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Phonolite from
Auas Mountains Occurrences, Windhoek Rural, Khomas Region, Namibia


Locality type:Occurrence
Classification
Type:Phonolite
Age information
Maximum recorded age:33 ± 1 Ma
Minimum recorded age:33 ± 1 Ma
Sample ages:
Recorded ageGeologic TimeSampleDating method
133 ± 1 MaOligocene - Ar/Ar
Sample references:
1 -
Fitch, F. J., & Miller, J. A. (1984). Dating Karoo igneous rocks by the conventional K-Ar and 40Ar/39Ar age spectrum methods. In:Erlank, A.J. (ed.) Petrogenesis of the volcanic rocks of the Karoo Province. Geological Society of South Africa, Special Publication, 13, 247-266.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Phonolite data
Locality Data:Click here to view Auas Mountains Occurrences, Windhoek Rural, Khomas Region, Namibia
Data Identifiers
Mindat Occurrence Record ID:1432131
Long-form Identifier:1:3:1432131:7
GUID (UUID V4):0
Localities for Phonolite in this Region
Regenstein Vent, Auas Mountains Occurrences, Windhoek Rural, Khomas Region, Namibia
Nearest other occurrences of Phonolite
2.8km (1.8 miles) ⓘAris Quarries, Aris, Windhoek Rural, Khomas Region, Namibia
12.5km (7.8 miles) ⓘRegenstein Vent, Auas Mountains Occurrences, Windhoek Rural, Khomas Region, Namibia
40.1km (24.9 miles) ⓘStalhart volcanic field, Windhoek Rural, Khomas Region, Namibia
51.6km (32.0 miles) ⓘDuruchaus Farm 249, Windhoek Rural, Khomas Region, Namibia
References
Gevers, T. W. (1933). Alkali-rocks in the Auas Mountains, south of Windhoek, SWA. South African Journal of Geology, 36(1), 77-88. https://journals.co.za/doi/pdf/10.10520/AJA10120750_1737
Ferreira, C. A. M., Jacob, R. E., Marsh, J. S. (1979) Base-Metal Mineralization in Alkaline Pyroclastics - the Regenstein Vent, South West Africa. Transactions of the Geological Society of South Africa, 82.
Fitch, F. J., & Miller, J. A. (1984). Dating Karoo igneous rocks by the conventional K-Ar and 40Ar/39Ar age spectrum methods. In:Erlank, A.J. (ed.) Petrogenesis of the volcanic rocks of the Karoo Province. Geological Society of South Africa, Special Publication, 13, 247-266.
Von Knorring, O., & Franke, W. (1987). A preliminary note on the mineralogy and geochemistry of the Aris phonolite, SWA/Namibia. Communications of the Geological Survey of SW Africa/Namibia, 3, 61.
 
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