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Mongolowe-Chaone-Chikala Complexes, Machinga, Southern Region, Malawii
Regional Level Types
Mongolowe-Chaone-Chikala ComplexesGroup of Complexs
MachingaDistrict
Southern RegionRegion
MalawiCountry

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PhotosMapsSearch
Latitude & Longitude (WGS84):
15° 7' 59'' South , 35° 22' 59'' East
Latitude & Longitude (decimal):
-15.13333,35.38333
GeoHash:
G#: kv31vjj3g
GRN:
S11E24
Type:
Group of Complexs
Köppen climate type:
Aw : Tropical savanna, wet
Mindat Locality ID:
407445
Long-form identifier:
mindat:1:2:407445:1
GUID (UUID V4):
0c93b0f9-2224-40e8-85fc-3a2e4411bf55


The overlapping complexes of Mongolowe, Chaone, Chikala and Chinduzi Intrusion, Mongolowe-Chaone-Chikala Complexes, Machinga, Southern Region, Malawi are the most extensive centres of nepheline syenite-syenite in the northern part of Chilwa Province.

Also in contact with the Zomba-Malosa Complex (https://www.mindat.org/loc-407497.html)

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

16 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Aegirine
Formula: NaFe3+Si2O6
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
ⓘ Aegirine-augite
Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
Woolley, A. R. (2001). Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London, p. 167.
ⓘ 'Alkali Feldspar'
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
Woolley, A. R. (2001). Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London, p. 167.
ⓘ 'Amphibole Supergroup'
Formula: AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
Woolley, A. R. (2001). Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London, p. 167.
ⓘ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
ⓘ Arfvedsonite
Formula: [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
Woolley, A. R. (2001). Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London, p. 167.
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
Woolley, A. R. (2001). Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London, p. 167.
ⓘ Diopside
Formula: CaMgSi2O6
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
ⓘ Diopside var. Salite
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
ⓘ 'Feldspar Group'
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
Woolley, A. R. (2001). Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London, p. 167.
ⓘ 'Feldspar Group var. Perthite'
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
Woolley, A. R. (2001). Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London, p. 167.
ⓘ Ferro-edenite
Formula: NaCa2Fe2+5(Si7Al)O22(OH)2
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
Woolley, A. R. (2001). Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London, p. 167.
ⓘ Hastingsite
Formula: NaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
ⓘ Hedenbergite
Formula: CaFe2+Si2O6
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
ⓘ 'Hornblende Root Name Group'
Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
ⓘ Katophorite
Formula: {Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
ⓘ Magnesio-arfvedsonite
Formula: {Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
ⓘ 'Mica Group'
ⓘ Natrolite
Formula: Na2Al2Si3O10 · 2H2O
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
ⓘ Nepheline
Formula: Na3K(Al4Si4O16)
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
Woolley, A. R. (2001). Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London, p. 167.
ⓘ 'Pyroxene Group'
Formula: ADSi2O6
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
ⓘ Quartz
Formula: SiO2
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
Woolley, A. R. (2001). Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London, p. 167.
ⓘ Richterite
Formula: Na(NaCa)Mg5(Si8O22)(OH)2
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
ⓘ Sodalite
Formula: Na4(Si3Al3)O12Cl
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
ⓘ Titanite
Formula: CaTi(SiO4)O
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
ⓘ 'Zeolite Group'
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W
ⓘ Zircon
Formula: Zr(SiO4)
References:
Garson, M. S. (1960). The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C. J. (1960). The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology, 63(Transactions 1960), 99-118.
Vail, J. R., & Monkman, L. J. (1960). A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology, 63(1), 119-135.
Bloomfield, K. (1961). The age of the Chilwa alkaline province. Records, Geological Survey of Malawi, 1, 95-100.
Bloomfield, K. (1965). The geology of the Zomba area. Geological Survey Dept. Bulletin, (16).
Vail, J. R., & Mallick, D. I. J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Rec. geol. Surv. Malawi, 3, 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A. R., & Jones, G. C. (1987). The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications, 30(1), 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 9 - Silicates
ⓘZircon9.AD.30Zr(SiO4)
ⓘTitanite9.AG.15CaTi(SiO4)O
ⓘDiopside
var. Salite		9.DA.15CaMgSi2O6
ⓘ9.DA.15CaMgSi2O6
ⓘHedenbergite9.DA.15CaFe2+Si2O6
ⓘAegirine-augite9.DA.20(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
ⓘAegirine9.DA.25NaFe3+Si2O6
ⓘFerro-edenite9.DE.15NaCa2Fe2+5(Si7Al)O22(OH)2
ⓘHastingsite9.DE.15NaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2
ⓘRichterite9.DE.20Na(NaCa)Mg5(Si8O22)(OH)2
