Beckman Lode

Occurrence in Pennington county in South Dakota, United States with commodities Gold, Silver
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. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10055556
MRDS ID SD02135
Record type Site
Current site name Beckman Lode
Alternate or previous names General Custer, Gold Coin Groups

Geographic coordinates

Geographic coordinates: -103.55778, 43.91107 (WGS84)
Elevation 1582
Relative position 1 MILE NORTHWEST OF KEYSTONE, S.D. ALONG THE CONTINUATION OF THE KEYSTONE "GOLD BELT".

Site location context

Political divisions (FIPS codes)

Pennington(county)

South Dakota(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Hill City(quadrangle 1:24,000 scale)

Mount Rushmore(quadrangle 1:100,000 scale)

Hot Springs(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Cheyenne-Spring(hydrologic unit)

Cheyenne(hydrologic accounting unit)

Cheyenne(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Black Hills 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 South Dakota Pennington

Public Land Survey System information

Meridian Township Range Section Fraction State
Black Hills 002S 005E 05 South Dakota

Comments on the location information

  • NW 1/4 , NW 1/4

Commodities

Commodity Importance
Gold Primary
Silver Primary

Materials information

Materials Type of material
Gold Ore
Silver Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Diorite Intrusion
    Rock description Diorite Intrusion
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock
    Rock unit name Metamorphic Rocks
    Rock description Metamorphic Rocks

Nearby scientific data

(1) Metagraywacke

Economic information

Geologic structures

Type of structure Local
Structure description Extensive Cross Fracturing

Controls for ore emplacement

  • Shear Zone Or Keystone Gold Belt

Comments on the geologic information

  • NORTHWEST OF THE BECKMAN GROUP IS A LARGE DIORITE INTRUSION, WHICH SPLITS THE SHEAR ZONE AND MAY EXPLAIN THE LACK OF DEFINITION OF THE ZONE FURTHER SOUTH.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Keystone District

Land status

Ownership category National Forest
Area name Black Hills National Forest

Comments on the workings information

  • PROSPECTED BY SHALLOW SHAFTS, OPENCUTS, AND SHORT ADITS. MOST OPENINGS SHOW SOME GOLD.

Comments on development

  • THE BECKMAN, GENERAL CUSTER, AND GOLD COIN GROUPS LIE ALONG THE CONTINUATION OF THE KEYSTONE "GOLD BELT" ; ECON.COM: A FEW ISOLATED STRINGERS ARE HIGH GRADE

Reference information

Bibliographic references

  • Deposit

    US BUREAU OF MINES, 1955 , BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2 , BUREAU OF MINES INFORMATION CIRCULAR 7707

General comments

Subject category Comment text
Deposit THE KEYSTONE GOLD BELT IS NOT WELL DEFINED ON THE BECKMAN GROUP

Reporter information

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

Beyond USGS

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