Commodities
PrimaryChromium
TertiaryPGE, Iron, Silica
Commodity typeM
Deposit
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
Other materialsChalcopyrite, 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 And Thus Present Localized (Albeit Moderate) Changes In The Dip.
Tectonic settingPlatform, Anorogenic
AlterationSurface And Near-Surface Alteration Of Feldspathic Material Only.
Economic & production
Development statusProducer
Identification
Deposit ID10079237
MRDS IDW028410
RegionAF
Data scoreA
Coordinates-24.61333, 30.15141
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.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 .WAGNER, 1925, PLATINUM DEPOSITS IN THE WESTERN PART OF THE LYDENBURG DISTRICT: SOUTH AFRICA JOURNAL INDUSTRIES BULLETIN 102, P. 14.DEYOUNG 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 & TAYLOR, STOCK AND SHARE BROKERS; JOHANNESBURG; NOVEMBER 1975 . "THE CHROMITE DEPOSITS OF THE BUSHVELD IGNEOUS COMPLEX"; GEOLOGICAL SURVEY, DEPARTMENT OF MINES; KUPFERBURGER, W. AND LOMBAARD, B. V.; 1937ISMIREPORTERS ESTIMATES BASED ON INDUSTRY INDICATORS AND OFFICIAL (MINERALS BUREAU) COUNTRY TOTALS ; REPORTER'S ESTIMATES BASED ON INDUSTRY INDICATORS AND OFFICIAL (MINERALS BUREAU) COUNTRY TOTALS ; REPORTERS ESTIMATES BASED ON INDUSTRY INDICATORS AND OFFICIAL (MINERALS BUREAU) COUNTRY TOTALS. ; REPORTER'S ESTIMATE BASED ON INDUSTRY INDICATORS AND OFFICIAL (MINERALS BUREAU) COUNTRY TOTALS