Description
Dr. R. Krahmann, West Witwatersrand Areas Ltd
Commodities
PrimaryGold
SecondaryPGE, Silver
TertiaryUranium, Sulfur-Pyrite
Commodity typeM
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)-Quartzite, 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 production1972
Discovery year1932
Identification
Deposit ID10079046
MRDS IDW027861
RegionAF
Data scoreA
Coordinates-26.3966, 27.48479
References
MINERAL RESOURCES OF THE REPUBLIC OF SOUTH AFRICA, FIFTH EDITION, HANDBOOK 7 ; 1976MINERALS RESOURCES OF SOUTH-CENTRAL AFRICA; PELLETIER, R.A.; 1964GOLD FIELDS OF SOUTH AFRICA LIMITED, ANNUAL REPORTS 1972 - 1976EAST DRIEFONTEIN, 1976, ANNUAL REPORT.EAST DRIEFONTEIN, 1975, ANNUAL REPORT.EAST DRIEFONTEIN, 1974, ANNUAL REPORT.EAST DRIEFONTEIN, 1973, ANNUAL REPORT.EAST DRIEFONTEIN, 1972, ANNUAL REPORT.IVOR JONES, ROY & COMPANY, INC.,SOUTH AFRICAN GOLD SHARES: JOHANNESBURG, IVOR JONES, ROY & COMPANY, INC.MINING JOURNAL, 1975, V. 19, NO. 1, MAY 1975.CHAMBER OF MINES OF SOUTH AFRICA ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1984 ; 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-ANALYSIS OF WORKING RESULTS-1982 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1983 ; 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