Commodities
PrimaryChromium
TertiaryIron, Silica, PGE
Commodity typeM
Deposit
Model2: Bushveld Cr
Deposit sizeM
WorkingsUnderground
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
Geology
Host rockPyroxenite
Associated rockMafic Intrusive Rock · Bushveld Igneous Complex, Schilpadnest Subsuite
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 Area'S Upper, Middle And Lower Chrome Groups (Underlying The Merensky Reef) Are Extraordinarily Uniform As To Composition And Thickness. Faults And Folds, Locally, Are Of Minor Importance Only. Seam Undulations, However, Are Common And Thus Present Localized (Albeit Moderate) Changes In The Dip.
Tectonic settingPlatform
AlterationSurface And Near-Surface Alteration Of Feldspathic Materials Only.
Economic & production
Development statusPast Producer
Discovery year1920
Identification
Deposit ID10089696
MRDS IDW028414
RegionAF
Data scoreA
Coordinates-25.74663, 27.25145
References
SRC.REF: FERROUS AND NONFERROUS MINES AND WORKS IN SOUTH AFRICA; MINERALS BUREAU; DIRECTORY NO. 3/79MINERAL RESOURCES OF THE REPUBLIC OF SOUTH AFRICA, FIFTH EDITION, HANDBOOK 7, GEOLOGICAL SURVEY, DEPARTMENT OF MINES; 1976.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 .MARKETING DIRECTORY, NO. 2 , FERROUS AND NONFERROUS METALS AND MINERALS IN SOUTH AFRICA; MINERALS BUREAU, DEPARTMENT OF MINES; 1977 .OPERATING MINES IN THE REPUBLIC OF SOUTH AFRICA; MINERALS BUREAU, DEPARTMENT OF MINES DIRECTORY NO. 1/79 ; 1979 .DEYOUNG AND OTHERS, 1984, INTERNATIONAL STRATEGIC MINERALS INVENTORY SUMMARY REPORT-- CHROMIUM: U.S. GEOLOGICAL SURVEY CIRCULAR 930-B, 41 P."THE CHROMITE DEPOSITS IN THE RUSTENBURG AREA"; DEPARTMENT OF MINES, GEOLOGICAL SURVEY; BULLETIN 27 ; FOURIE, G. P.; 1959 . "THE CHROMITE DEPOSITS OF THE BUSHVELD IGNEOUS COMPLEX", DEPARTMENT OF MINES, GEOLOGICAL SURVEY; KUPFERBURGER, W. AND LOMBAARD, B. V. 1937ISMIREPORTER'S ESTIMATES BASED ON INDUSTRY INDICATORS AND OFFICIAL (MINERALS BUREAU) COUNTRY TOTALS. ; REPORTERS ESTIMATES BASED ON INDUSTRY INDICATORS AND OFFICIAL (MINERALS BUREAU) COUNTRY TOTALS.