Mine detail: Grootvlei Mines

Previously called 'Grootvlei Proprietary Mines'

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Location

Lat / long: -26.22993, 28.50145

Resource(M)

Primary: Gold
Secondary: PGE, Platinum, Osmium, Iridium, Rhodium, Ruthenium, Silver
Tertiary: Uranium
Ore: Chalcopyrite, Galena, Pyrite, Pyrrhotite, Sphalerite, Uraninite
Orebody form: TABULAR/BLANKET

Production

Operation type: Unknown
Production size: Large
Development status: Producer
First production started: 1938

Geology

Host rock:Transvaal System-Dolomite;Witwatersrand System (Upper Division)-Quartzites, Shales, Grits, Conglomerates, And Carbon Granules
Host type:Quartzite,Shale,Conglomerate,Volcanic Rock (Aphanitic)
Associated rock:Ventersdorp System-Lava
Associated type:Volcanic Rock (Aphanitic)
Structure:Unique Continuity Of Gold-Bearing Horizons Over Extended Area, Though Well Marked By Folding, Faulting And (Locally) Erosion And Redeposition Of Overlying Sediments, Gentle Dip Regionally, With Folds And Faults Locally. Overlying Lavas And Dolomites Are Massive.
Tectonic:Platform
Alteration processes:None

References

MRDSW026844
DEP10078496
Reference{Deposit:: UNION CORPORATION LIMITED, ANNUAL REPORT; 1975}{Deposit:: MINERAL RESOURCES OF SOUTH-CENTRAL AFRICA; PELLETIER, R. A.; 1964}{Deposit:: MERTIE, 1969, ECONOMIC GEOLOGY OF PLATINUM METALS: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 630, P. 45-48.}{Deposit:: COUSINS, 1973, PLATINOIDS IN THE WITWATERSRAND SYSTEM: SOUTH AFRICA INST. MINING AND METALL., V. 73, NO. 6, P. 3-5.}{Deposit:: WAGNER, 1929, PLATINUM MINES AND DEPOSITS OF SOUTH AFRICA: STRUIK (PTY) LTDS., CAPETOWN, 1973, P. 32-40.}{Deposit:: MINING JOURNAL, 1977, V. 288.}{Deposit:: IVOR JONES, ROY & COMPANY, INC., SOUTH AFRICAN GOLD SHARES: JOHANNESBURG, IVOR JONES, ROY & COMPANY, INC.}{Deposit:: MINING JOURNAL, 1975, QUARTERLY REVIEW OF SOUTH AFRICAN SHARES: MINING JOURNAL, V. 19, NO. 1, MAY 1975.}{Production:: CHAMBER OF MINES OF SOUTH AFRICA ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS-1982 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS-1983 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1984 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1985 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS-1986 ; ANALYSIS OF WORKING RESULTS. CHAMBER OF MINES OF SOUTH AFRICA, JANUARY-DECEMBER 1979 ; ANALYSES OF WORKING RESULTS, CHAMBER OF MINES OF SOUTH AFRICA - 1980 ; CHAMBER OF MINES OF SOUTH AFRICA - ANALYSIS OF WORKING RESULTS - 1981 ; 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.}
ReporterSweetwood, Charles W., Mccarter, Lorna D, Mccarter, Lorna D.