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Brukkaros Complex, Berseba Townlands Farm 426, Berseba Constituency, ǁKaras Region, Namibiai
Regional Level Types
Brukkaros ComplexComplex
Berseba Townlands Farm 426Farm
Berseba ConstituencyConstituency
ǁKaras RegionRegion
NamibiaCountry

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Latitude & Longitude (WGS84):
25° 52' 13'' South , 17° 46' 50'' East
Latitude & Longitude (decimal):
-25.87035,17.78074
GeoHash:
G#: k7ksud7w3
GRN:
S18E12
Type:
Complex
Köppen climate type:
BWh : Hot deserts climate
Mindat Locality ID:
230314
Long-form identifier:
mindat:1:2:230314:0
GUID (UUID V4):
67dc54dd-a563-4f09-bc86-69324e6191ac
Other/historical names associated with this locality:
Gross Brukkaros Mountain; Brukkaros occurrence


Note: Baryte specimens come from the “Tses Baryte Prospect” located several km west of Tses.

Abstract from Lorenz et al (1992):

Gross Brukkaros is a volcano-shaped inselberg rising 600 m above the Nama plain in southern Namibia. It evolved in several steps starting with the intrusion of a laccolithic body which caused uplift and radial fissuring of the overlying rocks, Cambrian, Permocarboniferous and Upper Cretaceous Kalahari sediments as well as Jurassic dolerite sills. On the radial fissures more than 100 carbonatite dykes and 74 carbonatite diatremes were emplaced. The eruption from these dykes and diatremes caused a mass deficiency in the laccolith and subsidence of its roof, i.e. a downsag caldera formed collecting thick reworked sedimentary and pyroclastic debris. The carbonatite diatremes point to phreatomagmatic explosive activity because of occurrence of only non-vesicular carbonatite ash grains and lapilli and because the hydrogeology was conducive to such explosive activity: a near surface groundwater table is indicated by unconsolidated Kalahari sediments and the free groundwater table of the caldera lake of Gross Brukkaros.


Fossiliferous lake beds within the complex contain plant microfossils.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

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

17 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:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ 'Alkali Feldspar'
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
ⓘ Baryte
Formula: BaSO4
Description: Pale yellow crystals to 15cm on edge were found in veins outcropping the Gross Brukkaros.
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
Cairncross, Bruce (2004) Field Guide to Rocks & Minerals of Southern Africa. 288pp.
ⓘ Brookite
Formula: TiO2
ⓘ Brookite var. Niobium-bearing Brookite
Formula: (Ti,Nb,Fe)O2
ⓘ Calcite
Formula: CaCO3
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ Diopside
Formula: CaMgSi2O6
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ Diopside var. Chromium-bearing Diopside
Formula: Ca(Mg,Cr)Si2O6
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ Dolomite
Formula: CaMg(CO3)2
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ Goethite
Formula: α-Fe3+O(OH)
ⓘ Hematite
Formula: Fe2O3
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ Ilmenite
Formula: Fe2+TiO3
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ 'K Feldspar'
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ 'Limonite'
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ 'Mica Group'
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ Monticellite
Formula: CaMgSiO4
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ Nepheline
Formula: Na3K(Al4Si4O16)
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ 'Olivine Group'
Formula: M2SiO4
ⓘ Perovskite
Formula: CaTiO3
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ Pyrope
Formula: Mg3Al2(SiO4)3
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ 'Pyroxene Group'
Formula: ADSi2O6
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ Quartz
Formula: SiO2
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
Cairncross, Bruce (2004) Field Guide to Rocks & Minerals of Southern Africa. 288pp.
ⓘ Quartz var. Chalcedony
Formula: SiO2
ⓘ 'Rhombohedral Carbonate'
Formula: (Ca/Mg/Fe/Mn etc)CO3
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170
ⓘ 'Zeolite Group'
References:
Verwoerd, W. J. (1967). The carbonatites of South Africa and South West Africa. Government Printer, South Africa., 6.
JANSE, A. A. (1969). Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO
Janse, A. J. A. (1971). Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. doi.org/10.10520/AJA10120750_322
Allsopp, H. L., & Barrett, D. R. (1975). Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50044-4
Ferguson, J., Martin, H., Nicolaysen, L. O., & Danchin, R. V. (1975). Gross Brukkaros: a kimberlite–carbonatite volcano. In Physics and Chemistry of the Earth (pp. 219-234). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50021-3
Janse, A. J. A. (1975). Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. doi.org/10.1016/B978-0-08-018017-5.50012-2
Woldegabriel, Giday, Aronson, James L., Walter, Robert C. (1990) Geology, geochronology, and rift basin development in the central sector of the Main Ethiopia Rift. Geological Society of America Bulletin, 102 (4) 439-458 doi:10.1130/0016-7606(1990)102<0439:ggarbd>2.3.co;2
Reid, D. L., Cooper, A. F., Rex, D. C., & Harmer, R. E. (1990). Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. doi.org/10.1017/S001675680001517X
Stachel, T., Lorenz, V., & Stanistreet, I. G. (1994). Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. doi.org/10.1007/BF00326464
Stachel, T., Lorenz, V., & Brey, G. (1995). Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. doi.org/10.1007/BF00265038
Kurszlaukis, S., & Franz, L. (1997). Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). GEOLOGIYA I GEOFIZIKA, 38(1), 50-68.
Lorenz, V., & Kurszlaukis, S. (1997). On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. doi.org/10.1007/s004450050170

