Hypersthene from Namibia

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Namibia
Erongo Region Dâures Constituency Brandberg Area ⓘ Goboboseb Mountains	Ewart, A., Milner, S.C., Armstrong, R.A., Duncan, A.R. (1998) Etendeka Volcanism of the Goboboseb Mountains and Messum Igneous Complex, Namibia. Part II: Voluminous Quartz Latite Volcanism of the Awahab Magma System. Journal of Petrology, 39 (2) 227-253 doi:10.1093/petroj/39.2.227
ⓘ Messum Igneous Complex	Harris, C. (1995). Oxygen isotope geochemistry of the Mesozoic anorogenic complexes of Damaraland, northwest Namibia: evidence for crustal contamination and its effect on silica saturation. Contributions to Mineralogy and Petrology, 122(3), 308-321. doi.org/10.1007/s004100050130 Milner, S. C., Le Roex, A. P., & O'CONNOR, J. M. (1995). Age of Mesozoic igneous rocks in northwesternNamibia, and their relationship to continental breakup. Journal of the Geological Society, 152(1), 97-104. doi.org/10.1144/gsjgs.152.1.0097 Milner, S. C., & Ewart, A. (1989). The geology of the Goboboseb Mountain volcanics and their relationship to the Messum Complex, Namibia. Communications of the Geological Survey of Namibia, 5, 31-40. Aldrich, S. (1986). Progress report on a gravity and magnetic investigation of the Messum and Erongo igneous complexes. Communications of the Geological Survey of South West Africa/Namibia, 2, 47-52. Allsopp, H. L., Bristow, J. W., Logan, C. T., Eales, H. V., & Erlank, A. J. (1984). Rb-Sr geochronology of three Karoo-related intrusive complexes. In: Erlank, A.J. (ed.) Petrogenesis of the volcanic rocks of the Karoo Province. Geological Society of South Africa, Special Publications, 13,281-287. 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. Mathias, M. (1957). The geochemistry of the Messum igneous complex, south-west Africa. Geochimica et Cosmochimica Acta, 12(1-2), 29-46. doi.org/10.1016/0016-7037(57)90015-7 Korn, H.& Martin, H. 1955. The Messum igneous complex in South-West Africa. Transactions of the Geological Society of South Africa, 57, 83-124. Mathias, M. 1956. The petrology of the Messum igneous complex, South-West Africa. Transactions of the Geological Society of South Africa, 59, 1-35. doi.org/10.10520/AJA10120750_2142