Kongwe Occurrence, Dowa, Central Region, Malawii
| Regional Level Types | |
|---|---|
| Kongwe Occurrence | Occurrence |
| Dowa | District |
| Central Region | Region |
| Malawi | Country |
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Latitude & Longitude (WGS84):
13° 34' 59'' South , 33° 55' 0'' East
Latitude & Longitude (decimal):
Locality type:
KΓΆppen climate type:
Oval ring structure of about 6 x 4 km the central core of which consists of gneisses.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
3 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| β Aegirine-augite Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 Reference: Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63. |
| β 'Amphibole Supergroup' Formula: AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 Reference: Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63. |
| β 'Biotite' Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 Reference: Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63. |
| β 'Feldspar Group' Reference: Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63. |
| β 'Feldspar Group var. Perthite' Reference: Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63. |
| β 'Garnet Group' Formula: X3Z2(SiO4)3 Reference: Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63. |
| β Microcline Formula: K(AlSi3O8) Reference: Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63. |
| β Quartz Formula: SiO2 Reference: Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63. |
| β 'Sodic plagioclase' Reference: Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| β | Quartz | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| β | Aegirine-augite | 9.DA.20 | (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 |
| β | Microcline | 9.FA.30 | K(AlSi3O8) |
| Unclassified Minerals, Rocks, etc. | |||
| β | 'Amphibole Supergroup' | - | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| β | 'Biotite' | - | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| β | 'Feldspar Group' | - | |
| β | 'var. Perthite' | - | |
| β | 'Garnet Group' | - | X3Z2(SiO4)3 |
| β | 'Sodic plagioclase' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| H | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| O | Oxygen | |
| O | β Microcline | K(AlSi3O8) |
| O | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| O | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| O | β Garnet Group | X3Z2(SiO4)3 |
| O | β Quartz | SiO2 |
| O | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| F | Fluorine | |
| F | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| F | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Na | Sodium | |
| Na | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Mg | Magnesium | |
| Mg | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Mg | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| Al | Aluminium | |
| Al | β Microcline | K(AlSi3O8) |
| Al | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Al | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| Al | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Si | Silicon | |
| Si | β Microcline | K(AlSi3O8) |
| Si | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Si | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| Si | β Garnet Group | X3Z2(SiO4)3 |
| Si | β Quartz | SiO2 |
| Si | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Cl | Chlorine | |
| Cl | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| K | Potassium | |
| K | β Microcline | K(AlSi3O8) |
| K | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| Ca | Calcium | |
| Ca | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Ti | Titanium | |
| Ti | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
| Ti | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Fe | Iron | |
| Fe | β Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Fe | β Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 or Simplified: K(Mg,Fe)3AlSi3O10(OH)2 |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Woolley, A. R. (2001). Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London, p. 162.
Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63.
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