
  17. Production statistics
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10071999
MRDS ID W015802
MAS/MILS ID 0160590324
Record type Site
Current site name Lemhi Union Mine

Geographic coordinates

Geographic coordinates: -113.27059, 44.3918 (WGS84)
Elevation 2743
Relative position 4.5 MI S OF GILMORE

Site location context

Political divisions (FIPS codes)

Lemhi(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Gilmore(quadrangle 1:24,000 scale)

Borah Peak(quadrangle 1:100,000 scale)

Dubois(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Birch(hydrologic unit)

Upper Snake(hydrologic accounting unit)

Upper Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Salmon-Challis 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 Lemhi

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 012N 027E 08 C W2 Idaho

Comments on the location information

  • Near Head Of Lemhi Union Gulch; Location Approximate And Taken From Gilmore 1:62500 Map

Commodities

Commodity Importance
Lead Primary
Silver Primary
Gold Secondary
Copper Secondary

Materials information

Materials Type of material
Galena Ore
Iron Gangue

Alteration

  • (Local) Oxidized

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Dike-Diorite
    Rock description Dike-Diorite
    Stratigraphic age (youngest) Eocene
    Stratigraphic age (youngest) Late Devonian
    Stratigraphic age (youngest) Late Devonian
    Stratigraphic age (youngest) Paleocene
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Limestone
    Rock description Limestone

Nearby scientific data

(1) -113.27059, 44.3918
ListMap

Economic information

Ore body information

  • General form TABULAR
    Strike N 20 DEG E
    Dip 80 DEG NW
    Width 1.22M

Controls for ore emplacement

  • Contact
  • Fissures

Comments on the geologic information

  • Limestone Strikes N 20 Deg E And Dips 80 Deg Nw
  • Original alteration entry:
    Local - Oxidized
  • Original ore control entry:
    At Depth, Contact Of Limestone And Dike; Fissures

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1882

Mining district

District name Spring Mountain District

Land status

Ownership category National Forest
Area name Salmon National Forest

Ownership information

  • Type Owner
    Owner Lemhi Mining Co.

Production statistics

  • Year 1910
    Period 1909-1910
    Material ORE
    Accuracy Accurate
    Description Cp_Grade: ^39 % Pb, 12 Oz Ag/Ton Ave
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Ore Silver Silver 339g/mt
    Major Ore Lead Lead 39wt-pct

Comments on the production information

  • Several Carloads Of Ore Produced In 1907 Ran 71% Pb, 48 Oz/Ton Ag, $5/Ton Au And 4% Cu.

Workings at the site

  • Type of workings Underground
    Overall depth 36.58M

Reference information

Bibliographic references

  • Deposit

    Umpleby, J. B., 1913, Geology And Ore Deposits Of Lemhi County, Idaho: USGS Bull 528, P. 88.

  • Deposit

    Bell, R. N., 1908, Ninth Annual Report Of The Mining Industry Report Of Idaho For The Year 1907

  • Production

    Item 8, Umpleby, J. B., 1913, USGS Bull 528, P. 88; Item 1, Bell, R.N., 1908, Mining Industry Report For 1907

General comments

Subject category Comment text
Deposit Discovery Year: EARLY 1880'S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1976 Siefken, Robert R. (Miller, Pat) U.S. Geological Survey
Reporter 13-MAR-1995 Western Field Operations Center (WFOC) 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