Commodities
PrimaryGold
SecondaryIridium, Rhodium, Ruthenium, Silver, Uranium, PGE, Platinum, Osmium
Commodity typeM
Deposit
Model193: Quartz pebble conglomerate Au-U (BC name is Paleoplacer U-Au-PGE-Sn-Ti
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
Materials
Ore mineralsGold, Iridium, Sperrylite
Geology
Host rockQuartzite,Shale,Conglomerate · Upper Elsburg Conglomerates And Quartzites;Karroo System Conglomerates And Shales
Associated rockVolcanic Rock (Aphanitic) · Ventersdorp System-Lava
StructureUnique Continuity Of Gold - Bearing Horizons Over Extended Area, Though Well Marked By Faulting, Folding And (Locally) Erosion And Redeposition Of Overlying Sediments., Gentle Dip Regionally, With Folds And Faults Locally. Overlying Lavas, Quartzites And Conglomerates Are Massive.
Tectonic settingPlatform
AlterationNone
Economic & production
Development statusProducer
First production1951
Identification
Deposit ID10071445
MRDS IDW014842
Alternate namesWelkom
RegionAF
Data scoreA
Coordinates-27.96322, 26.75149
References
ANGLO AMERICAN CORPORATION OF SOUTH AFRICA LIMITED; ANNUAL REPORTS: 1974 & 1975MINERAL RESOURCES OF SOUTH - CENTRAL AFRICA; PELLETIER, R. A.; 1964"THE ORANGE FREE STATE GOLDFIELD" (ANGLO AMERICAN CORPORATION OF SOUTH AFRICA LIMITED); 1960WELKOM GOLD MINING COMPANY LIMITED; ANNUAL REPORT, 1975MERTIE, 1969, ECONOMIC GEOLOGY OF PLATINUM METALS: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 630, P. 45-48.COUSINS, 1973, PLATINOIDS IN THE WITWATERSRAND SYSTEM: JOURNAL SOUTH AFRICA INSTITUTE OF MINING AND METALLURGY, V. 73, NO. 6, P. 3-5.FEATHER, 1976, MINERALOGY OF THE PLATINUM-GROUP MINERALS IN THE WITWATERSRAND: ECONOMIC GEOLOGY, V. 71, NO. 7.WAGNER, 1929, PLATINUM DEPOSITS AND MINES OF SOUTH AFRICA: STRUIK (PTY) LTD., CAPETOWN 1973, P. 32-40.MINING JOURNAL, 1977, V. 288.SOUTH AFRICAN GOLD SHARES; IVOR JONES, ROY & CO., INC., JOHANNESBURG; 1975 MINING JOURNAL QUARTERLY REVIEW OF SOUTH AFRICAN GOLD SHARES, VOL. 19, NO. 1; MAY 197ANALYSES OF WORKING RESULTS, CHAMBER OF MINES OF SOUH AFRICA, 1980 ; 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 ; ANALYSIS OF WORKING RESULTS, CHAMBER OF MINES OF SOUTH AFRICA, JANUARY-DECEMBER 1977