ⓘKatophorite9.DE.20{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
ⓘArfvedsonite9.DE.25[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
ⓘMagnesio-arfvedsonite9.DE.25{Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2
ⓘNepheline9.FA.05Na3K(Al4Si4O16)
ⓘSodalite9.FB.10Na4(Si3Al3)O12Cl
ⓘ'Zeolite Group'9.G0.
ⓘNatrolite9.GA.05Na2Al2Si3O10 · 2H2O
Unclassified
ⓘ'Feldspar Group'-
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Feldspar Group
var. Perthite'		-
ⓘ'Mica Group'-
ⓘ'Amphibole Supergroup'-AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
ⓘ'Hornblende Root Name Group'-◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
ⓘ'Pyroxene Group'-ADSi2O6
ⓘ'Alkali Feldspar'-
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
Hⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Hⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ Ferro-edeniteNaCa2Fe52+(Si7Al)O22(OH)2
Hⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Hⓘ Magnesio-arfvedsonite{Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2
Hⓘ NatroliteNa2Al2Si3O10 · 2H2O
Hⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Hⓘ Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
Hⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Hⓘ ApatiteCa5(PO4)3(Cl/F/OH)
OOxygen
Oⓘ AegirineNaFe3+Si2O6
Oⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Oⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Oⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ DiopsideCaMgSi2O6
Oⓘ Ferro-edeniteNaCa2Fe52+(Si7Al)O22(OH)2
Oⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Oⓘ HedenbergiteCaFe2+Si2O6
Oⓘ Magnesio-arfvedsonite{Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2
Oⓘ NephelineNa3K(Al4Si4O16)
Oⓘ NatroliteNa2Al2Si3O10 · 2H2O
Oⓘ QuartzSiO2
Oⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Oⓘ SodaliteNa4(Si3Al3)O12Cl
Oⓘ TitaniteCaTi(SiO4)O
Oⓘ ZirconZr(SiO4)
Oⓘ Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
Oⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Oⓘ Pyroxene GroupADSi2O6
Oⓘ ApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
Fⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Fⓘ ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Naⓘ AegirineNaFe3+Si2O6
Naⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Naⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Naⓘ Ferro-edeniteNaCa2Fe52+(Si7Al)O22(OH)2
Naⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Naⓘ Magnesio-arfvedsonite{Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2
Naⓘ NephelineNa3K(Al4Si4O16)
Naⓘ NatroliteNa2Al2Si3O10 · 2H2O
Naⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Naⓘ SodaliteNa4(Si3Al3)O12Cl
Naⓘ Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
MgMagnesium
Mgⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ DiopsideCaMgSi2O6
Mgⓘ Magnesio-arfvedsonite{Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2
Mgⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Mgⓘ Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
AlAluminium
Alⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Alⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ Ferro-edeniteNaCa2Fe52+(Si7Al)O22(OH)2
Alⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Alⓘ NephelineNa3K(Al4Si4O16)
Alⓘ NatroliteNa2Al2Si3O10 · 2H2O
Alⓘ SodaliteNa4(Si3Al3)O12Cl
Alⓘ Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
Alⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
SiSilicon
Siⓘ AegirineNaFe3+Si2O6
Siⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Siⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Siⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ DiopsideCaMgSi2O6
Siⓘ Ferro-edeniteNaCa2Fe52+(Si7Al)O22(OH)2
Siⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Siⓘ HedenbergiteCaFe2+Si2O6
Siⓘ Magnesio-arfvedsonite{Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2
Siⓘ NephelineNa3K(Al4Si4O16)
Siⓘ NatroliteNa2Al2Si3O10 · 2H2O
Siⓘ QuartzSiO2
Siⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Siⓘ SodaliteNa4(Si3Al3)O12Cl
Siⓘ TitaniteCaTi(SiO4)O
Siⓘ ZirconZr(SiO4)
Siⓘ Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
Siⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Siⓘ Pyroxene GroupADSi2O6
PPhosphorus
Pⓘ ApatiteCa5(PO4)3(Cl/F/OH)
ClChlorine
Clⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Clⓘ SodaliteNa4(Si3Al3)O12Cl
Clⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Clⓘ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ NephelineNa3K(Al4Si4O16)
CaCalcium
Caⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Caⓘ DiopsideCaMgSi2O6
Caⓘ Ferro-edeniteNaCa2Fe52+(Si7Al)O22(OH)2
Caⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Caⓘ HedenbergiteCaFe2+Si2O6
Caⓘ RichteriteNa(NaCa)Mg5(Si8O22)(OH)2
Caⓘ TitaniteCaTi(SiO4)O
Caⓘ Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2
Caⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Caⓘ ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Tiⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiⓘ TitaniteCaTi(SiO4)O
FeIron
Feⓘ AegirineNaFe3+Si2O6
Feⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Feⓘ Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ Ferro-edeniteNaCa2Fe52+(Si7Al)O22(OH)2
Feⓘ HastingsiteNaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2
Feⓘ HedenbergiteCaFe2+Si2O6
Feⓘ Magnesio-arfvedsonite{Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2
ZrZirconium
Zrⓘ ZirconZr(SiO4)

