Description
L. G. Boardman
Commodities
PrimaryManganese
SecondaryIron
Commodity typeM
Deposit
Deposit sizeL
WorkingsSurface/Underground
Orebody formTABULAR/BLANKET
Ore controlGentle Uplift Of Continental Mass; Minor Folding And Faulting; Erosion; Man Ganiferous 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 mineralsBixbyite
GangueClay
Geology
Host rockVolcanic Rock (Aphanitic)
Associated rockVolcanic Rock (Aphanitic)
StructureLow Intensity Anticlines And Synclines Regionally. Faulting Intermittent And Of Limited Magnitude., The Ore-Bearing Structure Is A North-Trending Asymmetrical Anticline Planed Off By Erosion. Dips Are Moderately Variable On The Western Limb ( 20 - 25 Degrees West ) And Broken By Faulting, And Erratic, On The Eastern Limb.
Tectonic settingPlatform; Possibly Several Tectonic Cycles
Economic & production
Development statusProducer
First production1955
Discovery year1941
Identification
Deposit ID10079221
MRDS IDW028269
Alternate namesDevon & Adams Mine
RegionAF
Data scoreB
Coordinates-29.04763, 25.221
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; 1960ANNUAL RPTS OF ASSOC MANGANESE MINES OF SOUTH AFRICA LTD. ; ASSOCIATED MANGANESE COMPANY OFFICIALS ; ASSOCIATED MANGANESE MINES ANNUAL REPORT - 1981