Description
Ucar Chrome Co. S.A. (Pty) Ltd. (Union Carbide Corp., New York)
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 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 Material Only.
Economic & production
Development statusPast Producer
First production1974
Identification
Deposit ID10079233
MRDS IDW028404
RegionAF
Data scoreA
Coordinates-24.26335, 29.88474
References
SRC.REF: FERROUS AND NONFERROUS MINES AND WORKS IN SOUTH AFRICA; DEPARTMENT OF MINES, MINERALS BUREAU; DIRECTORY NO. 3/79; 1979MINERAL 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 .OPERATING MINES IN THE REPUBLIC OF SOUTH AFRICA; MINERALS BUREAU, DEPARTMENT OF MINES; DIRECTORY NO. 1/79; 1979 .FERROUS AND NONFERROUS MINES AND WORKS IN SOUTH AFRICA; DEPARTMENT OF MINES, MINERALS BUREAU; DIRECTORY NO. 3/79; 1979 ."CHROMITE DEPOSITS OF THE BUSHVELD IGNEOUS COMPLEX"; GEOLOGICAL SURVEY, DEPARTMENT OF MINES; KUPFERBURGER, W., AND LOMBAARD, B. V.; 1937REPORTER'S ESTIMATES BASED ON INDUSTRY INDICATORS AND OFFICIAL (MINERALS BUREAU) COUNTRY TOTALS.