Description
Doornkop Gold Mining Co. & New Steyn Estates Mine Ltd.
Commodities
PrimaryGold
SecondaryRhodium, PGE, Platinum, Osmium, Iridium, Ruthenium, Silver
TertiarySulfur-Pyrite, Uranium, Copper, Lead, Zinc
Commodity typeM
Deposit
Model193: Quartz pebble conglomerate Au-U (BC name is Paleoplacer U-Au-PGE-Sn-Ti
Deposit sizeS
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-Bearing Horizons Over Extended Area, Though Well Marked By Folding, Faulting And (Locally) Erosion And Redeposition Of Overlying Conformable Sediments, Dips Vary From Gentle To Nearly Vertical In Mine Area. Folding And Faulting From Moderate To Severe. Overlying Lavas And Dolomites Are Thin To Massive. Both Minable Reefs Outcrop On Mine Property In Upthrow Fault Blocks, But Bulk Of Ore Occurs At Depths In Excess Of 200 Meters
Tectonic settingPlatform
AlterationNone
Economic & production
Development statusProducer
First production1937
Discovery year1888
Identification
Deposit ID10107349
MRDS IDW026838
RegionAF
Data scoreA
Coordinates-26.21328, 27.76812
References
GENERAL MINING AND FINANCE CORPORATION, ANNUAL REPORT; 1975MINERAL RESOURCES OF SOUTH - CENTRAL AFRICA; PELLETIER, R. A.; 1964SOUTH AFRICAN MINING & ENGINEERING JOURNAL, OCTOBER 1973MINING JOURNAL QUARTERLY REVIEW OF SOUTH AFRICAN GOLD SHARES, VOL. 19 , NO. 1 ; MAY 1975MERTIE, 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 OF SOUTH AFRICA INSTITUTE MINING AND METALLURGY, V. 73, NO. 6, P. 3-5.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 AND CO., INC., JOHANNESBURG; 197GENERAL MINING AND FINANCE CORPORATION LTD., ANNUAL REPORTS; 1970 - 975