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Holle potash deposit, Kouilou Department, Republic of the Congoi
| Regional Level Types | |
|---|---|
| Holle potash deposit | Deposit |
| Kouilou Department | Department |
| Republic of the Congo | Country |
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Latitude & Longitude (WGS84):
4° 32' 33'' South , 12° 4' 28'' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Loandjili | 23,204 (2014) | 33.8km |
| Pointe-Noire | 659,084 (2013) | 34.9km |
"The Republic of Congo is one of the few countries in sub-Saharan Africa with extensive potash resources. The Lower Cretaceous potash deposit of Holle in the coastal region of Congo was mined in the 1970s (de Ruiter 1979). The potash deposit at Holle occurs at depths of 400-700 m below sea level. The potassium salts in the Holle potash deposit are rich in carnallite and sylvite. Production of sylvite (KCl) reached 450,000 tonnes per year in the 1970s but was halted when the mine flooded in 1977 (de Ruiter 1979; Kronsten 1996). De Ruiter (1979) describes layers of 1.9 m and 3 m thickness with K2O contents of 18 and 38% respectively and mineable reserves of 17 million and 26 million tonnes K2O respectively." (www.uoguelph.ca/~geology/rocks_for_crops/20congo_rep.PDF)
The GPS coordinates are approximate only. A rough map of the area was compared to Google maps and a possible mine location was based on satellite imagery.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Anhydrite Formula: CaSO4 |
| ⓘ Carnallite Formula: KMgCl3 · 6H2O |
| ⓘ Halite Formula: NaCl |
| ⓘ Sylvite Formula: KCl |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 3 - Halides | |||
|---|---|---|---|
| ⓘ | Halite | 3.AA.20 | NaCl |
| ⓘ | Sylvite | 3.AA.20 | KCl |
| ⓘ | Carnallite | 3.BA.10 | KMgCl3 · 6H2O |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Anhydrite | 7.AD.30 | CaSO4 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Carnallite | KMgCl3 · 6H2O |
| O | Oxygen | |
| O | ⓘ Anhydrite | CaSO4 |
| O | ⓘ Carnallite | KMgCl3 · 6H2O |
| Na | Sodium | |
| Na | ⓘ Halite | NaCl |
| Mg | Magnesium | |
| Mg | ⓘ Carnallite | KMgCl3 · 6H2O |
| S | Sulfur | |
| S | ⓘ Anhydrite | CaSO4 |
| Cl | Chlorine | |
| Cl | ⓘ Carnallite | KMgCl3 · 6H2O |
| Cl | ⓘ Halite | NaCl |
| Cl | ⓘ Sylvite | KCl |
| K | Potassium | |
| K | ⓘ Carnallite | KMgCl3 · 6H2O |
| K | ⓘ Sylvite | KCl |
| Ca | Calcium | |
| Ca | ⓘ Anhydrite | CaSO4 |
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