Gallery:

BaSO4ⓘ Baryte

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.α-Fe3+O(OH)
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘHematite4.CB.05Fe2O3
ⓘIlmenite4.CB.05Fe2+TiO3
ⓘPerovskite4.CC.30CaTiO3
ⓘQuartz
var. Chalcedony		4.DA.05SiO2
ⓘ4.DA.05SiO2
ⓘBrookite
var. Niobium-bearing Brookite		4.DD.10(Ti,Nb,Fe)O2
ⓘ4.DD.10TiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘAnkerite5.AB.10Ca(Fe2+,Mg)(CO3)2
ⓘDolomite5.AB.10CaMg(CO3)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘBaryte7.AD.35BaSO4
Group 9 - Silicates
ⓘMonticellite9.AC.10CaMgSiO4
ⓘPyrope9.AD.25Mg3Al2(SiO4)3
ⓘDiopside9.DA.15CaMgSi2O6
ⓘvar. Chromium-bearing Diopside9.DA.15Ca(Mg,Cr)Si2O6
ⓘAegirine9.DA.25NaFe3+Si2O6
ⓘPhlogopite9.EC.20KMg3(AlSi3O10)(OH)2
ⓘNepheline9.FA.05Na3K(Al4Si4O16)
ⓘ'Zeolite Group'9.G0.
Unclassified
ⓘ'Limonite'-
ⓘ'Alkali Feldspar'-
ⓘ'Mica Group'-
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'K Feldspar'-
ⓘ'Pyroxene Group'-ADSi2O6
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)
ⓘ'Olivine Group'-M2SiO4
ⓘ'Rhombohedral Carbonate'-(Ca/Mg/Fe/Mn etc)CO3

