Description
Sir J.B. Robinson
Commodities
PrimaryGold, Uranium
SecondaryPlatinum, Osmium, Iridium, Rhodium, Ruthenium, Silver, PGE
TertiarySulfur, Sulfuric Acid, Sulfur-Pyrite
Commodity typeB
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.
Geology
Host rockQuartzite,Shale,Conglomerate · Transvaal System--Dolomite;Witwatersrand System (Upper Division)-Quartzite, Shales, Grits And Conglomerates
Associated rockVolcanic Rock (Aphanitic) · Ventersdorp System-Lava
StructureUnique Continuity Of Gold/Uranium-Bearing Horizons Over Extended Area, Though Well Marked By Folding, Faulting And (Locally) Erosion And Redeposition Of Overlying Conformable Sediments., Flat Dipping Beds Throughout Local Area, But Strike Swings Through 180 Degree Turn. Intruded Dikes (Frequently Water-Bearing) Are Abundant. Faulting Severe. Overlying Lavas And Dolomites Massive.
Tectonic settingPlatform
AlterationNone
Economic & production
Development statusProducer
First production1974
Discovery year1887
Identification
Deposit ID10089664
MRDS IDW027870
RegionAF
Data scoreA
Coordinates-26.24661, 27.73478
References
MINERALS RESOURCES OF THE REPUBLIC OF SOUTH AFRICA, FIFTH EDITION; HANDBOOK 7 ; 1976MINERAL RESOURCES OF SOUTH-CENTRAL AFRICA; PELLETIER, R.A.; 1964MERTIE, 1969, ECONOMIC GEOLOGY OF THE PLATINUM METALS: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 630, P. 45-48.COUSINS, 1973, PLATINOIDS IN THE WITWATERSRAND SYSTEM: JOURNAL SOUTH AFRICA INSTITUTE MINING AND METALLURGY, V. 73, NO. 6, P. 3-5.WAGNER, 1929, PLATINUM DEPOSITS AND MINES IN SOUTH AFRICA: STRUIK (PTY) LTD., CAPETOWN 1973, P. 32-40.MINING JOURNAL, 1977, V. 288.RANDFONTEIN ESTATES GOLD MINING COMPANY, WITWATERSRAND, LIMITED ANNUAL REPORTS 1973 - 1976 . "RANDFONTEIN'S COOKE SECTION - A NEW GOLD MINE FOR A FAMOUS OLD PRODUCER"; MINING MAGAZINE; APRIL 197CHAMBER 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 ; ANALYSES OF WORKING RESULTS, CHAMBER OF MINES OF SOUTH AFRICA - 1980 ; 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 1978 ; ANALYSIS OF WORKING RESULTS, CHAMBER OF MINES OF SOUTH AFRICA. JANUARY - DECEMBER 1979 ; ANALYSIS OF WORKING RESULTS, CHAMBER OF MINES OF SOUTH AFRICA, JANUARY-DECEMBER 1977