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  3. Mineral Resource Data System (MRDS)

Grootboom Project

Prospect in Mpumalanga, South Africa with commodities PGE, Nickel, Copper, Chromium
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Geologic structures
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Mineral rights holdings
  13. Ownership information
  14. Reserves and resources
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10400411
Record type Site
Current site name Grootboom Project

Geographic coordinates

Geographic coordinates: 30.189, -24.792 (WGS84)

Site location context

Political divisions (FIPS codes)

Mpumalanga(province)

South Africa(country)

Africa(continent)

Land(continent)

Geographic areas

Country State
South Africa Mpumalanga

Commodities

Commodity Importance
PGE Critical Primary
Nickel Critical Secondary
Copper Secondary
Chromium Critical Secondary

Materials information

Materials Type of material
Chromite Ore

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Anorthosite
    Rock unit name Rustenburg Layered Suite, Upper Critical Zone
    Stratigraphic age (youngest) Proterozoic
    Stratigraphic age (oldest) Proterozoic
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro > Norite
    Rock unit name Rustenburg Layered Suite, Upper Critical Zone
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Pyroxenite
    Rock unit name Rustenburg Layered Suite, Upper Critical Zone
    Stratigraphic age (youngest) Proterozoic
    Stratigraphic age (oldest) Proterozoic

Nearby scientific data

(1) 30.189, -24.792
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Economic information

Geologic structures

Type of structure Local
Structure name Steelport fault

Ore body information

  • Name Merensky Reef
    General form Tabular
  • Name UG2
    General form Tabular

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Prospect
Significant Yes

Mineral rights holdings

Type of mineral rights Unknown

Ownership information

  • Type Owner
    Owner Platmin Limited

Reserves and resources

  • Type In-situ
    Name Grootboom Tailings
    Estimate year 2009
    Measured 1075000metric tons
    Remarks The resource values are provided for each part of the Grootboom project, so they all are the best record
    Commodity Subtype Grade units Group Importance Year
    Nickel Ni 0.098 wt-pct Nickel Secondary 2009
    PGE 5 PGE+Au 3.87 g/mt PGE Primary 2009
    Copper Cu 0.011 wt-pct Copper Secondary 2009
  • Type In-situ
    Name Annex Grootboom+Grootboom
    Estimate year 2009
    Indicated 17692000metric tons
    Inferred 2787000metric tons
    Remarks Combined resources for the two farms included in this project. Inferred resource grade is 3.08 g/t and only includes Grootboom farm. Also, Ni = 1,762 ppm and Cu = 789 ppm on Grootboom farm inferred resources.
    Commodity Subtype Grade units Group Importance Year
    PGE 5PGE+Au 4.59 g/mt PGE Primary 2009

Comments on the reserve resource information

  • Grootboom Tailings Dam (GTD) individual PGE+Au element grades are: Pt=1.15, Pd=0.77, Rh=0.39, Au=0.01, Ir=0.28, Ru=1.26.
  • From Reference 1: According to Samancor Limited (1996) about 98.1% of the material on the Grootboom Tailings Dam came from chromite mining on Grootboom 336KT farm, the rest from Annex Grootboom 335KT farm. Using amount added to the GTD since 1996, the calculated split is 89.4% from Grootboom 336KT, the rest from Annex Grootboom.

Reference information

Bibliographic references

  • Reserve-Resource

    Harper, Fiona, and de Wit, D.R. (compilers), and Clay, A.N. (qualified person), 2009, National Instrument 43-101 technical report for the Grootboom Project, Mpumalanga Province, South Africa for Platmin Limited: Venmyn Rand (Pty) Ltd., South Africa, 79 p.

  • Deposit

    Harper, Fiona, and de Wit, D.R. (compilers), and Clay, A.N. (qualified person), 2009, National Instrument 43-101 technical report for the Grootboom Project, Mpumalanga Province, South Africa for Platmin Limited: Venmyn Rand (Pty) Ltd., South Africa, 79 p.

Reporter information

Type Date Name Affiliation Comment
Reporter 19-JUL-10 Causey, J. Douglas U.S. Geological Survey

Beyond USGS

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

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