List of minerals for each chemical element

HHydrogen
Hⓘ Goethiteα-Fe3+O(OH)
Hⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Hⓘ ApatiteCa5(PO4)3(Cl/F/OH)
CCarbon
Cⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Cⓘ CalciteCaCO3
Cⓘ DolomiteCaMg(CO3)2
Cⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
OOxygen
Oⓘ AegirineNaFe3+Si2O6
Oⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Oⓘ BaryteBaSO4
Oⓘ BrookiteTiO2
Oⓘ CalciteCaCO3
Oⓘ Quartz var. ChalcedonySiO2
Oⓘ Diopside var. Chromium-bearing DiopsideCa(Mg,Cr)Si2O6
Oⓘ DiopsideCaMgSi2O6
Oⓘ DolomiteCaMg(CO3)2
Oⓘ Goethiteα-Fe3+O(OH)
Oⓘ HematiteFe2O3
Oⓘ IlmeniteFe2+TiO3
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ MonticelliteCaMgSiO4
Oⓘ NephelineNa3K(Al4Si4O16)
Oⓘ PerovskiteCaTiO3
Oⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Oⓘ PyropeMg3Al2(SiO4)3
Oⓘ QuartzSiO2
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oⓘ Pyroxene GroupADSi2O6
Oⓘ ApatiteCa5(PO4)3(Cl/F/OH)
Oⓘ Olivine GroupM2SiO4
Oⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
Oⓘ Brookite var. Niobium-bearing Brookite(Ti,Nb,Fe)O2
FFluorine
Fⓘ ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Naⓘ AegirineNaFe3+Si2O6
Naⓘ NephelineNa3K(Al4Si4O16)
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Mgⓘ Diopside var. Chromium-bearing DiopsideCa(Mg,Cr)Si2O6
Mgⓘ DiopsideCaMgSi2O6
Mgⓘ DolomiteCaMg(CO3)2
Mgⓘ MonticelliteCaMgSiO4
Mgⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Mgⓘ PyropeMg3Al2(SiO4)3
Mgⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
AlAluminium
Alⓘ NephelineNa3K(Al4Si4O16)
Alⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Alⓘ PyropeMg3Al2(SiO4)3
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ AegirineNaFe3+Si2O6
Siⓘ Quartz var. ChalcedonySiO2
Siⓘ Diopside var. Chromium-bearing DiopsideCa(Mg,Cr)Si2O6
Siⓘ DiopsideCaMgSi2O6
Siⓘ MonticelliteCaMgSiO4
Siⓘ NephelineNa3K(Al4Si4O16)
Siⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Siⓘ PyropeMg3Al2(SiO4)3
Siⓘ QuartzSiO2
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Siⓘ Pyroxene GroupADSi2O6
Siⓘ Olivine GroupM2SiO4
PPhosphorus
Pⓘ ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
Sⓘ BaryteBaSO4
ClChlorine
Clⓘ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kⓘ NephelineNa3K(Al4Si4O16)
Kⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Caⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Caⓘ CalciteCaCO3
Caⓘ Diopside var. Chromium-bearing DiopsideCa(Mg,Cr)Si2O6
Caⓘ DiopsideCaMgSi2O6
Caⓘ DolomiteCaMg(CO3)2
Caⓘ MonticelliteCaMgSiO4
Caⓘ PerovskiteCaTiO3
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Caⓘ ApatiteCa5(PO4)3(Cl/F/OH)
Caⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
TiTitanium
Tiⓘ BrookiteTiO2
Tiⓘ IlmeniteFe2+TiO3
Tiⓘ PerovskiteCaTiO3
Tiⓘ Brookite var. Niobium-bearing Brookite(Ti,Nb,Fe)O2
CrChromium
Crⓘ Diopside var. Chromium-bearing DiopsideCa(Mg,Cr)Si2O6
MnManganese
Mnⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
FeIron
Feⓘ AegirineNaFe3+Si2O6
Feⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Feⓘ Goethiteα-Fe3+O(OH)
Feⓘ HematiteFe2O3
Feⓘ IlmeniteFe2+TiO3
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ Rhombohedral Carbonate(Ca/Mg/Fe/Mn etc)CO3
Feⓘ Brookite var. Niobium-bearing Brookite(Ti,Nb,Fe)O2
NbNiobium
Nbⓘ Brookite var. Niobium-bearing Brookite(Ti,Nb,Fe)O2
BaBarium
Baⓘ BaryteBaSO4

