Mine detail: Bracken Mines

Previously called ''

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Location

Lat / long:

-26.51325, 29.10144

Resource(M)

Primary:	Gold
Secondary:	Silver, PGE, Osmium, Iridium, Platinum, Ruthenium, Rhodium
Tertiary:	Subbituminous, Sulfur-Pyrite, Uranium
Ore:	Chalcopyrite, Galena, Sphalerite, Uraninite
Orebody form:	TABULAR/BLANKET
Discovery year:	1951

Production

Operation type:	Unknown
Production size:	Large
Development status:	Producer
First production started:	1962

Geology

Host rock:	Ecca Series, Karroo System; Shale, Sandstone & Coal;Transvaal System--Dolomite;Witwatersrand System (Upper Division)-Quartzite, 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., Synclinal Basin Separated From Central And East Rand Occurrences Of The Witwatersrand System. Unconformable Ecca Series, Karroo System Shales, Sandstones And Coal Are Notable. Dips Variable, Faulting Severe.
Tectonic:	Platform
Alteration processes:	None

References

MRDS	W026836
DEP	10078489
Reference	{Deposit:: UNION CORPORATION LIMITED, ANNUAL REPORT; 1975}{Deposit:: MINERAL RESOURCES OF SOUTH-CENTRAL AFRICA; PELLETIER, R. A.; 1964}{Deposit:: MINING JOURNAL QUARTERLY REVIEW OF SOUTH AFRICAN GOLD SHARES, VOL. 19 . NO. 1 ; MAY 1975}{Deposit:: COUSINS, 1973, PLATINOIDS IN THE WITWATERSRAND SYSTEM: JOURNAL SOUTH AFRICAN INST. MIN. AND METALL., V. 73, NO. 6, P. 3-5.}{Deposit:: MERTIE, 1969, ECONOMIC GEOLOGY OF PLATINUM METALS: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 630, P. 45-48.}{Deposit:: SOUTH AFRICAN GOLD SHARES; IVOR JONES, ROY AND CO., INC., JOHANNESBURG; 197}{Production:: ANALYSES OF WORKING RESULTS, CHAMBER OF MINES OF SOUTH AFRICA (CURRENT YEAR) ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1985 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS-1986 ; CHAMBER OF MINES OF SOUTH AFRICA - ANALYSIS OF WORKING RESULTS - 1981 ; BRACKEN MINES LIMITED ANNUAL REPORT - 1982 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1983 ; CHAMBER OF MINES ANALYSIS OF WORKING RESULTS - 1984 ; 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 1979 ; ANALYSIS OF WORKING RESULTS, CHAMBER OF MINES OF SOUTH AFRICA, JANUARY-DECEMBER 1977}
Reporter	Sweetwood, Charles W., Mccarter, Lorna D, Mccarter, Lorna D.