Mine detail: Crown/City Deep/Cons. Main Reef Mines

Previously called ''

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Location

Lat / long:

-26.22993, 28.01812

Resource(M)

Primary:	Gold
Secondary:	PGE, Silver
Orebody form:	TABULAR/BLANKET
Discovery year:	1887

Production

Operation type:	Unknown
Production size:	Small
Development status:	Producer
First production started:	1887

Geology

Host rock:	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 Faulting And Folding, And (Locally) Erosion And Redeposition Of Overlying Sediments., Steep Dips Near Surface, Decreasing To Less Than 15 Degrees At Depth Of 3,000 Meters. Folds And Faults Locally. Intrusive Dikes Penetrate And Dilute Minable Ore Horizons.
Tectonic:	Platform
Alteration processes:	None

References

MRDS	W027864
DEP	10079049
Reference	{Deposit:: MINERAL RESOURCES OF SOUTH-CENTRAL AFRICA; PELLETIER, R.A.; 1964}{Deposit:: MINERAL RESOURCES OF THE REPUBLIC OF SOUTH AFRICA, FIFTH EDITION, HANDBOOK 7 ; 1976}{Deposit:: BARLOW RAND LIMITED ANNUAL REPORT; 1975}{Deposit:: CHAMBER OF MINES OF SOUTH AFRICA, 1951, MINING SURVEY: CHAMBER OF MINES OF SOUTH AFRICA, V. 3, NO. 4, SEPTEMBER 1951.}{Production:: ANALYSIS OF WORKING RESULTS; CHAMBER OF MINES OF SOUTH AFRICA; ANNUAL REPORTS 1976 , 1977}
Reporter	Sweetwood, Charles W.