The Significance of Metasomatized Continental Lithospheric Mantle in Flood Basalt Formation - Constraints From Mantle Xenoliths Beneath NW Namibia

纳米比亚西北部的两个捕虏体套提供了一个独特的机会，可以直接在主要的Parana-Etendeka大陆溢流玄武岩省附近对大陆岩石圈地幔和下地壳进行取样。其中一个捕虏体位置福尔斯落在早期特里斯坦热柱的影响范围内，而第二个位于热柱影响的南部，但在同一地壳单元内。详细的微量元素和同位素分析（Sr，Nd，Pb）对选定的样品，这些捕虏体套件，以及现有的地球化学数据的岩浆从早期羽和亏损软流圈，将被用来测试目前的模型，大陆溢流玄武岩的实际源区。这个项目是与南非开普敦UCT大学的Anton le Roex博士合作奋进。

EAR-9909255ClassTwo xenolith suites in NW Namibia provide a unique opportunity to sample directly the continental lithospheric mantle and lower crust in the vicinity of the major Parana-Etendeka continental flood basalt province. One xenolith locality falls within the sphere of influence of the early Tristan plume, whereas the second lies to the south of the plume influence, but within the same crustal unit. Detailed trace element and isotope analyses (Sr, Nd, Pb) on selected samples of these xenolith suites, together with available geochemical data on magmas from the early plume and depleted asthenosphere, will be used to test current models for the actual source regions of continental flood basalts. This project is collaborative endeavor with Dr. Anton le Roex, of the University of Cape Town UCT, South Africa.