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  3. Mineral Resource Data System (MRDS)

Monitor Mine

Past Producer in Lawrence county in South Dakota, United States with commodities Gold, Silver
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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. Economic information about the deposit and operations
  13. Mining district
  14. Ownership information
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10055514
MRDS ID SD02076
Record type Site
Current site name Monitor Mine

Geographic coordinates

Geographic coordinates: -103.76168, 44.35968 (WGS84)
Elevation 1622
Relative position 1 MILE NORTHEAST OF LEAD, SOUTH DAKOTA

Site location context

Political divisions (FIPS codes)

Lawrence(county)

South Dakota(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Lead(quadrangle 1:24,000 scale)

Rapid City(quadrangle 1:100,000 scale)

Rapid City(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Belle Fourche(hydrologic unit)

Belle Fourche(hydrologic accounting unit)

Cheyenne(hydrologic subregion)

Missouri(hydrologic region)

Geographic areas

Country State County
United States South Dakota Lawrence

Public Land Survey System information

Meridian Township Range Section Fraction State
Black Hills 005N 003E 28 South Dakota

Comments on the location information

  • S 1/2, CENTRAL

Commodities

Commodity Importance
Gold Primary
Silver Primary

Materials information

Materials Type of material
Gold Ore
Silver Ore

Alteration

  • (Local) Conglomerate Was Cemented By Pyrite, Which Was Altered To Iron Oxides.

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Late Cambrian
  • Host or associated Associated
    Rock type Plutonic Rock
    Rock unit name Porphyry Intrusions, Rhyolite
    Rock description Porphyry Intrusions, Rhyolite

Nearby scientific data

(1) Rhyolitic Intrusive Rocks
ListMap

Economic information

Ore body information

  • General form IRREGULAR BLANKET

Comments on the geologic information

  • AGE OF MINERALIZATION CONTROVERSIAL, PREC VS. TERT

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Lead District

Ownership information

  • Type Owner-Operator
    Owner Homestake Mining Co.

Workings at the site

  • Type of workings Underground
    Overall width 30.48M

Comments on the workings information

  • MINE WAS DEVELOPED BY A TUNNEL BEGINNING IN SCHIST BUT EXTENDING SOUTHEAST INTO THE ORE BODY. STOPES, 100 FEET WIDE AND 20 FEET HIGH.

Reference information

Bibliographic references

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1979 Barari, Rachel A. U.S. Geological Survey

Beyond USGS

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

Operator history (post-MRDS)

MRDS records operators as of each record's last update (≤ 2019). Some of the operators listed here have since changed hands or dissolved:

  • Homestake Mining Co. — acquired by Subsidiary of Barrick Gold (2001)
    Operator of the historic Homestake Mine in South Dakota; acquired by Barrick Gold in 2001.

Curated by qvyshift.com from publicly-reported M&A activity (SEC filings, press releases, USGS Mineral Yearbooks). Not authoritative — verify against primary sources before relying on it. The MSHA panel above is the current authoritative source for actively-permitted mines.

External references

Maps centered on this site