Mine detail: Vaal Reefs

Previously called 'Vaal Reefs Exploration and Mining Company Limited'

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Location

Lat / long: -26.91326, 26.75147

Resource(B)

Primary: Gold
Secondary: Sulfur, Sulfuric Acid, PGE, Platinum, Osmium, Iridium, Ruthenium, Rhodium, Sulfur-Pyrite, Silver
Tertiary: Uranium
Ore: Gold, Pyrrhotite, Sperrylite
Orebody form: TABULAR/BLANKET
Discovery year: 1887

Production

Operation type: Unknown
Production size: Large
Development status: Producer
First production started: 1941

Geology

Host rock:Transvaal System-Campbell Rand Dolomite;Witwatersrand System (Upper Division)-Quartzites, Shales, Grits And Conglomerates
Host type:Quartzite,Shale,Conglomerate
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 Conformable Sediments, Uniformly - Gentle Dip, But With Local Folds And Faults. Overlying Lavas And Dolomites Are Massive.
Tectonic:Platform
Alteration processes:None

References

MRDSW014845
DEP10071448
Reference{Deposit:: ANGLO AMERICAN CORPORATION OF SOUTH AFRICA LIMITED; ANNUAL REPORTS: 1974 & 1975}{Deposit:: MINING JOURNAL QUARTERLY REVIEW OF SOUTH AFRICAN GOLD SHARES; VOLUME 19, NO. 1: MAY 1975}{Deposit:: SOUTH AFRICAN GOLD SHARES; IVOR JONES, ROY AND CO., INC., JOHANNESBURG; 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 OF THE WITWATERSRAND SYSTEM: JOURNAL OF SOUTH AFRICA INSTITUTE OF MINING AND METALLURGY, V. 73, NO. 6, P. 3-5.}{Deposit:: WAGNER, 1929, PLATINUM DEPOSITS AND MINES OF SOUTH AFRICA: STRUIK (PTY) LTD., CAPETOWN 1973, P. 32-40.}{Deposit:: FEATHER, 1976, MINERALOGY OF THE PLATINUM-GROUP MINERALS IN THE WITWATERSRAND: ECONOMIC GEOLOGY, V. 71, NO. 7, P. 1419.}{Deposit:: MINING JOURNAL, 1977, V. 288.}{Deposit:: COAL, GOLD, AND BASE MINERALS OF SOUTHERN AFRICA, 1973, MARCH 1973.}{Deposit:: SOUTH AFRICAN MINING AND ENGINEERING JOURNAL, 1975, SEPTEMBER 1975.}{Production:: CHAMBER OF MINES OF SOUTH AFRICA ; 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 ; 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 ; 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}
ReporterSweetwood, Charles W., Mccarter, Lorna D.