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Shamrock Mine

Past Producer in Sanders county in Montana, United States with commodities Gold, Silver, Lead
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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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Economic information about the deposit and operations
  12. Mining district
  13. Land status
  14. Ownership information
  15. Production statistics
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10010261
MRDS ID D003851
Record type Site
Current site name Shamrock Mine

Geographic coordinates

Geographic coordinates: -115.5099, 47.55265 (WGS84)
Elevation 1036
Relative position 4 3/4 MI SE OF DRIVEWAY PK

Site location context

Political divisions (FIPS codes)

Sanders(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Driveway Peak(quadrangle 1:24,000 scale)

Thompson Falls(quadrangle 1:100,000 scale)

Wallace(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Clark Fork(hydrologic unit)

Pend Oreille(hydrologic accounting unit)

Kootenai-Pend Oreille-Spokane(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Lolo 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 Sanders

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 021N 031W 25 N2 Montana

Comments on the location information

  • ON A RIDGE WEST OF SHAMROCK GULCH. A TRIBUTARY GULCH TO PROSPECT CREEK.

Commodities

Commodity Importance
Gold Primary
Silver Primary
Lead Secondary

Materials information

Materials Type of material
Quartz Gangue

Analytical data

Result 1961 ASSAY OF SELECTED DUMP QUARTZ REVEALED A CONTENT OF 0.04 OZ/TON AU AND 2.51 OZ/TON AG

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
    Rock unit name Ravalli Group
    Rock description Ravalli Group
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic

Nearby scientific data

(1) -115.5099, 47.55265
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description N - S Trending Anticline

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1900
Year of first production 1908

Mining district

District name Prospect Creek District

Land status

Ownership category National Forest

Ownership information

  • Type Operator
    Owner Florence Mine And Developing Co.

Production statistics

  • Year 1908
    Material ORE
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Lead Lead 0wt-pct
    Major Ore Silver Silver 17g/mt
    Major Ore Gold Gold 2g/mt

Workings at the site

  • Type of workings Underground
    Overall length 979.32M

Comments on the workings information

  • 1908 PUBLICATION STATES THAT THERE WERE THREE TUNNELS, 285 FT, 1116 FT & 1812 FT IN LENGTH. AS OF 1961 ALL WORKINGS WERE CAVED.

Comments on development

  • NO REPORTS ON DEVELOPMENT AFTER 1912 CAN BE FOUND. 1908 PUBLICATION STATES THAT THERE WERE 11 CLAIMS. ; ECON.COM: 5 STAMP MILL ERECTED IN 1908 .

Reference information

Bibliographic references

  • Analytical Data

    SRC.REF: CROWLEY, F. A., 1963 : MONTANA BUREAU OF MINES AND GEOLOGY BULL. 34 , P. 34 - 35

  • Deposit

    CROWLEY, F. A., 1963 , MINES AND MINERAL DEPOSITS (EXCEPT FUELS) SANDERS COUNTY, MONTANA: MONTANA BUREAU OF MINES AND GEOLOGY, BULL. 34 , PP. 34 - 35

  • Production

    CROWLEY, F. A., 1963 : MONTANA BUREAU OF MINES AND GEOLOGY BULL. 34 , P. 34 .

General comments

Subject category Comment text
Deposit DUMPS CONTAINED A FEW SCATTERED PIECES OF IRON-STAINED QUARTZ, BUT NO SULFIDE MINERALS COULD BE SEEN.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1979 Rojstaczer, Stuart A. U.S. Geological Survey

Beyond USGS

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

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