Description
General Mining & Finance Corp. Ltd.
Commodities
PrimaryChromium
TertiaryPGE, Iron, Silica
Commodity typeM
Deposit
Model2: Bushveld Cr
Deposit sizeL
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 (Transvall 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 Materials Only.
Economic & production
Development statusPast Producer
First production1935
Identification
Deposit ID10079230
MRDS IDW028281
RegionAF
Data scoreA
Coordinates-24.78001, 27.28477
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., CHRIST, E.M., AND SHEEHAN, L.E.JR.; 1976.MARKETING DIRECTORY, NO.2, FERROUS AND NONFERROUS METALS AND MINERALS IN SOUTH AFRICA; MINERALS BUREAU, DEPARTMENTOF MINES; 1977.MINING MAGAZINE, JANUARY, 1987.SAUNDERS AND TAYLOR, 1975, CHROMIUM AND FERROCHROMIUM IN SOUTH AFRICA: SAUNDERS AND TAYLOR STOCK AND SHAREBROKERS, NOVEMBER 1975.KUPFERBURGER, W., AND LOMBAARD, B.V., 1937, THE CHROMITE DEPOSITS OF THE BUSHVELD IGNEOUS COMPLEX: GEOLOGICAL SURVEY,DEPARTMENT OF MINES.REPORTERS ESTIMATES BASED ON INDUSTRY INDICATORS AND OFFICIAL (MINERALS BUREAU) COUNTRY TOTALS ; REPORTER'S ESTIMATES BASED ON INDUSTRY INDICATORS AND OFFICIAL (MINERALS BUREAU) COUNTRY TOTALS.