| Location: | Eastern Cape, South Africa, Africa |
| Lat / long: | -28.04659, 23.03486 |
| dep_id: | 10079126 |
| mrds_id: | W028039 |
| Commodity type: | metallic |
| Major mineral: | Manganese |
| Minor mineral: | Iron |
| Operation type: | Unknown |
| Production size: | Large ammount of material produced |
| Development status: | Producer |
| ore: | Jacobsite, Manganite, Todorokite |
| orebody_fm: | IRREGULAR |
| work_type: | Surface |
| conc_proc: | Leaching Of Manganese From Dolomite And Replacement In Overlying Shale Generally Believed To Have Begun During Post-Waterburg System Period (Pre-Cambrian), But Also Believed To Be Continuing Today. Development Of The Varied Assemblage Of Accessory Minerals Present Thought To Be Due To Prolonged Load Metamorphism During Deep Burial Of The Area Under Karoo Rocks (Jurassic). |
| ore_ctrl: | Gentle Uplift Of Continental Mass; Minor Folding; Erosion; Leaching Of Manganese From Dolomite; Replacement; Manganese Concentration In Shale. |
| Reporter: | Mccarter, Lorna D., Sweetwood, Charles W. |
| hrock_type: | Shale |
| Structure: | Low Intensity Anticlines And Synclines Regionally (Principally The Maremane Anticline And Dimoten Syncline In General Vicinity Of Lohathia). Ore Horizon And Host Rocks Dip And Fold Gently Regionally, But With Dramatic Changes Locally. Occasional Dike Injections. Faulting Insignificant., Folding And Slumping Of The Ore Horizon And Host Rocks Common. Dramatic Dip Changes Locally. Minor Faulting. Ore Horizon Thickness Highly Variable (From Less Than One Meter To Over 15 Meters) Reflecting Erratic Replacement During Manganization. |
| tectonic: | Platform. Possibly Several Tectonic Cycles. |
| Year first produced: | 1922 |
| disc_yr: | 1922 |
| discr: | Captain T. L. H. Shone |
| 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
- Deposit:: SOUTH AFRICAN MANGANESE AMCOR LIMITED, 1976, BROCHURE.
- Deposit:: SOUTH AFRICAN MANGANESE AMCOR LIMITED,1976, ANNUAL REPORTS.
- Deposit:: SOUTH AFRICAN MANGANESE AMCOR LIMITED,1975, ANNUAL REPORTS.
- Deposit:: SOUTH AFRICAN MANGANESE AMCOR LIMITED,1974, ANNUAL REPORTS.
- Other Database:: ISMI
- Production:: THROUGH 1977: SOUTH AFRICAN MANGANESE AMCOR LTD ANNUAL REPORTS. FROM 1978 ON; PRESS RELEASES, COMPANY BROCHURES. ; ESTIMATED BASED ON TOTAL COUNTRY PRODUCTION OF MANGANESE SUPPLIED BY THE MINERALS BUREAU AND INFORMATION PEOVIDED BY SAMANCOR OFFICIALS.
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