Description
Dr. R. Krahmann, West Witwatersrand Areas Ltd
Commodities
PrimaryGold
SecondarySulfur-Pyrite, Sulfur, Sulfuric Acid, PGE, Silver
TertiaryUranium
Commodity typeB
Deposit
Deposit sizeL
WorkingsUnderground
Orebody formTABULAR/BLANKET
Ore controlGentle Uplift Of Continental Mass; Erosion; Peneplanation; Folding; Faulting; Volcanicity; Dike Injection And Build-Up Of Younger Sediments
Geology
Host rockQuartzite,Shale,Conglomerate · Transvaal System Shales (Pretoria Series), Dolomite (Dolomite Series) And Conglomerates (Black Reef Series);Witwatersrand System (Upper Division)-Quartzites, Shales, Grits, Conglomerates And Carbon Granules
Associated rockVolcanic Rock (Aphanitic) · Ventersdorp System-Lava
StructureUnique Continuity Of Gold-Bearing Horizons Over Extended Area, Though Well Marked By Dikes, Faulting, Early Erosion And Redeposition Of Overlying Sediments. The Ventersdorp Contact Reef Unconformably Overlies The Carbon Leader Reef., Gentle Dip With Faulting Locally, And Minor Folding. Intrusive Dikes Penetrate And Dilute Minable Ore Horizons. Overlying Lavas And Dolomites Are Massive.
Tectonic settingPlatform
AlterationNone
Economic & production
Development statusProducer
First production1954
Discovery year1932
Identification
Deposit ID10079048
MRDS IDW027863
RegionAF
Data scoreB
Coordinates-26.3966, 27.30146
References
MINERAL RESOURCES OF THE REPUBLIC OF SOUTH AFRICA, FIFTH EDITION, HANDBOOK 7 ; 1976MINERAL RESOURCES OF SOUTH-CENTRAL AFRICA; PELLETIER, R.A.; 1964GOLD FIELDS OF SOUTH AFRICA LIMITED, ANNUAL REPORTS 1974 - 1977DOORNFONTEIN ANNUAL REPORT, 1977.DOORNFONTEIN ANNUAL REPORT, 1976.DOORNFONTEIN ANNUAL REPORT,1975.DOORNFONTEIN ANNUAL REPORT, 1974.IVOR JONES, ROY & COMPANY, INC., 1975, SOUTH AFRICAN GOLD SHARES: JOHANNESBURG, IVOR JONES, ROY & COMPANY, INC.CHAMBER OF MINES OF SOUTH AFRICA ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1985 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS-1986 ; CHAMBER OF MINES OF SOUTH AFRICA - ANALYSIS OF WORKING RESULTS - 1981 ; CHAMBER OF MINES OF SOUTH AFRICA - ANALYSIS OF WORKING RESULTS-1982 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1984 ; ANALYSIS OF WORKING RESULTS, CHAMBER OF MINES OF SOUTH AFRICA. JANUARY - DECEMBER 1979 ; ANALYSES OF WORKING RESULTS, CHAMBER OF MINES OF SOUTH AFRICA - 1980 ; ANALYSIS OF WORKING RESULTS, CHAMBER OF MINES OF SOUTH AFRICA. JANUARY - DECEMBER 1978