Localities in this Region

Namibia

Other Regions, Features and Areas containing this locality

African 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

Verwoerd, W.J. (1967) The carbonatites of South Africa and South West Africa. Government Printer, South Africa, 6.
Janse, A.A. (1969) Gross Brukkaros, a probable carbonatite volcano in the Nama Plateau of Southwest Africa. Geological Society of America Bulletin, 80(4), 573-586. [doi.org/10.1130/0016-7606](1969)80[573:GBAPCV]2.0.CO;2
Janse, A.J.A. (1971) Monticellite bearing porphyritic peridotite from Gross Brukkaros, South West Africa. South African Journal of Geology, 74(2), 45-55. [doi.org/10.10520/AJA10120750_322].
Allsopp, H.L., Barrett, D.R. (1975) Rb–Sr age determinations on South African kimberlite pipes. In Physics and Chemistry of the Earth (pp. 605-617). Pergamon. [doi.org/10.1016/B978-0-08-018017-5.50044-4].
Ferguson, J., Martin, H., Nicolaysen, L.O., Danchin, R.V. (1975) Gross Brukkaros: A kimberlite–carbonatite volcano. Physics and Chemistry of the Earth, 9, pp.219-234. Pergamon. [doi.org/10.1016/0079-1946(75)90018-X].
Janse, A.J.A. (1975) Kimberlite and related rocks from the Nama Plateau of South-West Africa. In Physics and Chemistry of the Earth (pp. 81-94). Pergamon. [doi.org/10.1016/B978-0-08-018017-5.50012-2].
Reid, D.L., Cooper, A.F., Rex, D.C., Harmer, R.E. (1990) Timing of post–Karoo alkaline volcanism in southern Namibia. Geological Magazine, 127(5), 427-433. [doi.org/10.1017/S001675680001517X].
Kelber, K.-P., Franz, L., Stachel, T., Lorenz, V., Okrusch, M. (1992) Plant fossils from Gross Brukkaros (Namibia) and the biostratigraphical significance. Communications of the Geological Survey of Namibia, 8, pp.57-66.
Stachel, T., Lorenz, V., Stanistreet, I. G. (1994) Gross Brukkaros (Namibia)—An enigmatic crater-fill reinterpreted as due to Cretaceous caldera evolution. Bulletin of Volcanology, 56(5), 386-397. [doi.org/10.1007/BF00326464].
Kurszlaukis, S. (1994) Geology and geochemistry of the carbonatitic Gross Brukkaros volcanic field and the ultrabasic Blue Hills Intrusive Complex, southern Namibia. Unpublished PhD thesis, University of Wuerzurg, 292 pages.
Stachel, T., Lorenz, V., Brey, G. (1995) Carbonatite magmatism and fenitization of the epiclastic caldera-fill at Gross Brukkaros (Namibia). Bulletin of volcanology, 57(3), 185-196. [doi.org/10.1007/BF00265038].
Kurszlaukis, S., Franz, L. (1997) Phase petrology, geochemistry and evolution of the ultrabasic-carbonatitic Blue Hills Complex (southern Namibia). Geologiya I Geofizika, 38(1), 50-68.
Lorenz, V., Kurszlaukis, S. (1997) On the last explosions of carbonatite pipe G3b, Gross Brukkaros, Namibia. Bulletin of Volcanology, 59(1), 1-9. [doi.org/10.1007/s004450050170]
Lorenz, V., Stachel, T., Kurszlaukis, S., Stanistreet, I.G. (2000) Volcanology of the Gross Brukkaros field, southern Namibia. Communications of the Geological Survey of Namibia 12, 395-401.
Woolley, A.R. (2001) Alkaline rocks and carbonatites of the world. Part 3: Africa. Geological Society. Natural History Museum, London, p. 214.
Werner, M., Cook, N. J. (2001) Nb-rich brookite from Gross Brukkaros, Namibia: substitution mechanisms and Fe2+/Fe3+ ratios. Mineralogical Magazine, 65 (3) 437-440 doi:10.1180/002646101300119510
Cairncross, Bruce (2004) Field Guide to Rocks & Minerals of Southern Africa. 288pp.
von Bezing, Ludi (2007) Namibia - Minerals and Localities. Bode Verlag GmbH, Haltern.
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