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Elkhorn Mine

Past Producer in Jefferson county in Montana, United States with commodities Silver, Lead, Zinc, Copper, Gold, Bismuth
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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. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Mining district
  17. Ownership information
  18. Production statistics
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10042800
MRDS ID M060835
Record type Site
Current site name Elkhorn Mine
Alternate or previous names Holter

Geographic coordinates

Geographic coordinates: -111.94254, 46.2724 (WGS84)
Elevation 2012
Relative position NORTH BOUNDARY OF ELKHORN, MONTANA

Site location context

Political divisions (FIPS codes)

Jefferson(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Elkhorn(quadrangle 1:24,000 scale)

Townsend(quadrangle 1:100,000 scale)

White Sulphur Springs(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Boulder(hydrologic unit)

Missouri Headwaters(hydrologic accounting unit)

Missouri Headwaters(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Beaverhead-Deerlodge 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 Montana Jefferson

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 006N 003W 14 Montana

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Critical Primary
Copper Secondary
Gold Secondary
Bismuth Critical Tertiary

Materials information

Materials Type of material
Bournonite Ore
Galena Ore
Silver Ore
Sphalerite Ore
Tetradymite Ore
Tetrahedrite Ore
Quartz Gangue

Alteration

  • (Local) Some Bleaching Of Slate Near Ore Bodies

Analytical data

Result AVERAGE OF 7,000 TONS BETWEEN 1945 AND 1951 IS 0.0178 OZ AU/TON, 11.1 OZ AG/TON, 12.15% PB, 2.55% ZN, AND 0.14% CU

Mineral occurrence model information

Model code 72
USGS model code 19a
Deposit model name Polymetallic replacement
Mark3 model number 47

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite
    Rock unit name Pilgrim Dolomite-Dolomite;Red Lion Formation-Siliceous Cherty Argillite
    Rock description Pilgrim Dolomite-Dolomite;Red Lion Formation-Siliceous Cherty Argillite
    Stratigraphic age (youngest) Late Cambrian

Economic information

Geologic structures

Type of structure Local
Structure description Ore Is Localized In Anticlinal Arches Along Pilgrim Dolomite-Red Lion Contact
Type of structure Regional
Structure name FOLDED AND FAULTED BELT SERIES SHALE, PALEOZOIC LIMESTONE, SHALE AND QUARTZ
Type of structure Regional
Structure name MESOZOIC SANDSTONE, SHALE AND IMPURE LIMESTONE
Type of structure Regional
Structure name LATE CRET ANDESITIC BRECCIAS, TUFFS, AND LAVAS
Type of structure Regional
Structure name INTRUDED BY QUARTZ MONZONITE AND APLITE

Ore body information

  • General form IRREGULARLY TABULAR AND ALSO PIPE-LIKE
    Strike N 10 DEG W
    Dip 40 DEG E
    Length 152.4M
    Depth to top 0M
    Depth to bottom 701.04M

Controls for ore emplacement

  • Pilgrim Dolomite-Red Lion Formation Contact And Bedding Planes 40, 80, 160, And 360 Ft. Beneath This Contact.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Medium
Significant Yes
Discovery year 1875
Year of first production 1875

Mining district

District name Elkhorn Mining District

Ownership information

  • Type Owner
    Owner Walker, Laura
  • Type Owner
    Owner Youlden, Charles And Martha
  • Type Owner
    Owner Henningsen, Anker
  • Type Operator
    Owner Development Operating Co.

Production statistics

  • Year 1957
    Period 1875-1957
    Material Cu
    Ore mined 464988.87mt
    Accuracy Accurate
  • Year 1957
    Period 1875-1957
    Material Au
    Ore mined 2170867.45g
    Accuracy Accurate
  • Year 1957
    Period 1875-1957
    Material Zn
    Ore mined 1453504.54mt
    Accuracy Accurate
  • Year 1957
    Period 1875-1957
    Material Pb
    Ore mined 7419570.51mt
    Accuracy Accurate
  • Year 1957
    Period 1875-1957
    Material Ag
    Ore mined 468249065.4g
    Accuracy Accurate
  • Year 1957
    Period 1875-1957
    Material ore
    Ore mined 800779.33mt
    Accuracy Accurate

Comments on the reserve resource information

  • IF ADDITIONAL ORE SHOOTS CAN BE FOUND UNDER OTHER ANTICLINAL FLEXURES ALONG SLATE-DOLOMITE CONTACT, POTENTIAL RESOURCES COULD EQUAL PAST PRODUCTION

Comments on the workings information

  • MINE DEVELOPED FROM A MAIN SHAFT INCLINED 30 DEG-50 DEG FROM WHICH 23 LEVELS WERE DRIVEN AT SLOPE INTERVALS OF ABOUT 100 FT. AND VERTICAL SOPHIA SHAFT FROM WHICH LEVELS WERE RUN AT DEPTHS OF 65 AND 110 FT.

Comments on development

  • THE ORE AGAINST THE SLATE CONTACT IS QUARTZOSE BUT WITHIN THE DOLMITE

    IS A SILVER-LEAD SMELTING ORE.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit Merged data from Deposit ID's 10008099 (Elkhorn Mine), 10069273 (Elkhorn Jefferson Co.), 10048811 (Elkhorn), 10269978 (Elkhorn), 10245604 (Elkhorn Mine), and 10008981 (Elkhorn)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1974 Puffett, Willard P. U.S. Geological Survey

Beyond USGS

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

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