Geochronology

Mineralization age: Early/Lower Cretaceous : 138 ± 14 Ma to 116 ± 6 Ma

Important note: This table is based only on rock and mineral ages recorded on mindat.org for this locality and is not necessarily a complete representation of the geochronology, but does give an indication of possible mineralization events relevant to this locality. As more age information is added this table may expand in the future. A break in the table simply indicates a lack of data entered here, not necessarily a break in the geologic sequence. Grey background entries are from different, related, localities.

Geologic TimeRocks, Minerals and Events
Phanerozoic
 Mesozoic
  Cretaceous
   Early/Lower Cretaceous
ⓘ Biotite116 ± 6 MaChinduzi Intrusion, Mongolowe-Chaone-Chikala Complexes, Machinga, Southern Region, Malawi
ⓘ Titanite (youngest age)122.6 ± 11.4 Ma
ⓘ Amphibole Supergroup123 ± 3 Ma
ⓘ Titanite (oldest age)137.1 ± 8.7 Ma
ⓘ Zircon138 ± 14 Ma

Localities in this Region

Malawi

Other Regions, Features and Areas containing this locality

Africa
Somali PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

www.researchgate.net (n.d.) https://www.researchgate.net/profile/Alan_Woolley/publication/238438296_The_Mineralogy_of_Nepheline_Syenite_Complexes_from_the_Northern_Part_of_the_Chilwa_Province_Malawi/links/54d0f4170cf298d6566957c7.pdf [Woolley & Platt, 1986]
Garson, M.S. (1960) The geology of the Lake Chilwa area (No. 12). Government Printer.
Stillman, C.J. (1960) The Chikala Hill syenite-complex of southern Nyasaland. South African Journal of Geology: 63(1) (Transactions 1960): 99-118.
Vail, J.R., Monkman, L.J. (1960) A geological reconnaissance survey of the Chaone Hill ring complex, southern Nyasaland. South African Journal of Geology: 63(1) (Transaction 1960): 119-135.
Bloomfield, K. (1961) The age of the Chilwa alkaline province. Records of the Geological Survey of Malawi: 1: 95-100.
Bloomfield, K. (1965) The geology of the Zomba area. Geological Survey Department Bulletin 16.
Vail, J.R., Mallick, D.I.J. (1965). The Mongolowe Hills nepheline-syenite ring-complex, southern Malawi. Records of the Geological Survey of Malawi: 3: 49-60.
Woolley, Alan R., Garth Platt, R. (1986) The mineralogy of nepheline syenite complexes from the northern part of the Chilwa Province, Malawi. Mineralogical Magazine, 50 (358) 597-610 doi:10.1180/minmag.1986.050.358.05
Woolley, A.R., Jones, G.C. (1987) The petrochemistry of the northern part of the Chilwa alkaline province, Malawi. Geological Society, London, Special Publications: 30(1): 335-355. doi.org/10.1144/GSL.SP.1987.030.01.16
Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., Woolley, A.R. (1995) Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal of African Earth Sciences: 20: 275-288. doi.org/10.1016/0899-5362(95)00054-W
Woolley, A.R. (2001) Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London: 167.
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