Ncheu outcrops, Ntcheu, Central Region, Malawii
| Regional Level Types | |
|---|---|
| Ncheu outcrops | Group of Outcrops |
| Ntcheu | District |
| Central Region | Region |
| Malawi | Country |
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Latitude & Longitude (WGS84):
14° 43' South , 34° 37' East
Latitude & Longitude (decimal):
Locality type:
Group of Outcrops
KΓΆppen climate type:
3 outcrops pf nepheline gneiss occur about 12 km NW of Ncheu (Walshaw 1965; Bloomfield 1965). The outcrops extends for about 8 km.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
6 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 Albite Formula: Na(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.
Walshaw, R. D. (1965). The geology of the Ncheu-Balaka area (No. 19). Government Printer. |
| β Albite var. Oligoclase Formula: (Na,Ca)[Al(Si,Al)Si2O8] Reference: Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63.
Walshaw, R. D. (1965). The geology of the Ncheu-Balaka area (No. 19). Government Printer. |
| 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.
Walshaw, R. D. (1965). The geology of the Ncheu-Balaka area (No. 19). Government Printer. |
| 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.
Walshaw, R. D. (1965). The geology of the Ncheu-Balaka area (No. 19). Government Printer. |
| β Cancrinite Formula: (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O Reference: Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63.
Walshaw, R. D. (1965). The geology of the Ncheu-Balaka area (No. 19). Government Printer. |
| 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.
Walshaw, R. D. (1965). The geology of the Ncheu-Balaka area (No. 19). Government Printer. |
| β Magnetite Formula: Fe2+Fe3+2O4 Reference: Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63.
Walshaw, R. D. (1965). The geology of the Ncheu-Balaka area (No. 19). Government Printer. |
| β Nepheline Formula: Na3K(Al4Si4O16) Reference: Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63.
Walshaw, R. D. (1965). The geology of the Ncheu-Balaka area (No. 19). Government Printer.
Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63.
Walshaw, R. D. (1965). The geology of the Ncheu-Balaka area (No. 19). Government Printer.
Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63.
Walshaw, R. D. (1965). The geology of the Ncheu-Balaka area (No. 19). Government Printer. |
| β Spinel Formula: MgAl2O4 Reference: Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63.
Walshaw, R. D. (1965). The geology of the Ncheu-Balaka area (No. 19). Government Printer. |
| β Titanite Formula: CaTi(SiO4)O Reference: Bloomfield, K. (1965). A reconnaissance survey of alkaline rocks in the northern and central regions. Records, Geological Survey of Malawi, 5, 17-63.
Walshaw, R. D. (1965). The geology of the Ncheu-Balaka area (No. 19). Government Printer. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| β | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| β | Spinel | 4.BB.05 | MgAl2O4 |
| Group 9 - Silicates | |||
| β | Albite | 9.FA.35 | Na(AlSi3O8) |
| β | var. Oligoclase | 9.FA.35 | (Na,Ca)[Al(Si,Al)Si2O8] |
| β | Cancrinite | 9.FB.05 | (Na,Ca,β»)8(Al6Si6O24)(CO3,SO4)2 Β· 2H2O |
| β | Nepheline | 9.FA.05 | Na3K(Al4Si4O16) |
| β | Titanite | 9.AG.15 | CaTi(SiO4)O |
| 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' | - | |
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 Cancrinite | (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O |
| H | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| C | Carbon | |
| C | β Cancrinite | (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O |
| O | Oxygen | |
| 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 Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| O | β Nepheline | Na3K(Al4Si4O16) |
| O | β Cancrinite | (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O |
| O | β Magnetite | Fe2+Fe23+O4 |
| O | β Spinel | MgAl2O4 |
| O | β Titanite | CaTi(SiO4)O |
| O | β Albite | Na(AlSi3O8) |
| 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 Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| Na | β Nepheline | Na3K(Al4Si4O16) |
| Na | β Cancrinite | (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O |
| Na | β Albite | Na(AlSi3O8) |
| Mg | Magnesium | |
| 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 |
| Mg | β Spinel | MgAl2O4 |
| Al | Aluminium | |
| 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 Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| Al | β Nepheline | Na3K(Al4Si4O16) |
| Al | β Cancrinite | (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O |
| Al | β Spinel | MgAl2O4 |
| Al | β Albite | Na(AlSi3O8) |
| Al | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Si | Silicon | |
| 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 Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| Si | β Nepheline | Na3K(Al4Si4O16) |
| Si | β Cancrinite | (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O |
| Si | β Titanite | CaTi(SiO4)O |
| Si | β Albite | Na(AlSi3O8) |
| Si | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| S | Sulfur | |
| S | β Cancrinite | (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O |
| Cl | Chlorine | |
| Cl | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| K | Potassium | |
| 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 |
| K | β Nepheline | Na3K(Al4Si4O16) |
| Ca | Calcium | |
| Ca | β Albite var. Oligoclase | (Na,Ca)[Al(Si,Al)Si2O8] |
| Ca | β Cancrinite | (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O |
| Ca | β Titanite | CaTi(SiO4)O |
| 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 Titanite | CaTi(SiO4)O |
| Ti | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Fe | Iron | |
| 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 |
| Fe | β Magnetite | Fe2+Fe23+O4 |
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.
Walshaw, R. D. (1965). The geology of the Ncheu-Balaka area (No. 19). Government Printer.
Other Regions, Features and Areas containing this locality
Africa
- East African Rift System (EARS)Zone (Tectonic)
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