Commodities
PrimaryManganese
SecondaryIron
Commodity typeM
Deposit
Deposit sizeL
WorkingsSurface
Orebody formIRREGULAR
Ore controlGentle Uplift Of Continental Mass; Minor Folding And Faulting; Erosion; Manganiferous Solutions Circulated Through Tectonically Disturbed Banded Ironstone (Syngenetically) To Give Rise To Metasomatic Replacement Of The Country Rock With Manganese Along Favorable Layers.
Materials
Ore mineralsBraunite, Hausmannite
Geology
Host rockIron Formation
Associated rockVolcanic Rock (Aphanitic)
StructureLow Intensity Anticlines And Synclines Regionally. Post-Transvaal System Dike Intrusives (Granitic) Occur Intermittently. Faulting Intermittent And Of Limited Magnitude., Orebody Occurs In N - S Trending Asymmetrical Syncline. Dips Gentle, Though Variable. Minor Faulting. Ore Horizon (Basal Member) Massive. Major Dike Intrusive Generally Terminates (But Does Not Control) Ore At The South End Of The Deposit. Recent, Surface, Sand Fully Masks Off Visible Presence Of Orebody. Topography Flat.
Tectonic settingPlatform; Possibly Several Tectonic Cycles.
Economic & production
Development statusProducer
First production1963
Discovery year1950
Identification
Deposit ID10090140
MRDS IDW028038
RegionAF
Data scoreB
Coordinates-27.37994, 22.95152
References
MINERAL RESOURCES OF THE REPUBLIC OF SOUTH AFRICA, FIFTH EDITION, HANDBOOK 7 , DEPARTMENT OF MINES, GEOLOGICAL SURVEY; 1976MINERAL RESOURCES OF SOUTH-CENTRAL AFRICA; PELLETIER, R. A.; 1964THE MANGANESE DEPOSITS OF THE UNION OF SOUTH AFRICA, HANDBOOK 2 , DEPARTMENT OF MINES, GEOLOGICAL SURVEY; 1960ISMISOUTH AFRICAN MANGANESE AMCOR LIMITED ANNUAL REPORTS, 1974 - 1976 , AND SOUTH AFRICAN MANGANESE AMCOR LIMITED BROCHURE; CIRCA 1976. AFTER 1976: PRESS RELEASES & SOUTH AFRICAN MINERALS BUREAU ; ESTIMATE BASED ON TOTAL COUNTRY MANGANESE PRODUCTION SUPPLIED BY MINERALS BUREAU, AND VERBAL INFORMATION FROM SAMANCOR OFFICIALS.