Tarkwa

Producer in Ashanti, Ghana with commodity Gold
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Ownership information
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10081074
MRDS ID W032773
Record type Site
Current site name Tarkwa

Geographic coordinates

Geographic coordinates: -1.98189, 5.31787 (WGS84)
Relative position 200 KM WSW OF ACCRA

Site location context

Political divisions (FIPS codes)

Ashanti(province)

Ghana(country)

Africa(continent)

Land(continent)

Geographic areas

Country State
Ghana Ashanti

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Clay Gangue
Mica Gangue
Quartz Gangue

Alteration

  • (Local) Laterization

Analytical data

Result AU IS FREE-MILLING AND VERY FINE.

Mineral occurrence model information

Model code 193
USGS model code 29a
Deposit model name Quartz pebble conglomerate Au-U (BC name is Paleoplacer U-Au-PGE-Sn-Ti

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Phyllite
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -1.98189, 5.31787

Economic information

Geologic structures

Type of structure Regional
Structure description N30e

Ore body information

  • General form LENSES

Controls for ore emplacement

  • Shear Zones

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Boguso-Prestea-Tarkwa District

Ownership information

  • Type Owner-Operator
    Owner State Gold Mining Corp.

Comments on the workings information

  • 3 SHAFTS, OPEN STOPING

Comments on development

  • MILL.CAP: 900 ; ECON.YEAR: 1978 ; ECON.COM: CYANIDATION. 220 OZ PER DAY, 1976-77.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit SOME OXIDIZED ORES HAVE BEEN CONCENTRATED BY CHEMICAL AND MECHANICAL WEATHERING OF THE AU-BEARING VEINS. VEINS ARE CLOSE TO SURFACE AND OCCUR IN THE RESIDUAL SUBSOIL DOWN TO THE WATER TABLE (30-80M).

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1980 Gassaway, Judith S. U.S. Geological Survey
Updater 01-MAR-1988 Orris, Greta J. U.S. Geological Survey

Beyond USGS

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