Commodities
PrimaryChromium
SecondaryPGE, Iron, Silica
Commodity typeM
Deposit
Deposit sizeM
Orebody formTABULAR/BLANKET
Ore controlThe Various Components Of The Bushveld Igneous Complex Have Been Emplaced In Successive Eruptions As Sheet-Like Masses Into The Pretoria Series Volcanics (Transvaal System), And In Some Cases Into One Another, Dipping Inward Toward The Center Giving A Cone-Like Structure To The Complex As A Whole.
Materials
Ore mineralsChromite, Magnetite
GangueAnorthosite, Chalcopyrite, Pentlandite, Pyrrhotite
Geology
Host rockGabbro
Associated rockMafic Intrusive Rock · Bushveld Igneous Complex (Including The Overlying Merensky Reef)
StructureInward-Dipping Cone-Like Structure; Folding And Faulting (Including Low-Angle Thrusting) Exists, But Are Of Minor Importance; Erosion, Peneplanation And Build-Up Of Younger Sediments Are Basic Criteria Regionally., The Marico Extension Of The Bushveld Igneous Complex Is A Shallow Kidney-Shaped Syncline Occuring In Pyroxenite And Harzburgite. Five Chromite Seams Lie Concentrically Around The Basin And Dip Toward The Center At 2.7 Degrees. Three Seams Are Thought To Be Continuous, And Two Intermittent. Faults And Folds, Locally, Are Of Minor Importance Only.
Tectonic settingPlatform
AlterationSurface And Near-Surface Alteration Of Feldspathic Materials Only.
Economic & production
Development statusProducer
Identification
Deposit ID10089692
MRDS IDW028402
RegionAF
Data scoreB
Coordinates-25.08, 26.25146
References
SRC.REF: FERROUS AND NONFERROUS MINES AND WORKS IN SOUTH AFRICA; MINERALS BUREAU; DIRECTORY NO. 3/79FERROUS AND NONFERROUS MINES AND WORKS IN SOUTH AFRICA; MINERALS BUREAU, DEPARTMENT OF MINES, DIRECTORY NO. 3/79; 1979 .OPERATING MINES IN THE REPUBLIC OF SOUTH AFRICA: MINERALS BUREAU, DEPARTMENT OF MINES; DIRECTORY NO. 1/79; 1979 .CHROMITE MINES AND RESOURCES IN THE REPUBLIC OF SOUTH AFRICA; UNIVERSITY OF IDAHO FOR M.A.S., US BUREAU OF MINES; SIEMS, P., CRIST, E. M., AND SHEEHAN, L. E. JR.; 1976 .MINERAL RESOURCES OF THE REPUBLIC OF SOUTH AFRICA, FIFTH EDITION, HANDBOOK 7, GEOLOGICAL SURVEY, DEPARTMENT OF MINES; 197REPORTER'S ESTIMATES BASED ON INDUSTRY INDICATORS AND OFFICIAL (MINERALS BUREAU) COUNTRY TOTALS. ; REPORTERS ESTIMATES BASED ON INDUSTRY INDICATORS AND OFFICIAL (MINERALS BUREAU) COUNTRY TOTALS