Commodities
PrimaryChromium
SecondaryPGE, Iron, Silica
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 Succesive Eruptions As Sheet-Like Masses Into The Pretoria Series Volcanics (Transvaal System), Andin 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 rockPyroxenite
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 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 Andthus Present Localized Calbeit Moderate) Changes In The Dip.
Tectonic settingPlatform, Anorogenic
AlterationSurface And Near-Surface Alteration Of Feldspathic Materials Only
Economic & production
Development statusProducer
First production1937
Identification
Deposit ID10079229
MRDS IDW028280
RegionAF
Data scoreA
Coordinates-24.52999, 30.16807
References
MINERAL 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.U.S. 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"CHROMITE PRODUCTION FROM THE BUSHVELD COMPLEX AND ITS RELATIONSHIP TO THE FERROCHROME INDUSTRY"; UNIVERSITY OF THE WITWATERSRAND, BUREAU FOR MINERALS STUDIES; JOHANNESBURG; BUCHANAN, D.L.; 1978DEYOUNG AND OTHERS, 1984, INTERNATIONAL STRATEGIC MINERALS INVENTORY SUMMARY REPORT-- CHROMIUM: U.S. GEOLOGICAL SURVEY CIRCULAR 930-B, 41 P."CHROMIUM AND FERROCHROMIUM IN SOUTH AFRICA"; SAUNDERS AND TAYLOR, STOCK AND SHARE BROKERS; JOHANNESBURG; NOVEMBER1975. "THE CHROMITE DEPOSITS OF THE BUSHVELD IGNEOUS COMPLEX";GEOLOGICAL SURVEY, DEPARTMENT OF MINES; KUPFERBURGER, W. AND LOMBAARD, B.V.; 1937REPORTERS ESTIMATES BASED ON INDUSTRY INDICATORS AND OFFICIAL (MINERALS BUREAU) COUNTRY TOTALS. ; REPORTER'S ESTIMATES BASED ON INDUSTRY INDICATORS AND OFFICIAL (MINERALS BUREAU) COUNTRY TOTALS