| Location: | Eastern Cape, South Africa, Africa |
| Lat / long: | -27.09662, 22.86819 |
| dep_id: | 10079219 |
| mrds_id: | W028267 |
| Commodity type: | metallic |
| Major mineral: | Manganese |
| Minor mineral: | Iron |
| Operation type: | Unknown |
| Production size: | Large ammount of material produced |
| Development status: | Producer |
| ore: | Bixbyite |
| gangue: | Clay |
| orebody_fm: | TABULAR/BLANKET |
| work_type: | Underground |
| conc_proc: | Indications Are Of Syngenetic Origin, With Subsequent Supergene Enrichment And Replacement. The Distinctly Layered Stratiform Orebodies Have Been Conformably Folded With The Host Rock. The Manganiferous Beds Were Probably Deposited As A Primary Sedimentary Mixture Of Manganese Hydroxide And Manganese And Calcium Carbonates, With Localized Iron Hydroxide And Calcium - Magnesium Carbonate. |
| ore_ctrl: | Gentle Uplift Of Continental Mass; Minor Folding And Faulting; Erosion; Manganiferous Solutions Circulated Through Tectonically Disturbed Banded Ironstone (Syngentically) To Give Rise To Metasomatic Replacement Of The Country Rock With Manganese Along Favorable Layers. |
| Reporter: | Mccarter, Lorna D., Sweetwood, Charles W., Mccarter Lorna D |
| hrock_type: | Volcanic Rock (Aphanitic) |
| arock_type: | Volcanic Rock (Aphanitic) |
| Structure: | Low Intensity Anticlines And Synclines Regionally. Faulting Intermittent And Of Limited Magnitude, Orebodies Dip Gently Westward With Only Minor Undulations. Two Post-Mineral, Normal, Faults Exist Within The Central Portion Of The Minable Zone ( 20 - 40 Meter Throws), But Neither Are Located In Current Minng Areas And Not Expected To Influence Operations For A Number Of Years. |
| tectonic: | Platform; Possibly Several Tectonic Cycles |
| Year first produced: | 1973 |
| disc_yr: | 1951 |
| References: |
- Deposit:: MINERAL RESOURCES OF THE REPUBLIC OF SOUTH AFRICA, FIFTH EDITION, HANDBOOK 7 , DEPARTMENT OF MINES, GEOLOGICAL SURVEY; 1976
- Deposit:: MINERAL RESOURCES OF SOUTH-CENTRAL AFRICA; PELLETIER, R. A.; 1964
- Deposit:: THE MANGANESE DEPOSITS OF THE UNION OF SOUTH AFRICA, HANDBOOK 2 , DEPARTMENT OF MINES, GEOLOGICAL SURVEY; 1960
- Production:: SOUTH AFRICAN MANGANESE AMCOR LIMITED ANNUAL REPORTS, 1974 - 1976 , AND SOUTH AFRICAN MANGANESE AMCOR LTD. BROCHURE; CIRCA 1976. AFTER 1976: PRESS RELEASES & SOUTH AFRICAN MINERALS BUREAU ; ESTIMATE BASED ON TOTAL COUNTRY PRODUCTION OF MANGANESE (SUPPLIED BY MINERALS BUREAU) AND INFORMATION SUPPLIED BY SAMANCOR OFFICIALS.
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