| [var. Melanite] Orris, Greta J., Grauch, Richard I. (2002) Rare Earth Element Mines, Deposits, and Occurrences. Open-File Report 2002-189. US Geological Survey doi:10.3133/ofr02189 Le Roex, A. P., & Lanyon, R. (1998). Isotope and trace element geochemistry of Cretaceous Damaraland lamprophyres and carbonatites, northwestern Namibia: Evidence for plume—lithosphere interactions. Journal of Petrology, 39(6), 1117-1146. doi.org/10.1093/petroj/39.6.1117 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 Prins, P. 1981. The geochemical evolution of the alkaline and carbonatite complexes of the Damaraland igneous province, South West Africa. Annale Universiteit van Stellenbosch, Serie A1, Geologie, 3, 145-278. Van Zijl, P.J. 1962. The geology, structure and petrology of the alkaline intrusions of Kalkfeld and Okorusu and the invaded Damara rocks. Annale Universiteit van Stellenbosch, Serie A, 37, 237-339. |